#include <kern/thread.h>
#include <kern/host.h>
#include <kern/policy_internal.h>
+#include <kern/thread_group.h>
#include <IOKit/IOBSD.h>
#include <mach/task.h>
#include <mach/host_priv.h>
#include <mach/mach_host.h>
+#include <os/log.h>
#include <pexpert/pexpert.h>
#include <sys/coalition.h>
#include <sys/kern_event.h>
#include <sys/kern_memorystatus.h>
#include <mach/machine/sdt.h>
+#include <libkern/section_keywords.h>
/* For logging clarity */
-static const char *jetsam_kill_cause_name[] = {
+static const char *memorystatus_kill_cause_name[] = {
"" ,
"jettisoned" , /* kMemorystatusKilled */
"highwater" , /* kMemorystatusKilledHiwat */
"per-process-limit" , /* kMemorystatusKilledPerProcessLimit */
"diagnostic" , /* kMemorystatusKilledDiagnostic */
"idle-exit" , /* kMemorystatusKilledIdleExit */
+ "zone-map-exhaustion" , /* kMemorystatusKilledZoneMapExhaustion */
};
-#if CONFIG_JETSAM
+static const char *
+memorystatus_priority_band_name(int32_t priority)
+{
+ switch (priority) {
+ case JETSAM_PRIORITY_FOREGROUND:
+ return "FOREGROUND";
+ case JETSAM_PRIORITY_AUDIO_AND_ACCESSORY:
+ return "AUDIO_AND_ACCESSORY";
+ case JETSAM_PRIORITY_CONDUCTOR:
+ return "CONDUCTOR";
+ case JETSAM_PRIORITY_HOME:
+ return "HOME";
+ case JETSAM_PRIORITY_EXECUTIVE:
+ return "EXECUTIVE";
+ case JETSAM_PRIORITY_IMPORTANT:
+ return "IMPORTANT";
+ case JETSAM_PRIORITY_CRITICAL:
+ return "CRITICAL";
+ }
+
+ return ("?");
+}
+
/* Does cause indicate vm or fc thrashing? */
static boolean_t
-is_thrashing(unsigned cause)
+is_reason_thrashing(unsigned cause)
{
switch (cause) {
case kMemorystatusKilledVMThrashing:
}
}
-/* Callback into vm_compressor.c to signal that thrashing has been mitigated. */
-extern void vm_thrashing_jetsam_done(void);
-#endif /* CONFIG_JETSAM */
+/* Is the zone map almost full? */
+static boolean_t
+is_reason_zone_map_exhaustion(unsigned cause)
+{
+ if (cause == kMemorystatusKilledZoneMapExhaustion)
+ return TRUE;
+ return FALSE;
+}
+
+/*
+ * Returns the current zone map size and capacity to include in the jetsam snapshot.
+ * Defined in zalloc.c
+ */
+extern void get_zone_map_size(uint64_t *current_size, uint64_t *capacity);
+
+/*
+ * Returns the name of the largest zone and its size to include in the jetsam snapshot.
+ * Defined in zalloc.c
+ */
+extern void get_largest_zone_info(char *zone_name, size_t zone_name_len, uint64_t *zone_size);
/* These are very verbose printfs(), enable with
* MEMORYSTATUS_DEBUG_LOG
#define SET_ACTIVE_LIMITS_LOCKED(p, limit, is_fatal) \
MACRO_BEGIN \
(p)->p_memstat_memlimit_active = (limit); \
- (p)->p_memstat_state &= ~P_MEMSTAT_MEMLIMIT_ACTIVE_EXC_TRIGGERED; \
if (is_fatal) { \
(p)->p_memstat_state |= P_MEMSTAT_MEMLIMIT_ACTIVE_FATAL; \
} else { \
#define SET_INACTIVE_LIMITS_LOCKED(p, limit, is_fatal) \
MACRO_BEGIN \
(p)->p_memstat_memlimit_inactive = (limit); \
- (p)->p_memstat_state &= ~P_MEMSTAT_MEMLIMIT_INACTIVE_EXC_TRIGGERED; \
if (is_fatal) { \
(p)->p_memstat_state |= P_MEMSTAT_MEMLIMIT_INACTIVE_FATAL; \
} else { \
} \
MACRO_END
-#define CACHE_ACTIVE_LIMITS_LOCKED(p, trigger_exception) \
+#define CACHE_ACTIVE_LIMITS_LOCKED(p, is_fatal) \
MACRO_BEGIN \
(p)->p_memstat_memlimit = (p)->p_memstat_memlimit_active; \
if ((p)->p_memstat_state & P_MEMSTAT_MEMLIMIT_ACTIVE_FATAL) { \
(p)->p_memstat_state |= P_MEMSTAT_FATAL_MEMLIMIT; \
+ is_fatal = TRUE; \
} else { \
(p)->p_memstat_state &= ~P_MEMSTAT_FATAL_MEMLIMIT; \
- } \
- if ((p)->p_memstat_state & P_MEMSTAT_MEMLIMIT_ACTIVE_EXC_TRIGGERED) { \
- trigger_exception = FALSE; \
- } else { \
- trigger_exception = TRUE; \
+ is_fatal = FALSE; \
} \
MACRO_END
-#define CACHE_INACTIVE_LIMITS_LOCKED(p, trigger_exception) \
+#define CACHE_INACTIVE_LIMITS_LOCKED(p, is_fatal) \
MACRO_BEGIN \
(p)->p_memstat_memlimit = (p)->p_memstat_memlimit_inactive; \
if ((p)->p_memstat_state & P_MEMSTAT_MEMLIMIT_INACTIVE_FATAL) { \
(p)->p_memstat_state |= P_MEMSTAT_FATAL_MEMLIMIT; \
+ is_fatal = TRUE; \
} else { \
(p)->p_memstat_state &= ~P_MEMSTAT_FATAL_MEMLIMIT; \
- } \
- if ((p)->p_memstat_state & P_MEMSTAT_MEMLIMIT_INACTIVE_EXC_TRIGGERED) { \
- trigger_exception = FALSE; \
- } else { \
- trigger_exception = TRUE; \
+ is_fatal = FALSE; \
} \
MACRO_END
* Memorystatus kevents
*/
-static int filt_memorystatusattach(struct knote *kn);
+static int filt_memorystatusattach(struct knote *kn, struct kevent_internal_s *kev);
static void filt_memorystatusdetach(struct knote *kn);
static int filt_memorystatus(struct knote *kn, long hint);
static int filt_memorystatustouch(struct knote *kn, struct kevent_internal_s *kev);
static int filt_memorystatusprocess(struct knote *kn, struct filt_process_s *data, struct kevent_internal_s *kev);
-struct filterops memorystatus_filtops = {
+SECURITY_READ_ONLY_EARLY(struct filterops) memorystatus_filtops = {
.f_attach = filt_memorystatusattach,
.f_detach = filt_memorystatusdetach,
.f_event = filt_memorystatus,
static void memorystatus_update_priority_locked(proc_t p, int priority, boolean_t head_insert, boolean_t skip_demotion_check);
+int memorystatus_update_priority_for_appnap(proc_t p, boolean_t is_appnap);
+
vm_pressure_level_t convert_internal_pressure_level_to_dispatch_level(vm_pressure_level_t);
boolean_t is_knote_registered_modify_task_pressure_bits(struct knote*, int, task_t, vm_pressure_level_t, vm_pressure_level_t);
memstat_bucket_t memstat_bucket[MEMSTAT_BUCKET_COUNT];
+int memorystatus_get_proccnt_upto_priority(int32_t max_bucket_index);
+
uint64_t memstat_idle_demotion_deadline = 0;
int system_procs_aging_band = JETSAM_PRIORITY_AGING_BAND1;
unsigned int jetsam_aging_policy = kJetsamAgingPolicyLegacy;
extern int corpse_for_fatal_memkill;
-extern unsigned long total_corpses_count;
+extern unsigned long total_corpses_count(void) __attribute__((pure));
extern void task_purge_all_corpses(void);
+boolean_t memorystatus_allowed_vm_map_fork(__unused task_t);
#if 0
SYSCTL_INT(_kern, OID_AUTO, max_task_pmem, CTLFLAG_RD|CTLFLAG_LOCKED|CTLFLAG_MASKED, &max_task_footprint_mb, 0, "");
+#if CONFIG_EMBEDDED
+
+SYSCTL_INT(_kern, OID_AUTO, memorystatus_level, CTLFLAG_RD|CTLFLAG_LOCKED, &memorystatus_level, 0, "");
+
+#endif /* CONFIG_EMBEDDED */
int
memorystatus_get_level(__unused struct proc *p, struct memorystatus_get_level_args *args, __unused int *ret)
static boolean_t memorystatus_kill_process_sync(pid_t victim_pid, uint32_t cause, os_reason_t jetsam_reason);
-/* Jetsam */
-
-#if CONFIG_JETSAM
-
-static int memorystatus_cmd_set_jetsam_memory_limit(pid_t pid, int32_t high_water_mark, __unused int32_t *retval, boolean_t is_fatal_limit);
-
static int memorystatus_cmd_set_memlimit_properties(pid_t pid, user_addr_t buffer, size_t buffer_size, __unused int32_t *retval);
static int memorystatus_set_memlimit_properties(pid_t pid, memorystatus_memlimit_properties_t *entry);
unsigned int memorystatus_delta = 0;
-static unsigned int memorystatus_available_pages_critical_base = 0;
-//static unsigned int memorystatus_last_foreground_pressure_pages = (unsigned int)-1;
-static unsigned int memorystatus_available_pages_critical_idle_offset = 0;
-
/* Jetsam Loop Detection */
-static boolean_t memorystatus_jld_enabled = TRUE; /* Enables jetsam loop detection on all devices */
+static boolean_t memorystatus_jld_enabled = FALSE; /* Enable jetsam loop detection */
static uint32_t memorystatus_jld_eval_period_msecs = 0; /* Init pass sets this based on device memory size */
static int memorystatus_jld_eval_aggressive_count = 3; /* Raise the priority max after 'n' aggressive loops */
static int memorystatus_jld_eval_aggressive_priority_band_max = 15; /* Kill aggressively up through this band */
SYSCTL_UINT(_kern, OID_AUTO, memorystatus_jld_eval_aggressive_priority_band_max, CTLFLAG_RW|CTLFLAG_LOCKED, &memorystatus_jld_eval_aggressive_priority_band_max, 0, "");
#endif /* DEVELOPMENT || DEBUG */
-#if DEVELOPMENT || DEBUG
-static unsigned int memorystatus_jetsam_panic_debug = 0;
-static unsigned int memorystatus_jetsam_policy_offset_pages_diagnostic = 0;
-#endif
-
-static unsigned int memorystatus_jetsam_policy = kPolicyDefault;
-static unsigned int memorystatus_thread_wasted_wakeup = 0;
-
static uint32_t kill_under_pressure_cause = 0;
/*
static void memorystatus_get_task_memory_region_count(task_t task, uint64_t *count);
static uint32_t memorystatus_build_state(proc_t p);
-static void memorystatus_update_levels_locked(boolean_t critical_only);
//static boolean_t memorystatus_issue_pressure_kevent(boolean_t pressured);
static boolean_t memorystatus_kill_top_process(boolean_t any, boolean_t sort_flag, uint32_t cause, os_reason_t jetsam_reason, int32_t *priority, uint32_t *errors);
-static boolean_t memorystatus_kill_top_process_aggressive(boolean_t any, uint32_t cause, os_reason_t jetsam_reason, int aggr_count, int32_t priority_max, uint32_t *errors);
+static boolean_t memorystatus_kill_top_process_aggressive(uint32_t cause, int aggr_count, int32_t priority_max, uint32_t *errors);
static boolean_t memorystatus_kill_elevated_process(uint32_t cause, os_reason_t jetsam_reason, int aggr_count, uint32_t *errors);
static boolean_t memorystatus_kill_hiwat_proc(uint32_t *errors);
extern void qsort(void *a, size_t n, size_t es, cmpfunc_t cmp);
static int memstat_asc_cmp(const void *a, const void *b);
-#endif /* CONFIG_JETSAM */
-
/* VM pressure */
extern unsigned int vm_page_free_count;
extern unsigned int vm_page_secluded_count;
#endif /* CONFIG_SECLUDED_MEMORY */
-#if VM_PRESSURE_EVENTS
-
-boolean_t memorystatus_warn_process(pid_t pid, boolean_t exceeded);
-
-vm_pressure_level_t memorystatus_vm_pressure_level = kVMPressureNormal;
-
-#if CONFIG_MEMORYSTATUS
+#if CONFIG_JETSAM
unsigned int memorystatus_available_pages = (unsigned int)-1;
unsigned int memorystatus_available_pages_pressure = 0;
unsigned int memorystatus_available_pages_critical = 0;
+static unsigned int memorystatus_available_pages_critical_base = 0;
+static unsigned int memorystatus_available_pages_critical_idle_offset = 0;
+
+#if DEVELOPMENT || DEBUG
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages, CTLFLAG_RD | CTLFLAG_LOCKED, &memorystatus_available_pages, 0, "");
+#else
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages, CTLFLAG_RD | CTLFLAG_MASKED | CTLFLAG_LOCKED, &memorystatus_available_pages, 0, "");
+#endif /* DEVELOPMENT || DEBUG */
+
+static unsigned int memorystatus_jetsam_policy = kPolicyDefault;
+unsigned int memorystatus_policy_more_free_offset_pages = 0;
+static void memorystatus_update_levels_locked(boolean_t critical_only);
+static unsigned int memorystatus_thread_wasted_wakeup = 0;
+
+/* Callback into vm_compressor.c to signal that thrashing has been mitigated. */
+extern void vm_thrashing_jetsam_done(void);
+static int memorystatus_cmd_set_jetsam_memory_limit(pid_t pid, int32_t high_water_mark, __unused int32_t *retval, boolean_t is_fatal_limit);
+
+int32_t max_kill_priority = JETSAM_PRIORITY_MAX;
+
+#else /* CONFIG_JETSAM */
+
+uint64_t memorystatus_available_pages = (uint64_t)-1;
+uint64_t memorystatus_available_pages_pressure = (uint64_t)-1;
+uint64_t memorystatus_available_pages_critical = (uint64_t)-1;
+
+int32_t max_kill_priority = JETSAM_PRIORITY_IDLE;
+#endif /* CONFIG_JETSAM */
+
unsigned int memorystatus_frozen_count = 0;
unsigned int memorystatus_suspended_count = 0;
-unsigned int memorystatus_policy_more_free_offset_pages = 0;
+
+#if VM_PRESSURE_EVENTS
+
+boolean_t memorystatus_warn_process(pid_t pid, __unused boolean_t is_active, __unused boolean_t is_fatal, boolean_t exceeded);
+
+vm_pressure_level_t memorystatus_vm_pressure_level = kVMPressureNormal;
/*
* We use this flag to signal if we have any HWM offenders
boolean_t memorystatus_hwm_candidates = 0;
static int memorystatus_send_note(int event_code, void *data, size_t data_length);
-#endif /* CONFIG_MEMORYSTATUS */
#endif /* VM_PRESSURE_EVENTS */
lck_grp_t *disconnect_page_mappings_lck_grp;
static lck_mtx_t disconnect_page_mappings_mutex;
-#endif
+extern boolean_t kill_on_no_paging_space;
+#endif /* DEVELOPMENT || DEBUG */
/* Freeze */
extern uint64_t vm_swap_get_free_space(void);
-static boolean_t memorystatus_freeze_update_throttle();
+static boolean_t memorystatus_freeze_update_throttle(void);
#endif /* CONFIG_FREEZE */
proc_t p;
unsigned int b = 0;
int error, enable = 0;
+ boolean_t use_active; /* use the active limit and active limit attributes */
+ boolean_t is_fatal;
error = SYSCTL_OUT(req, arg1, sizeof(int));
if (error || !req->newptr) {
p = memorystatus_get_first_proc_locked(&b, TRUE);
while (p) {
- boolean_t trigger_exception;
+ use_active = proc_jetsam_state_is_active_locked(p);
if (enable) {
- /*
- * No need to consider P_MEMSTAT_MEMLIMIT_BACKGROUND anymore.
- * Background limits are described via the inactive limit slots.
- */
- if (proc_jetsam_state_is_active_locked(p) == TRUE) {
- CACHE_ACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ if (use_active == TRUE) {
+ CACHE_ACTIVE_LIMITS_LOCKED(p, is_fatal);
} else {
- CACHE_INACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_INACTIVE_LIMITS_LOCKED(p, is_fatal);
}
} else {
*/
p->p_memstat_memlimit = -1;
p->p_memstat_state |= P_MEMSTAT_FATAL_MEMLIMIT;
- trigger_exception = TRUE;
+ is_fatal = TRUE;
}
/*
* Enforce the cached limit by writing to the ledger.
*/
- task_set_phys_footprint_limit_internal(p->task, (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit: -1, NULL, trigger_exception);
+ task_set_phys_footprint_limit_internal(p->task, (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit: -1, NULL, use_active, is_fatal);
p = memorystatus_get_next_proc_locked(&b, p, TRUE);
}
#if VM_PRESSURE_EVENTS
/*
- * This routine is used for targeted notifications
- * regardless of system memory pressure.
+ * This routine is used for targeted notifications regardless of system memory pressure
+ * and regardless of whether or not the process has already been notified.
+ * It bypasses and has no effect on the only-one-notification per soft-limit policy.
+ *
* "memnote" is the current user.
*/
/*
* See event.h ... fflags for EVFILT_MEMORYSTATUS
*/
- if (!((fflags == NOTE_MEMORYSTATUS_PRESSURE_NORMAL)||
- (fflags == NOTE_MEMORYSTATUS_PRESSURE_WARN) ||
- (fflags == NOTE_MEMORYSTATUS_PRESSURE_CRITICAL) ||
- (fflags == NOTE_MEMORYSTATUS_LOW_SWAP) ||
- (fflags == NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) ||
- (fflags == NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL))) {
+ if (!((fflags == NOTE_MEMORYSTATUS_PRESSURE_NORMAL)||
+ (fflags == NOTE_MEMORYSTATUS_PRESSURE_WARN) ||
+ (fflags == NOTE_MEMORYSTATUS_PRESSURE_CRITICAL) ||
+ (fflags == NOTE_MEMORYSTATUS_LOW_SWAP) ||
+ (fflags == NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) ||
+ (fflags == NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL) ||
+ (((fflags & NOTE_MEMORYSTATUS_MSL_STATUS) != 0 &&
+ ((fflags & ~NOTE_MEMORYSTATUS_MSL_STATUS) == 0))))) {
printf("memorystatus_vm_pressure_send: notification [0x%x] not supported \n", fflags);
error = 1;
#endif /* VM_PRESSURE_EVENTS */
-#if CONFIG_JETSAM
-
SYSCTL_INT(_kern, OID_AUTO, memorystatus_idle_snapshot, CTLFLAG_RW|CTLFLAG_LOCKED, &memorystatus_idle_snapshot, 0, "");
-SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages, CTLFLAG_RD|CTLFLAG_LOCKED, &memorystatus_available_pages, 0, "");
+#if CONFIG_JETSAM
SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages_critical, CTLFLAG_RD|CTLFLAG_LOCKED, &memorystatus_available_pages_critical, 0, "");
SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages_critical_base, CTLFLAG_RW|CTLFLAG_LOCKED, &memorystatus_available_pages_critical_base, 0, "");
SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages_critical_idle_offset, CTLFLAG_RW|CTLFLAG_LOCKED, &memorystatus_available_pages_critical_idle_offset, 0, "");
SYSCTL_UINT(_kern, OID_AUTO, memorystatus_policy_more_free_offset_pages, CTLFLAG_RW, &memorystatus_policy_more_free_offset_pages, 0, "");
+static unsigned int memorystatus_jetsam_panic_debug = 0;
+static unsigned int memorystatus_jetsam_policy_offset_pages_diagnostic = 0;
+
/* Diagnostic code */
enum {
boolean_t memorystatus_freeze_throttle_enabled = TRUE;
SYSCTL_UINT(_kern, OID_AUTO, memorystatus_freeze_throttle_enabled, CTLFLAG_RW|CTLFLAG_LOCKED, &memorystatus_freeze_throttle_enabled, 0, "");
+#define VM_PAGES_FOR_ALL_PROCS (2)
/*
* Manual trigger of freeze and thaw for dev / debug kernels only.
*/
if (error || !req->newptr)
return (error);
- if (pid == 2) {
+ if (pid == VM_PAGES_FOR_ALL_PROCS) {
vm_pageout_anonymous_pages();
return 0;
if (error || !req->newptr)
return (error);
- p = proc_find(pid);
- if (p != NULL) {
- error = task_thaw(p->task);
- proc_rele(p);
-
- if (error)
- error = EIO;
- return error;
+ if (pid == VM_PAGES_FOR_ALL_PROCS) {
+ do_fastwake_warmup_all();
+ return 0;
+ } else {
+ p = proc_find(pid);
+ if (p != NULL) {
+ error = task_thaw(p->task);
+ proc_rele(p);
+
+ if (error)
+ error = EIO;
+ return error;
+ }
}
return EINVAL;
#endif /* DEVELOPMENT || DEBUG */
-
-#if CONFIG_JETSAM
/*
* Picks the sorting routine for a given jetsam priority band.
*
#endif
proc_list_lock();
+
+ if (memstat_bucket[bucket_index].count == 0) {
+ proc_list_unlock();
+ return (0);
+ }
+
switch (bucket_index) {
case JETSAM_PRIORITY_FOREGROUND:
if (memorystatus_sort_by_largest_coalition_locked(bucket_index, coal_sort_order) == 0) {
}
}
-#endif /* CONFIG_JETSAM */
-
static proc_t memorystatus_get_first_proc_locked(unsigned int *bucket_index, boolean_t search) {
memstat_bucket_t *current_bucket;
proc_t next_p;
disconnect_page_mappings_lck_grp = lck_grp_alloc_init("disconnect_page_mappings", disconnect_page_mappings_lck_grp_attr);
lck_mtx_init(&disconnect_page_mappings_mutex, disconnect_page_mappings_lck_grp, NULL);
+
+ if (kill_on_no_paging_space == TRUE) {
+ max_kill_priority = JETSAM_PRIORITY_MAX;
+ }
#endif
- nanoseconds_to_absolutetime((uint64_t)DEFERRED_IDLE_EXIT_TIME_SECS * NSEC_PER_SEC, &memorystatus_sysprocs_idle_delay_time);
- nanoseconds_to_absolutetime((uint64_t)DEFERRED_IDLE_EXIT_TIME_SECS * NSEC_PER_SEC, &memorystatus_apps_idle_delay_time);
/* Init buckets */
for (i = 0; i < MEMSTAT_BUCKET_COUNT; i++) {
TAILQ_INIT(&memstat_bucket[i].list);
memstat_bucket[i].count = 0;
}
-
memorystatus_idle_demotion_call = thread_call_allocate((thread_call_func_t)memorystatus_perform_idle_demotion, NULL);
+#if CONFIG_JETSAM
+ nanoseconds_to_absolutetime((uint64_t)DEFERRED_IDLE_EXIT_TIME_SECS * NSEC_PER_SEC, &memorystatus_sysprocs_idle_delay_time);
+ nanoseconds_to_absolutetime((uint64_t)DEFERRED_IDLE_EXIT_TIME_SECS * NSEC_PER_SEC, &memorystatus_apps_idle_delay_time);
+
/* Apply overrides */
PE_get_default("kern.jetsam_delta", &delta_percentage, sizeof(delta_percentage));
if (delta_percentage == 0) {
assert(JETSAM_PRIORITY_ELEVATED_INACTIVE > system_procs_aging_band);
assert(JETSAM_PRIORITY_ELEVATED_INACTIVE > applications_aging_band);
-#if CONFIG_JETSAM
/* Take snapshots for idle-exit kills by default? First check the boot-arg... */
if (!PE_parse_boot_argn("jetsam_idle_snapshot", &memorystatus_idle_snapshot, sizeof (memorystatus_idle_snapshot))) {
/* ...no boot-arg, so check the device tree */
memorystatus_available_pages_critical_base = (critical_threshold_percentage / delta_percentage) * memorystatus_delta;
memorystatus_policy_more_free_offset_pages = (policy_more_free_offset_percentage / delta_percentage) * memorystatus_delta;
+ /* Jetsam Loop Detection */
+ if (max_mem <= (512 * 1024 * 1024)) {
+ /* 512 MB devices */
+ memorystatus_jld_eval_period_msecs = 8000; /* 8000 msecs == 8 second window */
+ } else {
+ /* 1GB and larger devices */
+ memorystatus_jld_eval_period_msecs = 6000; /* 6000 msecs == 6 second window */
+ }
+
+ memorystatus_jld_enabled = TRUE;
+
+ /* No contention at this point */
+ memorystatus_update_levels_locked(FALSE);
+
+#endif /* CONFIG_JETSAM */
+
memorystatus_jetsam_snapshot_max = maxproc;
memorystatus_jetsam_snapshot =
(memorystatus_jetsam_snapshot_t*)kalloc(sizeof(memorystatus_jetsam_snapshot_t) +
memset(&memorystatus_at_boot_snapshot, 0, sizeof(memorystatus_jetsam_snapshot_t));
- /* No contention at this point */
- memorystatus_update_levels_locked(FALSE);
-
- /* Jetsam Loop Detection */
- if (max_mem <= (512 * 1024 * 1024)) {
- /* 512 MB devices */
- memorystatus_jld_eval_period_msecs = 8000; /* 8000 msecs == 8 second window */
- } else {
- /* 1GB and larger devices */
- memorystatus_jld_eval_period_msecs = 6000; /* 6000 msecs == 6 second window */
- }
-#endif
-
#if CONFIG_FREEZE
memorystatus_freeze_threshold = (freeze_threshold_percentage / delta_percentage) * memorystatus_delta;
#endif
#else
#pragma unused(cause)
#endif
+
+ if (p->p_memstat_effectivepriority >= JETSAM_PRIORITY_FOREGROUND) {
+ printf("memorystatus: killing process %d [%s] in high band %s (%d) - memorystatus_available_pages: %llu\n", p->p_pid,
+ (*p->p_name ? p->p_name : "unknown"),
+ memorystatus_priority_band_name(p->p_memstat_effectivepriority), p->p_memstat_effectivepriority,
+ (uint64_t)memorystatus_available_pages);
+ }
+
int jetsam_flags = P_LTERM_JETSAM;
switch (cause) {
case kMemorystatusKilledHiwat: jetsam_flags |= P_JETSAM_HIWAT; break;
#if CONFIG_JETSAM
/* Update levels */
memorystatus_update_levels_locked(TRUE);
-#endif
+#else /* CONFIG_JETSAM */
+ /*
+ * Nothing to do here currently since we update
+ * memorystatus_available_pages in vm_pressure_response.
+ */
+#endif /* CONFIG_JETSAM */
}
/*
if (effective_now) {
if (p->p_memstat_effectivepriority < JETSAM_PRIORITY_ELEVATED_INACTIVE) {
- boolean_t trigger_exception;
- CACHE_ACTIVE_LIMITS_LOCKED(p, trigger_exception);
- task_set_phys_footprint_limit_internal(p->task, (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1, NULL, trigger_exception);
+ if(memorystatus_highwater_enabled) {
+ /*
+ * Process is about to transition from
+ * inactive --> active
+ * assign active state
+ */
+ boolean_t is_fatal;
+ boolean_t use_active = TRUE;
+ CACHE_ACTIVE_LIMITS_LOCKED(p, is_fatal);
+ task_set_phys_footprint_limit_internal(p->task, (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1, NULL, use_active, is_fatal);
+ }
memorystatus_update_priority_locked(p, JETSAM_PRIORITY_ELEVATED_INACTIVE, FALSE, FALSE);
}
} else {
new_bucket->count++;
if (memorystatus_highwater_enabled) {
- boolean_t trigger_exception;
+ boolean_t is_fatal;
+ boolean_t use_active;
/*
* If cached limit data is updated, then the limits
boolean_t ledger_update_needed = TRUE;
/*
- * No need to consider P_MEMSTAT_MEMLIMIT_BACKGROUND anymore.
- * Background limits are described via the inactive limit slots.
- *
* Here, we must update the cached memory limit if the task
* is transitioning between:
* active <--> inactive
if (p->p_memstat_dirty & P_DIRTY_TRACK) {
if (skip_demotion_check == TRUE && priority == JETSAM_PRIORITY_IDLE) {
- CACHE_INACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_INACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = FALSE;
} else {
ledger_update_needed = FALSE;
}
* BG --> FG
* assign active state
*/
- CACHE_ACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_ACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = TRUE;
} else if ((priority < JETSAM_PRIORITY_FOREGROUND) && (p->p_memstat_effectivepriority >= JETSAM_PRIORITY_FOREGROUND)) {
/*
* FG --> BG
* assign inactive state
*/
- CACHE_INACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_INACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = FALSE;
} else {
/*
* The transition between jetsam priority buckets apparently did
* Enforce the new limits by writing to the ledger
*/
if (ledger_update_needed) {
- task_set_phys_footprint_limit_internal(p->task, (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1, NULL, trigger_exception);
+ task_set_phys_footprint_limit_internal(p->task, (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1, NULL, use_active, is_fatal);
MEMORYSTATUS_DEBUG(3, "memorystatus_update_priority_locked: new limit on pid %d (%dMB %s) priority old --> new (%d --> %d) dirty?=0x%x %s\n",
p->p_pid, (p->p_memstat_memlimit > 0 ? p->p_memstat_memlimit : -1),
* memlimit_inactive_is_fatal When a process is inactive and exceeds its memory footprint,
* this describes whether or not it should be immediatly fatal.
*
- * memlimit_background This process has a high-water-mark while in the background.
- * No longer meaningful. Background limits are described via
- * the inactive slots. Flag is ignored.
- *
- *
* Returns: 0 Success
* non-0 Failure
*/
int
memorystatus_update(proc_t p, int priority, uint64_t user_data, boolean_t effective, boolean_t update_memlimit,
int32_t memlimit_active, boolean_t memlimit_active_is_fatal,
- int32_t memlimit_inactive, boolean_t memlimit_inactive_is_fatal,
- __unused boolean_t memlimit_background)
+ int32_t memlimit_inactive, boolean_t memlimit_inactive_is_fatal)
{
int ret;
boolean_t head_insert = false;
p->p_memstat_requestedpriority = priority;
if (update_memlimit) {
- boolean_t trigger_exception;
+ boolean_t is_fatal;
+ boolean_t use_active;
/*
* Posix_spawn'd processes come through this path to instantiate ledger limits.
memlimit_active, (memlimit_active_is_fatal ? "F " : "NF"),
memlimit_inactive, (memlimit_inactive_is_fatal ? "F " : "NF"));
- if (memlimit_background) {
-
- /*
- * With 2-level HWM support, we no longer honor P_MEMSTAT_MEMLIMIT_BACKGROUND.
- * Background limits are described via the inactive limit slots.
- */
-
- // p->p_memstat_state |= P_MEMSTAT_MEMLIMIT_BACKGROUND;
-
-#if DEVELOPMENT || DEBUG
- printf("memorystatus_update: WARNING %s[%d] set unused flag P_MEMSTAT_MEMLIMIT_BACKGROUND [A==%dMB %s] [IA==%dMB %s]\n",
- (*p->p_name ? p->p_name : "unknown"), p->p_pid,
- memlimit_active, (memlimit_active_is_fatal ? "F " : "NF"),
- memlimit_inactive, (memlimit_inactive_is_fatal ? "F " : "NF"));
-#endif /* DEVELOPMENT || DEBUG */
- }
-
if (memlimit_active <= 0) {
/*
* This process will have a system_wide task limit when active.
*/
if (proc_jetsam_state_is_active_locked(p) == TRUE) {
- CACHE_ACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_ACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = TRUE;
} else {
- CACHE_INACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_INACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = FALSE;
}
/*
*/
if (memorystatus_highwater_enabled) {
/* apply now */
- assert(trigger_exception == TRUE);
- task_set_phys_footprint_limit_internal(p->task, ((p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1), NULL, trigger_exception);
+ task_set_phys_footprint_limit_internal(p->task, ((p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1), NULL, use_active, is_fatal);
MEMORYSTATUS_DEBUG(3, "memorystatus_update: init: limit on pid %d (%dMB %s) targeting priority(%d) dirty?=0x%x %s\n",
p->p_pid, (p->p_memstat_memlimit > 0 ? p->p_memstat_memlimit : -1),
* explicitly because it won't be going through the demotion paths
* that take care to apply the limits appropriately.
*/
- assert((p->p_memstat_dirty & P_DIRTY_AGING_IN_PROGRESS) == 0);
+
+ if (p->p_memstat_state & P_MEMSTAT_USE_ELEVATED_INACTIVE_BAND) {
+
+ /*
+ * This process has the 'elevated inactive jetsam band' attribute.
+ * So, there will be no trip to IDLE after all.
+ * Instead, we pin the process in the elevated band,
+ * where its ACTIVE limits will apply.
+ */
+
+ priority = JETSAM_PRIORITY_ELEVATED_INACTIVE;
+ }
+
memorystatus_update_priority_locked(p, priority, false, true);
} else {
memorystatus_update_idle_priority_locked(p);
if (memorystatus_highwater_enabled) {
- boolean_t trigger_exception = FALSE, ledger_update_needed = TRUE;
+ boolean_t ledger_update_needed = TRUE;
+ boolean_t use_active;
+ boolean_t is_fatal;
/*
* We are in this path because this process transitioned between
* dirty <--> clean state. Update the cached memory limits.
if (proc_jetsam_state_is_active_locked(p) == TRUE) {
/*
+ * process is pinned in elevated band
+ * or
* process is dirty
*/
- CACHE_ACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_ACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = TRUE;
ledger_update_needed = TRUE;
} else {
/*
if (p->p_memstat_dirty & P_DIRTY_ALLOW_IDLE_EXIT) {
ledger_update_needed = FALSE;
} else {
- CACHE_INACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_INACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = FALSE;
ledger_update_needed = TRUE;
}
}
ledger_limit = -1;
}
proc_list_unlock();
- task_set_phys_footprint_limit_internal(p->task, ledger_limit, NULL, trigger_exception);
+ task_set_phys_footprint_limit_internal(p->task, ledger_limit, NULL, use_active, is_fatal);
proc_list_lock();
proc_rele_locked(p);
return snapshot_state;
}
-#if !CONFIG_JETSAM
-
static boolean_t
kill_idle_exit_proc(void)
{
proc_list_unlock();
if (victim_p) {
- printf("memorystatus_thread: idle exiting pid %d [%s]\n", victim_p->p_pid, (*victim_p->p_name ? victim_p->p_name : "(unknown)"));
+ printf("memorystatus: killing_idle_process pid %d [%s]\n", victim_p->p_pid, (*victim_p->p_name ? victim_p->p_name : "unknown"));
killed = memorystatus_do_kill(victim_p, kMemorystatusKilledIdleExit, jetsam_reason);
proc_rele(victim_p);
} else {
return killed;
}
-#endif
-#if CONFIG_JETSAM
static void
memorystatus_thread_wake(void) {
thread_wakeup((event_t)&memorystatus_wakeup);
}
-#endif /* CONFIG_JETSAM */
extern void vm_pressure_response(void);
return thread_block(continuation);
}
-static void
-memorystatus_thread(void *param __unused, wait_result_t wr __unused)
+static boolean_t
+memorystatus_avail_pages_below_pressure(void)
{
- static boolean_t is_vm_privileged = FALSE;
+#if CONFIG_EMBEDDED
+/*
+ * Instead of CONFIG_EMBEDDED for these *avail_pages* routines, we should
+ * key off of the system having dynamic swap support. With full swap support,
+ * the system shouldn't really need to worry about various page thresholds.
+ */
+ return (memorystatus_available_pages <= memorystatus_available_pages_pressure);
+#else /* CONFIG_EMBEDDED */
+ return FALSE;
+#endif /* CONFIG_EMBEDDED */
+}
-#if CONFIG_JETSAM
- boolean_t post_snapshot = FALSE;
- uint32_t errors = 0;
- uint32_t hwm_kill = 0;
- boolean_t sort_flag = TRUE;
- boolean_t corpse_list_purged = FALSE;
+static boolean_t
+memorystatus_avail_pages_below_critical(void)
+{
+#if CONFIG_EMBEDDED
+ return (memorystatus_available_pages <= memorystatus_available_pages_critical);
+#else /* CONFIG_EMBEDDED */
+ return FALSE;
+#endif /* CONFIG_EMBEDDED */
+}
- /* Jetsam Loop Detection - locals */
- memstat_bucket_t *bucket;
- int jld_bucket_count = 0;
- struct timeval jld_now_tstamp = {0,0};
- uint64_t jld_now_msecs = 0;
- int elevated_bucket_count = 0;
-
- /* Jetsam Loop Detection - statics */
- static uint64_t jld_timestamp_msecs = 0;
- static int jld_idle_kill_candidates = 0; /* Number of available processes in band 0,1 at start */
- static int jld_idle_kills = 0; /* Number of procs killed during eval period */
- static int jld_eval_aggressive_count = 0; /* Bumps the max priority in aggressive loop */
- static int32_t jld_priority_band_max = JETSAM_PRIORITY_UI_SUPPORT;
-#endif
+static boolean_t
+memorystatus_post_snapshot(int32_t priority, uint32_t cause)
+{
+#if CONFIG_EMBEDDED
+#pragma unused(cause)
+ /*
+ * Don't generate logs for steady-state idle-exit kills,
+ * unless it is overridden for debug or by the device
+ * tree.
+ */
- if (is_vm_privileged == FALSE) {
- /*
- * It's the first time the thread has run, so just mark the thread as privileged and block.
- * This avoids a spurious pass with unset variables, as set out in <rdar://problem/9609402>.
- */
- thread_wire(host_priv_self(), current_thread(), TRUE);
- is_vm_privileged = TRUE;
-
- if (vm_restricted_to_single_processor == TRUE)
- thread_vm_bind_group_add();
+ return ((priority != JETSAM_PRIORITY_IDLE) || memorystatus_idle_snapshot);
- memorystatus_thread_block(0, memorystatus_thread);
+#else /* CONFIG_EMBEDDED */
+ /*
+ * Don't generate logs for steady-state idle-exit kills,
+ * unless
+ * - it is overridden for debug or by the device
+ * tree.
+ * OR
+ * - the kill causes are important i.e. not kMemorystatusKilledIdleExit
+ */
+
+ boolean_t snapshot_eligible_kill_cause = (is_reason_thrashing(cause) || is_reason_zone_map_exhaustion(cause));
+ return ((priority != JETSAM_PRIORITY_IDLE) || memorystatus_idle_snapshot || snapshot_eligible_kill_cause);
+#endif /* CONFIG_EMBEDDED */
+}
+
+static boolean_t
+memorystatus_action_needed(void)
+{
+#if CONFIG_EMBEDDED
+ return (is_reason_thrashing(kill_under_pressure_cause) ||
+ is_reason_zone_map_exhaustion(kill_under_pressure_cause) ||
+ memorystatus_available_pages <= memorystatus_available_pages_pressure);
+#else /* CONFIG_EMBEDDED */
+ return (is_reason_thrashing(kill_under_pressure_cause) ||
+ is_reason_zone_map_exhaustion(kill_under_pressure_cause));
+#endif /* CONFIG_EMBEDDED */
+}
+
+static boolean_t
+memorystatus_act_on_hiwat_processes(uint32_t *errors, uint32_t *hwm_kill, boolean_t *post_snapshot, __unused boolean_t *is_critical)
+{
+ boolean_t killed = memorystatus_kill_hiwat_proc(errors);
+
+ if (killed) {
+ *hwm_kill = *hwm_kill + 1;
+ *post_snapshot = TRUE;
+ return TRUE;
+ } else {
+ memorystatus_hwm_candidates = FALSE;
}
-
+
#if CONFIG_JETSAM
+ /* No highwater processes to kill. Continue or stop for now? */
+ if (!is_reason_thrashing(kill_under_pressure_cause) &&
+ !is_reason_zone_map_exhaustion(kill_under_pressure_cause) &&
+ (memorystatus_available_pages > memorystatus_available_pages_critical)) {
+ /*
+ * We are _not_ out of pressure but we are above the critical threshold and there's:
+ * - no compressor thrashing
+ * - enough zone memory
+ * - no more HWM processes left.
+ * For now, don't kill any other processes.
+ */
- KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_SCAN) | DBG_FUNC_START,
- memorystatus_available_pages, memorystatus_jld_enabled, memorystatus_jld_eval_period_msecs, memorystatus_jld_eval_aggressive_count,0);
+ if (*hwm_kill == 0) {
+ memorystatus_thread_wasted_wakeup++;
+ }
- /*
- * Jetsam aware version.
- *
- * The VM pressure notification thread is working it's way through clients in parallel.
+ *is_critical = FALSE;
+
+ return TRUE;
+ }
+#endif /* CONFIG_JETSAM */
+
+ return FALSE;
+}
+
+static boolean_t
+memorystatus_act_aggressive(uint32_t cause, os_reason_t jetsam_reason, int *jld_idle_kills, boolean_t *corpse_list_purged, boolean_t *post_snapshot)
+{
+ if (memorystatus_jld_enabled == TRUE) {
+
+ boolean_t killed;
+ uint32_t errors = 0;
+
+ /* Jetsam Loop Detection - locals */
+ memstat_bucket_t *bucket;
+ int jld_bucket_count = 0;
+ struct timeval jld_now_tstamp = {0,0};
+ uint64_t jld_now_msecs = 0;
+ int elevated_bucket_count = 0;
+
+ /* Jetsam Loop Detection - statics */
+ static uint64_t jld_timestamp_msecs = 0;
+ static int jld_idle_kill_candidates = 0; /* Number of available processes in band 0,1 at start */
+ static int jld_eval_aggressive_count = 0; /* Bumps the max priority in aggressive loop */
+ static int32_t jld_priority_band_max = JETSAM_PRIORITY_UI_SUPPORT;
+ /*
+ * Jetsam Loop Detection: attempt to detect
+ * rapid daemon relaunches in the lower bands.
+ */
+
+ microuptime(&jld_now_tstamp);
+
+ /*
+ * Ignore usecs in this calculation.
+ * msecs granularity is close enough.
+ */
+ jld_now_msecs = (jld_now_tstamp.tv_sec * 1000);
+
+ proc_list_lock();
+ switch (jetsam_aging_policy) {
+ case kJetsamAgingPolicyLegacy:
+ bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
+ jld_bucket_count = bucket->count;
+ bucket = &memstat_bucket[JETSAM_PRIORITY_AGING_BAND1];
+ jld_bucket_count += bucket->count;
+ break;
+ case kJetsamAgingPolicySysProcsReclaimedFirst:
+ case kJetsamAgingPolicyAppsReclaimedFirst:
+ bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
+ jld_bucket_count = bucket->count;
+ bucket = &memstat_bucket[system_procs_aging_band];
+ jld_bucket_count += bucket->count;
+ bucket = &memstat_bucket[applications_aging_band];
+ jld_bucket_count += bucket->count;
+ break;
+ case kJetsamAgingPolicyNone:
+ default:
+ bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
+ jld_bucket_count = bucket->count;
+ break;
+ }
+
+ bucket = &memstat_bucket[JETSAM_PRIORITY_ELEVATED_INACTIVE];
+ elevated_bucket_count = bucket->count;
+
+ proc_list_unlock();
+
+ /*
+ * memorystatus_jld_eval_period_msecs is a tunable
+ * memorystatus_jld_eval_aggressive_count is a tunable
+ * memorystatus_jld_eval_aggressive_priority_band_max is a tunable
+ */
+ if ( (jld_bucket_count == 0) ||
+ (jld_now_msecs > (jld_timestamp_msecs + memorystatus_jld_eval_period_msecs))) {
+
+ /*
+ * Refresh evaluation parameters
+ */
+ jld_timestamp_msecs = jld_now_msecs;
+ jld_idle_kill_candidates = jld_bucket_count;
+ *jld_idle_kills = 0;
+ jld_eval_aggressive_count = 0;
+ jld_priority_band_max = JETSAM_PRIORITY_UI_SUPPORT;
+ }
+
+ if (*jld_idle_kills > jld_idle_kill_candidates) {
+ jld_eval_aggressive_count++;
+
+#if DEVELOPMENT || DEBUG
+ printf("memorystatus: aggressive%d: beginning of window: %lld ms, : timestamp now: %lld ms\n",
+ jld_eval_aggressive_count,
+ jld_timestamp_msecs,
+ jld_now_msecs);
+ printf("memorystatus: aggressive%d: idle candidates: %d, idle kills: %d\n",
+ jld_eval_aggressive_count,
+ jld_idle_kill_candidates,
+ *jld_idle_kills);
+#endif /* DEVELOPMENT || DEBUG */
+
+ if ((jld_eval_aggressive_count == memorystatus_jld_eval_aggressive_count) &&
+ (total_corpses_count() > 0) && (*corpse_list_purged == FALSE)) {
+ /*
+ * If we reach this aggressive cycle, corpses might be causing memory pressure.
+ * So, in an effort to avoid jetsams in the FG band, we will attempt to purge
+ * corpse memory prior to this final march through JETSAM_PRIORITY_UI_SUPPORT.
+ */
+ task_purge_all_corpses();
+ *corpse_list_purged = TRUE;
+ }
+ else if (jld_eval_aggressive_count > memorystatus_jld_eval_aggressive_count) {
+ /*
+ * Bump up the jetsam priority limit (eg: the bucket index)
+ * Enforce bucket index sanity.
+ */
+ if ((memorystatus_jld_eval_aggressive_priority_band_max < 0) ||
+ (memorystatus_jld_eval_aggressive_priority_band_max >= MEMSTAT_BUCKET_COUNT)) {
+ /*
+ * Do nothing. Stick with the default level.
+ */
+ } else {
+ jld_priority_band_max = memorystatus_jld_eval_aggressive_priority_band_max;
+ }
+ }
+
+ /* Visit elevated processes first */
+ while (elevated_bucket_count) {
+
+ elevated_bucket_count--;
+
+ /*
+ * memorystatus_kill_elevated_process() drops a reference,
+ * so take another one so we can continue to use this exit reason
+ * even after it returns.
+ */
+
+ os_reason_ref(jetsam_reason);
+ killed = memorystatus_kill_elevated_process(
+ cause,
+ jetsam_reason,
+ jld_eval_aggressive_count,
+ &errors);
+
+ if (killed) {
+ *post_snapshot = TRUE;
+ if (memorystatus_avail_pages_below_pressure()) {
+ /*
+ * Still under pressure.
+ * Find another pinned processes.
+ */
+ continue;
+ } else {
+ return TRUE;
+ }
+ } else {
+ /*
+ * No pinned processes left to kill.
+ * Abandon elevated band.
+ */
+ break;
+ }
+ }
+
+ /*
+ * memorystatus_kill_top_process_aggressive() allocates its own
+ * jetsam_reason so the kMemorystatusKilledVMThrashing cause
+ * is consistent throughout the aggressive march.
+ */
+ killed = memorystatus_kill_top_process_aggressive(
+ kMemorystatusKilledVMThrashing,
+ jld_eval_aggressive_count,
+ jld_priority_band_max,
+ &errors);
+
+ if (killed) {
+ /* Always generate logs after aggressive kill */
+ *post_snapshot = TRUE;
+ *jld_idle_kills = 0;
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+ }
+
+ return FALSE;
+}
+
+
+static void
+memorystatus_thread(void *param __unused, wait_result_t wr __unused)
+{
+ static boolean_t is_vm_privileged = FALSE;
+
+ boolean_t post_snapshot = FALSE;
+ uint32_t errors = 0;
+ uint32_t hwm_kill = 0;
+ boolean_t sort_flag = TRUE;
+ boolean_t corpse_list_purged = FALSE;
+ int jld_idle_kills = 0;
+
+ if (is_vm_privileged == FALSE) {
+ /*
+ * It's the first time the thread has run, so just mark the thread as privileged and block.
+ * This avoids a spurious pass with unset variables, as set out in <rdar://problem/9609402>.
+ */
+ thread_wire(host_priv_self(), current_thread(), TRUE);
+ is_vm_privileged = TRUE;
+
+ if (vm_restricted_to_single_processor == TRUE)
+ thread_vm_bind_group_add();
+ thread_set_thread_name(current_thread(), "VM_memorystatus");
+ memorystatus_thread_block(0, memorystatus_thread);
+ }
+
+ KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_SCAN) | DBG_FUNC_START,
+ memorystatus_available_pages, memorystatus_jld_enabled, memorystatus_jld_eval_period_msecs, memorystatus_jld_eval_aggressive_count,0);
+
+ /*
+ * Jetsam aware version.
+ *
+ * The VM pressure notification thread is working it's way through clients in parallel.
*
* So, while the pressure notification thread is targeting processes in order of
* increasing jetsam priority, we can hopefully reduce / stop it's work by killing
* If we run out of HWM processes and our available pages drops below the critical threshold, then,
* we target the least recently used process in order of increasing jetsam priority (exception: the FG band).
*/
- while (is_thrashing(kill_under_pressure_cause) ||
- memorystatus_available_pages <= memorystatus_available_pages_pressure) {
+ while (memorystatus_action_needed()) {
boolean_t killed;
int32_t priority;
uint32_t cause;
case kMemorystatusKilledVMThrashing:
jetsam_reason_code = JETSAM_REASON_MEMORY_VMTHRASHING;
break;
+ case kMemorystatusKilledZoneMapExhaustion:
+ jetsam_reason_code = JETSAM_REASON_ZONE_MAP_EXHAUSTION;
+ break;
case kMemorystatusKilledVMPageShortage:
/* falls through */
default:
}
/* Highwater */
- killed = memorystatus_kill_hiwat_proc(&errors);
- if (killed) {
- hwm_kill++;
- post_snapshot = TRUE;
- goto done;
- } else {
- memorystatus_hwm_candidates = FALSE;
- }
-
- /* No highwater processes to kill. Continue or stop for now? */
- if (!is_thrashing(kill_under_pressure_cause) &&
- (memorystatus_available_pages > memorystatus_available_pages_critical)) {
- /*
- * We are _not_ out of pressure but we are above the critical threshold and there's:
- * - no compressor thrashing
- * - no more HWM processes left.
- * For now, don't kill any other processes.
- */
-
- if (hwm_kill == 0) {
- memorystatus_thread_wasted_wakeup++;
+ boolean_t is_critical = TRUE;
+ if (memorystatus_act_on_hiwat_processes(&errors, &hwm_kill, &post_snapshot, &is_critical)) {
+ if (is_critical == FALSE) {
+ /*
+ * For now, don't kill any other processes.
+ */
+ break;
+ } else {
+ goto done;
}
-
- break;
}
jetsam_reason = os_reason_create(OS_REASON_JETSAM, jetsam_reason_code);
printf("memorystatus_thread: failed to allocate jetsam reason\n");
}
- if (memorystatus_jld_enabled == TRUE) {
-
- /*
- * Jetsam Loop Detection: attempt to detect
- * rapid daemon relaunches in the lower bands.
- */
-
- microuptime(&jld_now_tstamp);
-
- /*
- * Ignore usecs in this calculation.
- * msecs granularity is close enough.
- */
- jld_now_msecs = (jld_now_tstamp.tv_sec * 1000);
-
- proc_list_lock();
- switch (jetsam_aging_policy) {
- case kJetsamAgingPolicyLegacy:
- bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
- jld_bucket_count = bucket->count;
- bucket = &memstat_bucket[JETSAM_PRIORITY_AGING_BAND1];
- jld_bucket_count += bucket->count;
- break;
- case kJetsamAgingPolicySysProcsReclaimedFirst:
- case kJetsamAgingPolicyAppsReclaimedFirst:
- bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
- jld_bucket_count = bucket->count;
- bucket = &memstat_bucket[system_procs_aging_band];
- jld_bucket_count += bucket->count;
- bucket = &memstat_bucket[applications_aging_band];
- jld_bucket_count += bucket->count;
- break;
- case kJetsamAgingPolicyNone:
- default:
- bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
- jld_bucket_count = bucket->count;
- break;
- }
-
- bucket = &memstat_bucket[JETSAM_PRIORITY_ELEVATED_INACTIVE];
- elevated_bucket_count = bucket->count;
-
- proc_list_unlock();
-
- /*
- * memorystatus_jld_eval_period_msecs is a tunable
- * memorystatus_jld_eval_aggressive_count is a tunable
- * memorystatus_jld_eval_aggressive_priority_band_max is a tunable
- */
- if ( (jld_bucket_count == 0) ||
- (jld_now_msecs > (jld_timestamp_msecs + memorystatus_jld_eval_period_msecs))) {
-
- /*
- * Refresh evaluation parameters
- */
- jld_timestamp_msecs = jld_now_msecs;
- jld_idle_kill_candidates = jld_bucket_count;
- jld_idle_kills = 0;
- jld_eval_aggressive_count = 0;
- jld_priority_band_max = JETSAM_PRIORITY_UI_SUPPORT;
- }
-
- if (jld_idle_kills > jld_idle_kill_candidates) {
- jld_eval_aggressive_count++;
-
-#if DEVELOPMENT || DEBUG
- printf("memorystatus: aggressive%d: beginning of window: %lld ms, : timestamp now: %lld ms\n",
- jld_eval_aggressive_count,
- jld_timestamp_msecs,
- jld_now_msecs);
- printf("memorystatus: aggressive%d: idle candidates: %d, idle kills: %d\n",
- jld_eval_aggressive_count,
- jld_idle_kill_candidates,
- jld_idle_kills);
-#endif /* DEVELOPMENT || DEBUG */
-
- if ((jld_eval_aggressive_count == memorystatus_jld_eval_aggressive_count) &&
- (total_corpses_count > 0) && (corpse_list_purged == FALSE)) {
- /*
- * If we reach this aggressive cycle, corpses might be causing memory pressure.
- * So, in an effort to avoid jetsams in the FG band, we will attempt to purge
- * corpse memory prior to this final march through JETSAM_PRIORITY_UI_SUPPORT.
- */
- task_purge_all_corpses();
- corpse_list_purged = TRUE;
- }
- else if (jld_eval_aggressive_count > memorystatus_jld_eval_aggressive_count) {
- /*
- * Bump up the jetsam priority limit (eg: the bucket index)
- * Enforce bucket index sanity.
- */
- if ((memorystatus_jld_eval_aggressive_priority_band_max < 0) ||
- (memorystatus_jld_eval_aggressive_priority_band_max >= MEMSTAT_BUCKET_COUNT)) {
- /*
- * Do nothing. Stick with the default level.
- */
- } else {
- jld_priority_band_max = memorystatus_jld_eval_aggressive_priority_band_max;
- }
- }
-
- /* Visit elevated processes first */
- while (elevated_bucket_count) {
-
- elevated_bucket_count--;
-
- /*
- * memorystatus_kill_elevated_process() drops a reference,
- * so take another one so we can continue to use this exit reason
- * even after it returns.
- */
-
- os_reason_ref(jetsam_reason);
- killed = memorystatus_kill_elevated_process(
- kMemorystatusKilledVMThrashing,
- jetsam_reason,
- jld_eval_aggressive_count,
- &errors);
-
- if (killed) {
- post_snapshot = TRUE;
- if (memorystatus_available_pages <= memorystatus_available_pages_pressure) {
- /*
- * Still under pressure.
- * Find another pinned processes.
- */
- continue;
- } else {
- goto done;
- }
- } else {
- /*
- * No pinned processes left to kill.
- * Abandon elevated band.
- */
- break;
- }
- }
-
- /*
- * memorystatus_kill_top_process_aggressive() drops a reference,
- * so take another one so we can continue to use this exit reason
- * even after it returns
- */
- os_reason_ref(jetsam_reason);
- killed = memorystatus_kill_top_process_aggressive(
- TRUE,
- kMemorystatusKilledVMThrashing,
- jetsam_reason,
- jld_eval_aggressive_count,
- jld_priority_band_max,
- &errors);
-
- if (killed) {
- /* Always generate logs after aggressive kill */
- post_snapshot = TRUE;
- jld_idle_kills = 0;
- goto done;
- }
- }
+ if (memorystatus_act_aggressive(cause, jetsam_reason, &jld_idle_kills, &corpse_list_purged, &post_snapshot)) {
+ goto done;
}
/*
sort_flag = FALSE;
if (killed) {
- /*
- * Don't generate logs for steady-state idle-exit kills,
- * unless it is overridden for debug or by the device
- * tree.
- */
- if ((priority != JETSAM_PRIORITY_IDLE) || memorystatus_idle_snapshot) {
+ if (memorystatus_post_snapshot(priority, cause) == TRUE) {
+
post_snapshot = TRUE;
}
}
}
- if ((priority >= JETSAM_PRIORITY_UI_SUPPORT) && (total_corpses_count > 0) && (corpse_list_purged == FALSE)) {
+ if ((priority >= JETSAM_PRIORITY_UI_SUPPORT) && (total_corpses_count() > 0) && (corpse_list_purged == FALSE)) {
/*
* If we have jetsammed a process in or above JETSAM_PRIORITY_UI_SUPPORT
* then we attempt to relieve pressure by purging corpse memory.
goto done;
}
- if (memorystatus_available_pages <= memorystatus_available_pages_critical) {
+ if (memorystatus_avail_pages_below_critical()) {
/*
* Still under pressure and unable to kill a process - purge corpse memory
*/
- if (total_corpses_count > 0) {
+ if (total_corpses_count() > 0) {
task_purge_all_corpses();
corpse_list_purged = TRUE;
}
- if (memorystatus_available_pages <= memorystatus_available_pages_critical) {
+ if (memorystatus_avail_pages_below_critical()) {
/*
* Still under pressure and unable to kill a process - panic
*/
- panic("memorystatus_jetsam_thread: no victim! available pages:%d\n", memorystatus_available_pages);
+ panic("memorystatus_jetsam_thread: no victim! available pages:%llu\n", (uint64_t)memorystatus_available_pages);
}
}
* To avoid that, we reset the flag here and notify the
* compressor.
*/
- if (is_thrashing(kill_under_pressure_cause)) {
+ if (is_reason_thrashing(kill_under_pressure_cause)) {
kill_under_pressure_cause = 0;
+#if CONFIG_JETSAM
vm_thrashing_jetsam_done();
+#endif /* CONFIG_JETSAM */
+ } else if (is_reason_zone_map_exhaustion(kill_under_pressure_cause)) {
+ kill_under_pressure_cause = 0;
}
os_reason_free(jetsam_reason);
memorystatus_clear_errors();
}
-#if VM_PRESSURE_EVENTS
- /*
- * LD: We used to target the foreground process first and foremost here.
- * Now, we target all processes, starting from the non-suspended, background
- * processes first. We will target foreground too.
- *
- * memorystatus_update_vm_pressure(TRUE);
- */
- //vm_pressure_response();
-#endif
-
if (post_snapshot) {
proc_list_lock();
size_t snapshot_size = sizeof(memorystatus_jetsam_snapshot_t) +
uint64_t timestamp_now = mach_absolute_time();
memorystatus_jetsam_snapshot->notification_time = timestamp_now;
memorystatus_jetsam_snapshot->js_gencount++;
- if (memorystatus_jetsam_snapshot_last_timestamp == 0 ||
- timestamp_now > memorystatus_jetsam_snapshot_last_timestamp + memorystatus_jetsam_snapshot_timeout) {
+ if (memorystatus_jetsam_snapshot_count > 0 && (memorystatus_jetsam_snapshot_last_timestamp == 0 ||
+ timestamp_now > memorystatus_jetsam_snapshot_last_timestamp + memorystatus_jetsam_snapshot_timeout)) {
proc_list_unlock();
int ret = memorystatus_send_note(kMemorystatusSnapshotNote, &snapshot_size, sizeof(snapshot_size));
if (!ret) {
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_SCAN) | DBG_FUNC_END,
memorystatus_available_pages, 0, 0, 0, 0);
-#else /* CONFIG_JETSAM */
-
- /*
- * Jetsam not enabled
- */
-
-#endif /* CONFIG_JETSAM */
-
memorystatus_thread_block(0, memorystatus_thread);
}
-#if !CONFIG_JETSAM
/*
* Returns TRUE:
* when an idle-exitable proc was killed
* when the attempt to kill an idle-exitable proc failed
*/
boolean_t memorystatus_idle_exit_from_VM(void) {
- return(kill_idle_exit_proc());
-}
-#endif /* !CONFIG_JETSAM */
-
-/*
- * Returns TRUE:
- * when exceeding ledger footprint is fatal.
- * Returns FALSE:
- * when exceeding ledger footprint is non fatal.
- */
-boolean_t
-memorystatus_turnoff_exception_and_get_fatalness(boolean_t warning, const int max_footprint_mb)
-{
- proc_t p = current_proc();
- boolean_t is_fatal;
-
- proc_list_lock();
-
- is_fatal = (p->p_memstat_state & P_MEMSTAT_FATAL_MEMLIMIT);
-
- if (warning == FALSE) {
- boolean_t is_active;
- boolean_t state_changed = FALSE;
-
- /*
- * We are here because a process has exceeded its ledger limit.
- * That is, the process is no longer in the limit warning range.
- *
- * When a process exceeds its ledger limit, we want an EXC_RESOURCE
- * to trigger, but only once per process per limit. We enforce that
- * here, by identifying the active/inactive limit type. We then turn
- * off the exception state by marking the limit as exception triggered.
- */
-
- is_active = proc_jetsam_state_is_active_locked(p);
-
- if (is_active == TRUE) {
- /*
- * turn off exceptions for active state
- */
- if (!(p->p_memstat_state & P_MEMSTAT_MEMLIMIT_ACTIVE_EXC_TRIGGERED)) {
- p->p_memstat_state |= P_MEMSTAT_MEMLIMIT_ACTIVE_EXC_TRIGGERED;
- state_changed = TRUE;
- }
- } else {
- /*
- * turn off exceptions for inactive state
- */
- if (!(p->p_memstat_state & P_MEMSTAT_MEMLIMIT_INACTIVE_EXC_TRIGGERED)) {
- p->p_memstat_state |= P_MEMSTAT_MEMLIMIT_INACTIVE_EXC_TRIGGERED;
- state_changed = TRUE;
- }
- }
- /*
- * The limit violation is logged here, but only once per process per limit.
- * This avoids excessive logging when a process consistently exceeds a soft limit.
- * Soft memory limit is a non-fatal high-water-mark
- * Hard memory limit is a fatal custom-task-limit or system-wide per-task memory limit.
- */
- if(state_changed) {
- printf("process %d (%s) exceeded physical memory footprint, the %s%sMemoryLimit of %d MB\n",
- p->p_pid, (*p->p_name ? p->p_name : "unknown"), (is_active ? "Active" : "Inactive"),
- (is_fatal ? "Hard" : "Soft"), max_footprint_mb);
- }
-
- }
- proc_list_unlock();
+ /*
+ * This routine should no longer be needed since we are
+ * now using jetsam bands on all platforms and so will deal
+ * with IDLE processes within the memorystatus thread itself.
+ *
+ * But we still use it because we observed that macos systems
+ * started heavy compression/swapping with a bunch of
+ * idle-exitable processes alive and doing nothing. We decided
+ * to rather kill those processes than start swapping earlier.
+ */
- return is_fatal;
+ return(kill_idle_exit_proc());
}
/*
* as well as the fatal task memory limits.
*/
void
-memorystatus_on_ledger_footprint_exceeded(boolean_t warning, boolean_t is_fatal)
+memorystatus_on_ledger_footprint_exceeded(boolean_t warning, boolean_t memlimit_is_active, boolean_t memlimit_is_fatal)
{
os_reason_t jetsam_reason = OS_REASON_NULL;
* This is a warning path which implies that the current process is close, but has
* not yet exceeded its per-process memory limit.
*/
- if (memorystatus_warn_process(p->p_pid, FALSE /* not exceeded */) != TRUE) {
+ if (memorystatus_warn_process(p->p_pid, memlimit_is_active, memlimit_is_fatal, FALSE /* not exceeded */) != TRUE) {
/* Print warning, since it's possible that task has not registered for pressure notifications */
- printf("task_exceeded_footprint: failed to warn the current task (%d exiting, or no handler registered?).\n", p->p_pid);
+ os_log(OS_LOG_DEFAULT, "memorystatus_on_ledger_footprint_exceeded: failed to warn the current task (%d exiting, or no handler registered?).\n", p->p_pid);
}
return;
}
#endif /* VM_PRESSURE_EVENTS */
- if (is_fatal) {
+ if (memlimit_is_fatal) {
/*
* If this process has no high watermark or has a fatal task limit, then we have been invoked because the task
* has violated either the system-wide per-task memory limit OR its own task limit.
* This path implies the current process has exceeded a non-fatal (soft) memory limit.
* Failure to send note is ignored here.
*/
- (void)memorystatus_warn_process(p->p_pid, TRUE /* exceeded */);
+ (void)memorystatus_warn_process(p->p_pid, memlimit_is_active, memlimit_is_fatal, TRUE /* exceeded */);
#endif /* VM_PRESSURE_EVENTS */
}
}
+void
+memorystatus_log_exception(const int max_footprint_mb, boolean_t memlimit_is_active, boolean_t memlimit_is_fatal)
+{
+ proc_t p = current_proc();
+
+ /*
+ * The limit violation is logged here, but only once per process per limit.
+ * Soft memory limit is a non-fatal high-water-mark
+ * Hard memory limit is a fatal custom-task-limit or system-wide per-task memory limit.
+ */
+
+ os_log_with_startup_serial(OS_LOG_DEFAULT, "EXC_RESOURCE -> %s[%d] exceeded mem limit: %s%s %d MB (%s)\n",
+ (*p->p_name ? p->p_name : "unknown"), p->p_pid, (memlimit_is_active ? "Active" : "Inactive"),
+ (memlimit_is_fatal ? "Hard" : "Soft"), max_footprint_mb,
+ (memlimit_is_fatal ? "fatal" : "non-fatal"));
+
+ return;
+}
+
+
/*
* Description:
- * Evaluates active vs. inactive process state.
+ * Evaluates process state to determine which limit
+ * should be applied (active vs. inactive limit).
+ *
+ * Processes that have the 'elevated inactive jetsam band' attribute
+ * are first evaluated based on their current priority band.
+ * presently elevated ==> active
+ *
* Processes that opt into dirty tracking are evaluated
* based on clean vs dirty state.
* dirty ==> active
static boolean_t
proc_jetsam_state_is_active_locked(proc_t p) {
- if (p->p_memstat_dirty & P_DIRTY_TRACK) {
+ if ((p->p_memstat_state & P_MEMSTAT_USE_ELEVATED_INACTIVE_BAND) &&
+ (p->p_memstat_effectivepriority == JETSAM_PRIORITY_ELEVATED_INACTIVE)) {
+ /*
+ * process has the 'elevated inactive jetsam band' attribute
+ * and process is present in the elevated band
+ * implies active state
+ */
+ return TRUE;
+ } else if (p->p_memstat_dirty & P_DIRTY_TRACK) {
/*
* process has opted into dirty tracking
* active state is based on dirty vs. clean
memorystatus_kill_process_sync(pid_t victim_pid, uint32_t cause, os_reason_t jetsam_reason) {
boolean_t res;
-#if CONFIG_JETSAM
uint32_t errors = 0;
if (victim_pid == -1) {
sizeof(memorystatus_jetsam_snapshot_entry_t) * memorystatus_jetsam_snapshot_count;
uint64_t timestamp_now = mach_absolute_time();
memorystatus_jetsam_snapshot->notification_time = timestamp_now;
- if (memorystatus_jetsam_snapshot_last_timestamp == 0 ||
- timestamp_now > memorystatus_jetsam_snapshot_last_timestamp + memorystatus_jetsam_snapshot_timeout) {
+ if (memorystatus_jetsam_snapshot_count > 0 && (memorystatus_jetsam_snapshot_last_timestamp == 0 ||
+ timestamp_now > memorystatus_jetsam_snapshot_last_timestamp + memorystatus_jetsam_snapshot_timeout)) {
proc_list_unlock();
int ret = memorystatus_send_note(kMemorystatusSnapshotNote, &snapshot_size, sizeof(snapshot_size));
if (!ret) {
proc_list_unlock();
}
}
-#else /* !CONFIG_JETSAM */
-
- res = memorystatus_kill_specific_process(victim_pid, cause, jetsam_reason);
-#endif /* CONFIG_JETSAM */
-
return res;
}
proc_list_lock();
-#if CONFIG_JETSAM
if (memorystatus_jetsam_snapshot_count == 0) {
memorystatus_init_jetsam_snapshot_locked(NULL,0);
}
proc_list_unlock();
- printf("%lu.%02d memorystatus: specifically killing pid %d [%s] (%s %d) - memorystatus_available_pages: %d\n",
- (unsigned long)tv_sec, tv_msec, victim_pid, (*p->p_name ? p->p_name : "(unknown)"),
- jetsam_kill_cause_name[cause], p->p_memstat_effectivepriority, memorystatus_available_pages);
-#else /* !CONFIG_JETSAM */
- proc_list_unlock();
-
- killtime = mach_absolute_time();
- absolutetime_to_microtime(killtime, &tv_sec, &tv_usec);
- tv_msec = tv_usec / 1000;
- printf("%lu.%02d memorystatus: specifically killing pid %d [%s] (%s %d)\n",
- (unsigned long)tv_sec, tv_msec, victim_pid, (*p->p_name ? p->p_name : "(unknown)"),
- jetsam_kill_cause_name[cause], p->p_memstat_effectivepriority);
-#endif /* CONFIG_JETSAM */
+ os_log_with_startup_serial(OS_LOG_DEFAULT, "%lu.%03d memorystatus: killing_specific_process pid %d [%s] (%s %d) - memorystatus_available_pages: %llu\n",
+ (unsigned long)tv_sec, tv_msec, victim_pid, (*p->p_name ? p->p_name : "unknown"),
+ memorystatus_kill_cause_name[cause], p->p_memstat_effectivepriority, (uint64_t)memorystatus_available_pages);
killed = memorystatus_do_kill(p, cause, jetsam_reason);
proc_rele(p);
}
}
+#endif /* CONFIG_JETSAM */
+
static void
memorystatus_get_task_memory_region_count(task_t task, uint64_t *count)
{
*count = get_task_memory_region_count(task);
}
+#if DEVELOPMENT || DEBUG
+
+/*
+ * Sysctl only used to test memorystatus_allowed_vm_map_fork() path.
+ * set a new pidwatch value
+ * or
+ * get the current pidwatch value
+ */
+
+uint64_t memorystatus_vm_map_fork_pidwatch_val = 0;
+#define MEMORYSTATUS_VM_MAP_FORK_ALLOWED 0x100000000
+#define MEMORYSTATUS_VM_MAP_FORK_NOT_ALLOWED 0x200000000
+
+static int sysctl_memorystatus_vm_map_fork_pidwatch SYSCTL_HANDLER_ARGS {
+#pragma unused(oidp, arg1, arg2)
+
+ uint64_t new_value = 0;
+ uint64_t old_value = 0;
+ int error = 0;
+
+ /*
+ * The pid is held in the low 32 bits.
+ * The 'allowed' flags are in the upper 32 bits.
+ */
+ old_value = memorystatus_vm_map_fork_pidwatch_val;
+
+ error = sysctl_io_number(req, old_value, sizeof(old_value), &new_value, NULL);
+
+ if (error || !req->newptr) {
+ /*
+ * No new value passed in.
+ */
+ return(error);
+ }
+
+ /*
+ * A new pid was passed in via req->newptr.
+ * Ignore any attempt to set the higher order bits.
+ */
+ memorystatus_vm_map_fork_pidwatch_val = new_value & 0xFFFFFFFF;
+ printf("memorystatus: pidwatch old_value = 0x%llx, new_value = 0x%llx \n", old_value, new_value);
+
+ return(error);
+}
+
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_vm_map_fork_pidwatch, CTLTYPE_QUAD | CTLFLAG_RW | CTLFLAG_LOCKED| CTLFLAG_MASKED,
+ 0, 0, sysctl_memorystatus_vm_map_fork_pidwatch, "Q", "get/set pid watched for in vm_map_fork");
+
+
+#define SET_VM_MAP_FORK_PIDWATCH_ALLOWED(task) \
+MACRO_BEGIN \
+if (memorystatus_vm_map_fork_pidwatch_val != 0) { \
+ proc_t p = get_bsdtask_info(task); \
+ if (p && (memorystatus_vm_map_fork_pidwatch_val == (uint64_t)p->p_pid)) { \
+ memorystatus_vm_map_fork_pidwatch_val |= MEMORYSTATUS_VM_MAP_FORK_ALLOWED; \
+ } \
+} \
+MACRO_END
+
+#define SET_VM_MAP_FORK_PIDWATCH_NOT_ALLOWED(task) \
+MACRO_BEGIN \
+if (memorystatus_vm_map_fork_pidwatch_val != 0) { \
+ proc_t p = get_bsdtask_info(task); \
+ if (p && (memorystatus_vm_map_fork_pidwatch_val == (uint64_t)p->p_pid)) { \
+ memorystatus_vm_map_fork_pidwatch_val |= MEMORYSTATUS_VM_MAP_FORK_NOT_ALLOWED; \
+ } \
+} \
+MACRO_END
+
+#else /* DEVELOPMENT || DEBUG */
+
+#define SET_VM_MAP_FORK_PIDWATCH_ALLOWED(task)
+#define SET_VM_MAP_FORK_PIDWATCH_NOT_ALLOWED(task)
+
+#endif /* DEVELOPMENT || DEBUG */
+
+/*
+ * Called during EXC_RESOURCE handling when a process exceeds a soft
+ * memory limit. This is the corpse fork path and here we decide if
+ * vm_map_fork will be allowed when creating the corpse.
+ * The task being considered is suspended.
+ *
+ * By default, a vm_map_fork is allowed to proceed.
+ *
+ * A few simple policy assumptions:
+ * Desktop platform is not considered in this path.
+ * The vm_map_fork is always allowed.
+ *
+ * If the device has a zero system-wide task limit,
+ * then the vm_map_fork is allowed.
+ *
+ * And if a process's memory footprint calculates less
+ * than or equal to half of the system-wide task limit,
+ * then the vm_map_fork is allowed. This calculation
+ * is based on the assumption that a process can
+ * munch memory up to the system-wide task limit.
+ */
+boolean_t
+memorystatus_allowed_vm_map_fork(__unused task_t task)
+{
+ boolean_t is_allowed = TRUE; /* default */
+
+#if CONFIG_EMBEDDED
+
+ uint64_t footprint_in_bytes = 0;
+ uint64_t purgeable_in_bytes = 0;
+ uint64_t max_allowed_bytes = 0;
+
+ if (max_task_footprint_mb == 0) {
+ SET_VM_MAP_FORK_PIDWATCH_ALLOWED(task);
+ return (is_allowed);
+ }
+
+ purgeable_in_bytes = get_task_purgeable_size(task);
+ footprint_in_bytes = get_task_phys_footprint(task);
+
+ /*
+ * Maximum is half the system-wide task limit.
+ */
+ max_allowed_bytes = ((((uint64_t)max_task_footprint_mb) * 1024ULL * 1024ULL) >> 1);
+
+ if (footprint_in_bytes > purgeable_in_bytes) {
+ footprint_in_bytes -= purgeable_in_bytes;
+ }
+
+ if (footprint_in_bytes <= max_allowed_bytes) {
+ SET_VM_MAP_FORK_PIDWATCH_ALLOWED(task);
+ return (is_allowed);
+ } else {
+ printf("memorystatus disallowed vm_map_fork %lld %lld\n", footprint_in_bytes, max_allowed_bytes);
+ SET_VM_MAP_FORK_PIDWATCH_NOT_ALLOWED(task);
+ return (!is_allowed);
+ }
+
+#else /* CONFIG_EMBEDDED */
+
+ SET_VM_MAP_FORK_PIDWATCH_ALLOWED(task);
+ return (is_allowed);
+
+#endif /* CONFIG_EMBEDDED */
+
+}
+
static void
memorystatus_get_task_page_counts(task_t task, uint32_t *footprint, uint32_t *max_footprint, uint32_t *max_footprint_lifetime, uint32_t *purgeable_pages)
{
*footprint = (uint32_t)pages;
if (max_footprint) {
- pages = (get_task_phys_footprint_max(task) / PAGE_SIZE_64);
+ pages = (get_task_phys_footprint_recent_max(task) / PAGE_SIZE_64);
assert(((uint32_t)pages) == pages);
*max_footprint = (uint32_t)pages;
}
return;
}
+#if CONFIG_JETSAM
void memorystatus_pages_update(unsigned int pages_avail)
{
memorystatus_available_pages = pages_avail;
}
#endif /* VM_PRESSURE_EVENTS */
}
+#endif /* CONFIG_JETSAM */
static boolean_t
memorystatus_init_jetsam_snapshot_entry_locked(proc_t p, memorystatus_jetsam_snapshot_entry_t *entry, uint64_t gencount)
snapshot->stats.compressor_pages = vm_stat.compressor_page_count;
snapshot->stats.total_uncompressed_pages_in_compressor = vm_stat.total_uncompressed_pages_in_compressor;
}
+
+ get_zone_map_size(&snapshot->stats.zone_map_size, &snapshot->stats.zone_map_capacity);
+ get_largest_zone_info(snapshot->stats.largest_zone_name, sizeof(snapshot->stats.largest_zone_name),
+ &snapshot->stats.largest_zone_size);
}
/*
#if DEVELOPMENT || DEBUG
+#if CONFIG_JETSAM
static int
memorystatus_cmd_set_panic_bits(user_addr_t buffer, uint32_t buffer_size) {
int ret;
return ret;
}
+#endif /* CONFIG_JETSAM */
/*
* Triggers a sort_order on a specified jetsam priority band.
{
pid_t aPid;
proc_t p = PROC_NULL, next_p = PROC_NULL;
- boolean_t new_snapshot = FALSE, killed = FALSE;
+ boolean_t new_snapshot = FALSE, force_new_snapshot = FALSE, killed = FALSE;
int kill_count = 0;
unsigned int i = 0;
uint32_t aPid_ep;
clock_sec_t tv_sec;
clock_usec_t tv_usec;
uint32_t tv_msec;
+ int32_t local_max_kill_prio = JETSAM_PRIORITY_IDLE;
#ifndef CONFIG_FREEZE
#pragma unused(any)
memorystatus_available_pages, 0, 0, 0, 0);
+#if CONFIG_JETSAM
if (sort_flag == TRUE) {
(void)memorystatus_sort_bucket(JETSAM_PRIORITY_FOREGROUND, JETSAM_SORT_DEFAULT);
}
+ local_max_kill_prio = max_kill_priority;
+
+ force_new_snapshot = FALSE;
+
+#else /* CONFIG_JETSAM */
+
+ if (sort_flag == TRUE) {
+ (void)memorystatus_sort_bucket(JETSAM_PRIORITY_IDLE, JETSAM_SORT_DEFAULT);
+ }
+
+ /*
+ * On macos, we currently only have 2 reasons to be here:
+ *
+ * kMemorystatusKilledZoneMapExhaustion
+ * AND
+ * kMemorystatusKilledVMThrashing
+ *
+ * If we are here because of kMemorystatusKilledZoneMapExhaustion, we will consider
+ * any and all processes as eligible kill candidates since we need to avoid a panic.
+ *
+ * Since this function can be called async. it is harder to toggle the max_kill_priority
+ * value before and after a call. And so we use this local variable to set the upper band
+ * on the eligible kill bands.
+ */
+ if (cause == kMemorystatusKilledZoneMapExhaustion) {
+ local_max_kill_prio = JETSAM_PRIORITY_MAX;
+ } else {
+ local_max_kill_prio = max_kill_priority;
+ }
+
+ /*
+ * And, because we are here under extreme circumstances, we force a snapshot even for
+ * IDLE kills.
+ */
+ force_new_snapshot = TRUE;
+
+#endif /* CONFIG_JETSAM */
+
proc_list_lock();
next_p = memorystatus_get_first_proc_locked(&i, TRUE);
- while (next_p) {
+ while (next_p && (next_p->p_memstat_effectivepriority <= local_max_kill_prio)) {
#if DEVELOPMENT || DEBUG
int activeProcess;
int procSuspendedForDiagnosis;
continue; /* with lock held */
}
-#if DEVELOPMENT || DEBUG
+#if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
if ((memorystatus_jetsam_policy & kPolicyDiagnoseActive) && procSuspendedForDiagnosis) {
printf("jetsam: continuing after ignoring proc suspended already for diagnosis - %d\n", aPid);
continue;
}
-#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
if (cause == kMemorystatusKilledVnodes)
{
* If the system runs out of vnodes, we systematically jetsam
* processes in hopes of stumbling onto a vnode gain that helps
* the system recover. The process that happens to trigger
- * this path has no known relationship to the vnode consumption.
- * We attempt to safeguard that process e.g: do not jetsam it.
+ * this path has no known relationship to the vnode shortage.
+ * Deadlock avoidance: attempt to safeguard the caller.
*/
if (p == current_proc()) {
{
/*
* Capture a snapshot if none exists and:
+ * - we are forcing a new snapshot creation, either because:
+ * - on a particular platform we need these snapshots every time, OR
+ * - a boot-arg/embedded device tree property has been set.
* - priority was not requested (this is something other than an ambient kill)
* - the priority was requested *and* the targeted process is not at idle priority
*/
if ((memorystatus_jetsam_snapshot_count == 0) &&
- (memorystatus_idle_snapshot || ((!priority) || (priority && (aPid_ep != JETSAM_PRIORITY_IDLE))))) {
+ (force_new_snapshot || memorystatus_idle_snapshot || ((!priority) || (priority && (aPid_ep != JETSAM_PRIORITY_IDLE))))) {
memorystatus_init_jetsam_snapshot_locked(NULL,0);
new_snapshot = TRUE;
}
absolutetime_to_microtime(killtime, &tv_sec, &tv_usec);
tv_msec = tv_usec / 1000;
-#if DEVELOPMENT || DEBUG
+#if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
if ((memorystatus_jetsam_policy & kPolicyDiagnoseActive) && activeProcess) {
MEMORYSTATUS_DEBUG(1, "jetsam: suspending pid %d [%s] (active) for diagnosis - memory_status_level: %d\n",
aPid, (*p->p_name ? p->p_name: "(unknown)"), memorystatus_level);
goto exit;
} else
-#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
{
/* Shift queue, update stats */
memorystatus_update_jetsam_snapshot_entry_locked(p, cause, killtime);
if (proc_ref_locked(p) == p) {
proc_list_unlock();
- printf("%lu.%02d memorystatus: %s %d [%s] (%s %d) - memorystatus_available_pages: %d\n",
+ os_log_with_startup_serial(OS_LOG_DEFAULT, "%lu.%03d memorystatus: %s pid %d [%s] (%s %d) - memorystatus_available_pages: %llu\n",
(unsigned long)tv_sec, tv_msec,
- ((aPid_ep == JETSAM_PRIORITY_IDLE) ? "idle exiting pid" : "jetsam killing top process pid"),
- aPid, (*p->p_name ? p->p_name : "(unknown)"),
- jetsam_kill_cause_name[cause], aPid_ep, memorystatus_available_pages);
+ ((aPid_ep == JETSAM_PRIORITY_IDLE) ? "killing_idle_process" : "killing_top_process"),
+ aPid, (*p->p_name ? p->p_name : "unknown"),
+ memorystatus_kill_cause_name[cause], aPid_ep, (uint64_t)memorystatus_available_pages);
/*
* memorystatus_do_kill() drops a reference, so take another one so we can
* Jetsam aggressively
*/
static boolean_t
-memorystatus_kill_top_process_aggressive(boolean_t any, uint32_t cause, os_reason_t jetsam_reason, int aggr_count,
+memorystatus_kill_top_process_aggressive(uint32_t cause, int aggr_count,
int32_t priority_max, uint32_t *errors)
{
pid_t aPid;
clock_sec_t tv_sec;
clock_usec_t tv_usec;
uint32_t tv_msec;
-
-#pragma unused(any)
+ os_reason_t jetsam_reason = OS_REASON_NULL;
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_START,
memorystatus_available_pages, priority_max, 0, 0, 0);
memorystatus_sort_bucket(JETSAM_PRIORITY_FOREGROUND, JETSAM_SORT_DEFAULT);
+ jetsam_reason = os_reason_create(OS_REASON_JETSAM, cause);
+ if (jetsam_reason == OS_REASON_NULL) {
+ printf("memorystatus_kill_top_process_aggressive: failed to allocate exit reason\n");
+ }
+
proc_list_lock();
next_p = memorystatus_get_first_proc_locked(&i, TRUE);
int procSuspendedForDiagnosis;
#endif /* DEVELOPMENT || DEBUG */
- if ((unsigned int)(next_p->p_memstat_effectivepriority) != i) {
+ if (((next_p->p_listflag & P_LIST_EXITED) != 0) ||
+ ((unsigned int)(next_p->p_memstat_effectivepriority) != i)) {
/*
- * We have raced with next_p running on another core, as it has
- * moved to a different jetsam priority band. This means we have
- * lost our place in line while traversing the jetsam list. We
+ * We have raced with next_p running on another core.
+ * It may be exiting or it may have moved to a different
+ * jetsam priority band. This means we have lost our
+ * place in line while traversing the jetsam list. We
* attempt to recover by rewinding to the beginning of the band
* we were already traversing. By doing this, we do not guarantee
* that no process escapes this aggressive march, but we can make
* skipping an entire range of processes less likely. (PR-21069019)
*/
- MEMORYSTATUS_DEBUG(1, "memorystatus: aggressive%d: rewinding %s moved from band %d --> %d\n",
- aggr_count, (*next_p->p_name ? next_p->p_name : "unknown"), i, next_p->p_memstat_effectivepriority);
+ MEMORYSTATUS_DEBUG(1, "memorystatus: aggressive%d: rewinding band %d, %s(%d) moved or exiting.\n",
+ aggr_count, i, (*next_p->p_name ? next_p->p_name : "unknown"), next_p->p_pid);
next_p = memorystatus_get_first_proc_locked(&i, TRUE);
continue;
continue;
}
-#if DEVELOPMENT || DEBUG
+#if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
if ((memorystatus_jetsam_policy & kPolicyDiagnoseActive) && procSuspendedForDiagnosis) {
printf("jetsam: continuing after ignoring proc suspended already for diagnosis - %d\n", aPid);
continue;
}
-#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
/*
* Capture a snapshot if none exists.
}
proc_list_unlock();
- printf("%lu.%01d memorystatus: aggressive%d: %s %d [%s] (%s %d) - memorystatus_available_pages: %d\n",
- (unsigned long)tv_sec, tv_msec, aggr_count,
- ((aPid_ep == JETSAM_PRIORITY_IDLE) ? "idle exiting pid" : "jetsam killing pid"),
- aPid, (*p->p_name ? p->p_name : "(unknown)"),
- jetsam_kill_cause_name[cause], aPid_ep, memorystatus_available_pages);
+ printf("%lu.%03d memorystatus: %s%d pid %d [%s] (%s %d) - memorystatus_available_pages: %llu\n",
+ (unsigned long)tv_sec, tv_msec,
+ ((aPid_ep == JETSAM_PRIORITY_IDLE) ? "killing_idle_process_aggressive" : "killing_top_process_aggressive"),
+ aggr_count, aPid, (*p->p_name ? p->p_name : "unknown"),
+ memorystatus_kill_cause_name[cause], aPid_ep, (uint64_t)memorystatus_available_pages);
memorystatus_level_snapshot = memorystatus_level;
continue;
}
-#if 0
- /*
- * No need to consider P_MEMSTAT_MEMLIMIT_BACKGROUND anymore.
- * Background limits are described via the inactive limit slots.
- * Their fatal/non-fatal setting will drive whether or not to be
- * considered in this kill path.
- */
-
- /* skip if a currently inapplicable limit is encountered */
- if ((p->p_memstat_state & P_MEMSTAT_MEMLIMIT_BACKGROUND) && (p->p_memstat_effectivepriority >= JETSAM_PRIORITY_FOREGROUND)) {
- continue;
- }
-#endif
footprint_in_bytes = get_task_phys_footprint(p->task);
memlimit_in_bytes = (((uint64_t)p->p_memstat_memlimit) * 1024ULL * 1024ULL); /* convert MB to bytes */
skip = (footprint_in_bytes <= memlimit_in_bytes);
-#if DEVELOPMENT || DEBUG
+#if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
if (!skip && (memorystatus_jetsam_policy & kPolicyDiagnoseActive)) {
if (p->p_memstat_state & P_MEMSTAT_DIAG_SUSPENDED) {
continue;
}
}
-#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
#if CONFIG_FREEZE
if (!skip) {
if (skip) {
continue;
} else {
-#if DEVELOPMENT || DEBUG
+#if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
MEMORYSTATUS_DEBUG(1, "jetsam: %s pid %d [%s] - %lld Mb > 1 (%d Mb)\n",
(memorystatus_jetsam_policy & kPolicyDiagnoseActive) ? "suspending": "killing",
aPid, (*p->p_name ? p->p_name : "unknown"),
(footprint_in_bytes / (1024ULL * 1024ULL)), /* converted bytes to MB */
p->p_memstat_memlimit);
-#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
if (memorystatus_jetsam_snapshot_count == 0) {
memorystatus_init_jetsam_snapshot_locked(NULL,0);
absolutetime_to_microtime(killtime, &tv_sec, &tv_usec);
tv_msec = tv_usec / 1000;
-#if DEVELOPMENT || DEBUG
+#if CONFIG_JETSAM && (DEVELOPMENT || DEBUG)
if (memorystatus_jetsam_policy & kPolicyDiagnoseActive) {
MEMORYSTATUS_DEBUG(1, "jetsam: pid %d suspended for diagnosis - memorystatus_available_pages: %d\n", aPid, memorystatus_available_pages);
memorystatus_update_jetsam_snapshot_entry_locked(p, kMemorystatusKilledDiagnostic, killtime);
goto exit;
} else
-#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_JETSAM && (DEVELOPMENT || DEBUG) */
{
memorystatus_update_jetsam_snapshot_entry_locked(p, kMemorystatusKilledHiwat, killtime);
if (proc_ref_locked(p) == p) {
proc_list_unlock();
- printf("%lu.%02d memorystatus: jetsam killing pid %d [%s] (highwater %d) - memorystatus_available_pages: %d\n",
- (unsigned long)tv_sec, tv_msec, aPid, (*p->p_name ? p->p_name : "(unknown)"), aPid_ep, memorystatus_available_pages);
+ os_log_with_startup_serial(OS_LOG_DEFAULT, "%lu.%03d memorystatus: killing_highwater_process pid %d [%s] (highwater %d) - memorystatus_available_pages: %llu\n",
+ (unsigned long)tv_sec, tv_msec, aPid, (*p->p_name ? p->p_name : "unknown"), aPid_ep, (uint64_t)memorystatus_available_pages);
/*
* memorystatus_do_kill drops a reference, so take another one so we can
proc_list_unlock();
- printf("%lu.%01d memorystatus: elevated%d: jetsam killing pid %d [%s] (%s %d) - memorystatus_available_pages: %d\n",
+ os_log_with_startup_serial(OS_LOG_DEFAULT, "%lu.%03d memorystatus: killing_top_process_elevated%d pid %d [%s] (%s %d) - memorystatus_available_pages: %llu\n",
(unsigned long)tv_sec, tv_msec,
aggr_count,
- aPid, (*p->p_name ? p->p_name : "(unknown)"),
- jetsam_kill_cause_name[cause], aPid_ep, memorystatus_available_pages);
+ aPid, (*p->p_name ? p->p_name : "unknown"),
+ memorystatus_kill_cause_name[cause], aPid_ep, (uint64_t)memorystatus_available_pages);
/*
* memorystatus_do_kill drops a reference, so take another one so we can
* add the appropriate exit reason code mapping.
*/
if ((victim_pid != -1) || (cause != kMemorystatusKilledVMPageShortage && cause != kMemorystatusKilledVMThrashing &&
- cause != kMemorystatusKilledFCThrashing)) {
+ cause != kMemorystatusKilledFCThrashing && cause != kMemorystatusKilledZoneMapExhaustion)) {
return FALSE;
}
return TRUE;
}
-boolean_t
-memorystatus_kill_on_VM_page_shortage(boolean_t async) {
+boolean_t
+memorystatus_kill_on_VM_thrashing(boolean_t async) {
if (async) {
- return memorystatus_kill_process_async(-1, kMemorystatusKilledVMPageShortage);
+ return memorystatus_kill_process_async(-1, kMemorystatusKilledVMThrashing);
} else {
- os_reason_t jetsam_reason = os_reason_create(OS_REASON_JETSAM, JETSAM_REASON_MEMORY_VMPAGESHORTAGE);
+ os_reason_t jetsam_reason = os_reason_create(OS_REASON_JETSAM, JETSAM_REASON_MEMORY_VMTHRASHING);
if (jetsam_reason == OS_REASON_NULL) {
- printf("memorystatus_kill_on_VM_page_shortage -- sync: failed to allocate jetsam reason\n");
+ printf("memorystatus_kill_on_VM_thrashing -- sync: failed to allocate jetsam reason\n");
}
- return memorystatus_kill_process_sync(-1, kMemorystatusKilledVMPageShortage, jetsam_reason);
+ return memorystatus_kill_process_sync(-1, kMemorystatusKilledVMThrashing, jetsam_reason);
}
}
-boolean_t
-memorystatus_kill_on_VM_thrashing(boolean_t async) {
+#if CONFIG_JETSAM
+boolean_t
+memorystatus_kill_on_VM_page_shortage(boolean_t async) {
if (async) {
- return memorystatus_kill_process_async(-1, kMemorystatusKilledVMThrashing);
+ return memorystatus_kill_process_async(-1, kMemorystatusKilledVMPageShortage);
} else {
- os_reason_t jetsam_reason = os_reason_create(OS_REASON_JETSAM, JETSAM_REASON_MEMORY_VMTHRASHING);
+ os_reason_t jetsam_reason = os_reason_create(OS_REASON_JETSAM, JETSAM_REASON_MEMORY_VMPAGESHORTAGE);
if (jetsam_reason == OS_REASON_NULL) {
- printf("memorystatus_kill_on_VM_thrashing -- sync: failed to allocate jetsam reason\n");
+ printf("memorystatus_kill_on_VM_page_shortage -- sync: failed to allocate jetsam reason\n");
}
- return memorystatus_kill_process_sync(-1, kMemorystatusKilledVMThrashing, jetsam_reason);
+ return memorystatus_kill_process_sync(-1, kMemorystatusKilledVMPageShortage, jetsam_reason);
}
}
#endif /* CONFIG_JETSAM */
+boolean_t
+memorystatus_kill_on_zone_map_exhaustion(pid_t pid) {
+ boolean_t res = FALSE;
+ if (pid == -1) {
+ res = memorystatus_kill_process_async(-1, kMemorystatusKilledZoneMapExhaustion);
+ } else {
+ os_reason_t jetsam_reason = os_reason_create(OS_REASON_JETSAM, JETSAM_REASON_ZONE_MAP_EXHAUSTION);
+ if (jetsam_reason == OS_REASON_NULL) {
+ printf("memorystatus_kill_on_zone_map_exhaustion: failed to allocate jetsam reason\n");
+ }
+
+ res = memorystatus_kill_process_sync(pid, kMemorystatusKilledZoneMapExhaustion, jetsam_reason);
+ }
+ return res;
+}
+
#if CONFIG_FREEZE
__private_extern__ void
}
}
}
- lck_mtx_unlock(&freezer_mutex);
+ lck_mtx_unlock(&freezer_mutex);
+
+ assert_wait((event_t) &memorystatus_freeze_wakeup, THREAD_UNINT);
+ thread_block((thread_continue_t) memorystatus_freeze_thread);
+}
+
+static int
+sysctl_memorystatus_do_fastwake_warmup_all SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, req, arg1, arg2)
+
+ /* Need to be root or have entitlement */
+ if (!kauth_cred_issuser(kauth_cred_get()) && !IOTaskHasEntitlement(current_task(), MEMORYSTATUS_ENTITLEMENT)) {
+ return EPERM;
+ }
+
+ if (memorystatus_freeze_enabled == FALSE) {
+ return ENOTSUP;
+ }
- assert_wait((event_t) &memorystatus_freeze_wakeup, THREAD_UNINT);
- thread_block((thread_continue_t) memorystatus_freeze_thread);
+ do_fastwake_warmup_all();
+
+ return 0;
}
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_do_fastwake_warmup_all, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+ 0, 0, &sysctl_memorystatus_do_fastwake_warmup_all, "I", "");
+
#endif /* CONFIG_FREEZE */
#if VM_PRESSURE_EVENTS
}
boolean_t
-memorystatus_warn_process(pid_t pid, boolean_t limit_exceeded) {
+memorystatus_warn_process(pid_t pid, __unused boolean_t is_active, __unused boolean_t is_fatal, boolean_t limit_exceeded) {
boolean_t ret = FALSE;
boolean_t found_knote = FALSE;
struct knote *kn = NULL;
+ int send_knote_count = 0;
/*
* See comment in sysctl_memorystatus_vm_pressure_send.
* filt_memorystatus().
*/
+#if CONFIG_EMBEDDED
if (!limit_exceeded) {
-
/*
- * Processes on desktop are not expecting to handle a system-wide
- * critical or system-wide warning notification from this path.
- * Intentionally set only the unambiguous limit warning here.
+ * Intentionally set either the unambiguous limit warning,
+ * the system-wide critical or the system-wide warning
+ * notification bit.
*/
if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) {
kn->kn_fflags = NOTE_MEMORYSTATUS_PROC_LIMIT_WARN;
found_knote = TRUE;
+ send_knote_count++;
+ } else if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PRESSURE_CRITICAL) {
+ kn->kn_fflags = NOTE_MEMORYSTATUS_PRESSURE_CRITICAL;
+ found_knote = TRUE;
+ send_knote_count++;
+ } else if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PRESSURE_WARN) {
+ kn->kn_fflags = NOTE_MEMORYSTATUS_PRESSURE_WARN;
+ found_knote = TRUE;
+ send_knote_count++;
}
-
} else {
/*
* Send this notification when a process has exceeded a soft limit.
if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL) {
kn->kn_fflags = NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL;
found_knote = TRUE;
+ send_knote_count++;
+ }
+ }
+#else /* CONFIG_EMBEDDED */
+ if (!limit_exceeded) {
+
+ /*
+ * Processes on desktop are not expecting to handle a system-wide
+ * critical or system-wide warning notification from this path.
+ * Intentionally set only the unambiguous limit warning here.
+ *
+ * If the limit is soft, however, limit this to one notification per
+ * active/inactive limit (per each registered listener).
+ */
+
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) {
+ found_knote=TRUE;
+ if (!is_fatal) {
+ /*
+ * Restrict proc_limit_warn notifications when
+ * non-fatal (soft) limit is at play.
+ */
+ if (is_active) {
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_ACTIVE) {
+ /*
+ * Mark this knote for delivery.
+ */
+ kn->kn_fflags = NOTE_MEMORYSTATUS_PROC_LIMIT_WARN;
+ /*
+ * And suppress it from future notifications.
+ */
+ kn->kn_sfflags &= ~NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_ACTIVE;
+ send_knote_count++;
+ }
+ } else {
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_INACTIVE) {
+ /*
+ * Mark this knote for delivery.
+ */
+ kn->kn_fflags = NOTE_MEMORYSTATUS_PROC_LIMIT_WARN;
+ /*
+ * And suppress it from future notifications.
+ */
+ kn->kn_sfflags &= ~NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_INACTIVE;
+ send_knote_count++;
+ }
+ }
+ } else {
+ /*
+ * No restriction on proc_limit_warn notifications when
+ * fatal (hard) limit is at play.
+ */
+ kn->kn_fflags = NOTE_MEMORYSTATUS_PROC_LIMIT_WARN;
+ send_knote_count++;
+ }
+ }
+ } else {
+ /*
+ * Send this notification when a process has exceeded a soft limit,
+ */
+
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL) {
+ found_knote = TRUE;
+ if (!is_fatal) {
+ /*
+ * Restrict critical notifications for soft limits.
+ */
+
+ if (is_active) {
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_ACTIVE) {
+ /*
+ * Suppress future proc_limit_critical notifications
+ * for the active soft limit.
+ */
+ kn->kn_sfflags &= ~NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_ACTIVE;
+ kn->kn_fflags = NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL;
+ send_knote_count++;
+
+ }
+ } else {
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_INACTIVE) {
+ /*
+ * Suppress future proc_limit_critical_notifications
+ * for the inactive soft limit.
+ */
+ kn->kn_sfflags &= ~NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_INACTIVE;
+ kn->kn_fflags = NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL;
+ send_knote_count++;
+ }
+ }
+ } else {
+ /*
+ * We should never be trying to send a critical notification for
+ * a hard limit... the process would be killed before it could be
+ * received.
+ */
+ panic("Caught sending pid %d a critical warning for a fatal limit.\n", pid);
+ }
}
}
+#endif /* CONFIG_EMBEDDED */
}
}
if (found_knote) {
- KNOTE(&memorystatus_klist, 0);
+ if (send_knote_count > 0) {
+ KNOTE(&memorystatus_klist, 0);
+ }
ret = TRUE;
}
/*
* This value is the threshold that a process must meet to be considered for scavenging.
*/
+#if CONFIG_EMBEDDED
+#define VM_PRESSURE_MINIMUM_RSIZE 1 /* MB */
+#else /* CONFIG_EMBEDDED */
#define VM_PRESSURE_MINIMUM_RSIZE 10 /* MB */
+#endif /* CONFIG_EMBEDDED */
#define VM_PRESSURE_NOTIFY_WAIT_PERIOD 10000 /* milliseconds */
pressure_increase = TRUE;
} else {
- if (level >= pressure_snapshot) {
+ if (level && (level >= pressure_snapshot)) {
pressure_increase = TRUE;
} else {
pressure_increase = FALSE;
}
#endif /* CONFIG_MEMORYSTATUS */
+#if CONFIG_EMBEDDED
+ curr_task_importance = p->p_memstat_effectivepriority;
+#else /* CONFIG_EMBEDDED */
curr_task_importance = task_importance_estimate(t);
+#endif /* CONFIG_EMBEDDED */
/*
* Privileged listeners are only considered in the multi-level pressure scheme
if (level_snapshot == kVMPressureWarning || level_snapshot == kVMPressureUrgent) {
- if (curr_ts < next_warning_notification_sent_at_ts) {
- delay(INTER_NOTIFICATION_DELAY * 4 /* 1 sec */);
- return KERN_SUCCESS;
+ if (next_warning_notification_sent_at_ts) {
+ if (curr_ts < next_warning_notification_sent_at_ts) {
+ delay(INTER_NOTIFICATION_DELAY * 4 /* 1 sec */);
+ return KERN_SUCCESS;
+ }
+
+ next_warning_notification_sent_at_ts = 0;
+ memorystatus_klist_reset_all_for_level(kVMPressureWarning);
}
} else if (level_snapshot == kVMPressureCritical) {
- if (curr_ts < next_critical_notification_sent_at_ts) {
- delay(INTER_NOTIFICATION_DELAY * 4 /* 1 sec */);
- return KERN_SUCCESS;
+ if (next_critical_notification_sent_at_ts) {
+ if (curr_ts < next_critical_notification_sent_at_ts) {
+ delay(INTER_NOTIFICATION_DELAY * 4 /* 1 sec */);
+ return KERN_SUCCESS;
+ }
+ next_critical_notification_sent_at_ts = 0;
+ memorystatus_klist_reset_all_for_level(kVMPressureCritical);
}
}
}
if (level_snapshot != kVMPressureNormal) {
if (level_snapshot == kVMPressureWarning || level_snapshot == kVMPressureUrgent) {
nanoseconds_to_absolutetime(WARNING_NOTIFICATION_RESTING_PERIOD * NSEC_PER_SEC, &curr_ts);
- next_warning_notification_sent_at_ts = mach_absolute_time() + curr_ts;
- memorystatus_klist_reset_all_for_level(kVMPressureWarning);
+ /* Next warning notification (if nothing changes) won't be sent before...*/
+ next_warning_notification_sent_at_ts = mach_absolute_time() + curr_ts;
}
if (level_snapshot == kVMPressureCritical) {
nanoseconds_to_absolutetime(CRITICAL_NOTIFICATION_RESTING_PERIOD * NSEC_PER_SEC, &curr_ts);
- next_critical_notification_sent_at_ts = mach_absolute_time() + curr_ts;
- memorystatus_klist_reset_all_for_level(kVMPressureCritical);
+ /* Next critical notification (if nothing changes) won't be sent before...*/
+ next_critical_notification_sent_at_ts = mach_absolute_time() + curr_ts;
}
}
return KERN_FAILURE;
sysctl_memorystatus_vm_pressure_level SYSCTL_HANDLER_ARGS
{
#pragma unused(arg1, arg2, oidp)
+#if CONFIG_EMBEDDED
+ int error = 0;
+
+ error = priv_check_cred(kauth_cred_get(), PRIV_VM_PRESSURE, 0);
+ if (error)
+ return (error);
+
+#endif /* CONFIG_EMBEDDED */
vm_pressure_level_t dispatch_level = convert_internal_pressure_level_to_dispatch_level(memorystatus_vm_pressure_level);
return SYSCTL_OUT(req, &dispatch_level, sizeof(dispatch_level));
list_entry->priority = p->p_memstat_effectivepriority;
list_entry->user_data = p->p_memstat_userdata;
- /*
- * No need to consider P_MEMSTAT_MEMLIMIT_BACKGROUND anymore.
- * Background limits are described via the inactive limit slots.
- * So, here, the cached limit should always be valid.
- */
-
if (p->p_memstat_memlimit <= 0) {
task_get_phys_footprint_limit(p->task, &list_entry->limit);
} else {
}
static int
-memorystatus_cmd_get_priority_list(user_addr_t buffer, size_t buffer_size, int32_t *retval) {
- int error = EINVAL;
+memorystatus_get_priority_pid(pid_t pid, user_addr_t buffer, size_t buffer_size) {
+ int error = 0;
+ memorystatus_priority_entry_t mp_entry;
+
+ /* Validate inputs */
+ if ((pid == 0) || (buffer == USER_ADDR_NULL) || (buffer_size != sizeof(memorystatus_priority_entry_t))) {
+ return EINVAL;
+ }
+
+ proc_t p = proc_find(pid);
+ if (!p) {
+ return ESRCH;
+ }
+
+ memset (&mp_entry, 0, sizeof(memorystatus_priority_entry_t));
+
+ mp_entry.pid = p->p_pid;
+ mp_entry.priority = p->p_memstat_effectivepriority;
+ mp_entry.user_data = p->p_memstat_userdata;
+ if (p->p_memstat_memlimit <= 0) {
+ task_get_phys_footprint_limit(p->task, &mp_entry.limit);
+ } else {
+ mp_entry.limit = p->p_memstat_memlimit;
+ }
+ mp_entry.state = memorystatus_build_state(p);
+
+ proc_rele(p);
+
+ error = copyout(&mp_entry, buffer, buffer_size);
+
+ return (error);
+}
+
+static int
+memorystatus_cmd_get_priority_list(pid_t pid, user_addr_t buffer, size_t buffer_size, int32_t *retval) {
+ int error = 0;
boolean_t size_only;
- memorystatus_priority_entry_t *list = NULL;
size_t list_size;
+
+ /*
+ * When a non-zero pid is provided, the 'list' has only one entry.
+ */
size_only = ((buffer == USER_ADDR_NULL) ? TRUE: FALSE);
-
- error = memorystatus_get_priority_list(&list, &buffer_size, &list_size, size_only);
- if (error) {
- goto out;
- }
- if (!size_only) {
- error = copyout(list, buffer, list_size);
+ if (pid != 0) {
+ list_size = sizeof(memorystatus_priority_entry_t) * 1;
+ if (!size_only) {
+ error = memorystatus_get_priority_pid(pid, buffer, buffer_size);
+ }
+ } else {
+ memorystatus_priority_entry_t *list = NULL;
+ error = memorystatus_get_priority_list(&list, &buffer_size, &list_size, size_only);
+
+ if (error == 0) {
+ if (!size_only) {
+ error = copyout(list, buffer, list_size);
+ }
+ }
+
+ if (list) {
+ kfree(list, buffer_size);
+ }
}
-
+
if (error == 0) {
*retval = list_size;
}
-out:
-
- if (list) {
- kfree(list, buffer_size);
- }
- return error;
+ return (error);
}
-#if CONFIG_JETSAM
-
static void
memorystatus_clear_errors(void)
{
KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_CLEAR_ERRORS) | DBG_FUNC_END, 0, 0, 0, 0, 0);
}
+#if CONFIG_JETSAM
static void
memorystatus_update_levels_locked(boolean_t critical_only) {
memorystatus_available_pages_critical = memorystatus_available_pages_pressure;
}
}
-#endif
+#endif /* DEBUG || DEVELOPMENT */
if (memorystatus_jetsam_policy & kPolicyMoreFree) {
memorystatus_available_pages_critical += memorystatus_policy_more_free_offset_pages;
#endif
}
+
static int
sysctl_kern_memorystatus_policy_more_free SYSCTL_HANDLER_ARGS
{
SYSCTL_PROC(_kern, OID_AUTO, memorystatus_policy_more_free, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED,
0, 0, &sysctl_kern_memorystatus_policy_more_free, "I", "");
+#endif /* CONFIG_JETSAM */
+
/*
* Get the at_boot snapshot
*/
return EPERM;
}
- error = memorystatus_update(p, mpp_entry.priority, mpp_entry.user_data, FALSE, FALSE, 0, 0, FALSE, FALSE, FALSE);
+ error = memorystatus_update(p, mpp_entry.priority, mpp_entry.user_data, FALSE, FALSE, 0, 0, FALSE, FALSE);
proc_rele(p);
}
* - so mapping is (active/fatal, inactive/fatal)
*/
+#if CONFIG_JETSAM
static int
memorystatus_cmd_set_jetsam_memory_limit(pid_t pid, int32_t high_water_mark, __unused int32_t *retval, boolean_t is_fatal_limit) {
int error = 0;
error = memorystatus_set_memlimit_properties(pid, &entry);
return (error);
}
+#endif /* CONFIG_JETSAM */
static int
memorystatus_set_memlimit_properties(pid_t pid, memorystatus_memlimit_properties_t *entry) {
*/
if (memorystatus_highwater_enabled) {
- boolean_t trigger_exception;
- /*
- * No need to consider P_MEMSTAT_MEMLIMIT_BACKGROUND anymore.
- * Background limits are described via the inactive limit slots.
- */
+ boolean_t is_fatal;
+ boolean_t use_active;
if (proc_jetsam_state_is_active_locked(p) == TRUE) {
- CACHE_ACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_ACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = TRUE;
} else {
- CACHE_INACTIVE_LIMITS_LOCKED(p, trigger_exception);
+ CACHE_INACTIVE_LIMITS_LOCKED(p, is_fatal);
+ use_active = FALSE;
}
/* Enforce the limit by writing to the ledgers */
- assert(trigger_exception == TRUE);
- error = (task_set_phys_footprint_limit_internal(p->task, ((p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1), NULL, trigger_exception) == 0) ? 0 : EINVAL;
+ error = (task_set_phys_footprint_limit_internal(p->task, ((p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1), NULL, use_active, is_fatal) == 0) ? 0 : EINVAL;
MEMORYSTATUS_DEBUG(3, "memorystatus_set_memlimit_properties: new limit on pid %d (%dMB %s) current priority (%d) dirty_state?=0x%x %s\n",
p->p_pid, (p->p_memstat_memlimit > 0 ? p->p_memstat_memlimit : -1),
return 0;
}
-#endif /* CONFIG_JETSAM */
-
int
memorystatus_control(struct proc *p __unused, struct memorystatus_control_args *args, int *ret) {
int error = EINVAL;
switch (args->command) {
case MEMORYSTATUS_CMD_GET_PRIORITY_LIST:
- error = memorystatus_cmd_get_priority_list(args->buffer, args->buffersize, ret);
+ error = memorystatus_cmd_get_priority_list(args->pid, args->buffer, args->buffersize, ret);
break;
-#if CONFIG_JETSAM
case MEMORYSTATUS_CMD_SET_PRIORITY_PROPERTIES:
error = memorystatus_cmd_set_priority_properties(args->pid, args->buffer, args->buffersize, ret);
break;
case MEMORYSTATUS_CMD_GET_PRESSURE_STATUS:
error = memorystatus_cmd_get_pressure_status(ret);
break;
+#if CONFIG_JETSAM
case MEMORYSTATUS_CMD_SET_JETSAM_HIGH_WATER_MARK:
/*
* This call does not distinguish between active and inactive limits.
*/
error = memorystatus_cmd_set_jetsam_memory_limit(args->pid, (int32_t)args->flags, ret, TRUE);
break;
+#endif /* CONFIG_JETSAM */
/* Test commands */
#if DEVELOPMENT || DEBUG
case MEMORYSTATUS_CMD_TEST_JETSAM:
case MEMORYSTATUS_CMD_TEST_JETSAM_SORT:
error = memorystatus_cmd_test_jetsam_sort(args->pid, (int32_t)args->flags);
break;
+#if CONFIG_JETSAM
case MEMORYSTATUS_CMD_SET_JETSAM_PANIC_BITS:
error = memorystatus_cmd_set_panic_bits(args->buffer, args->buffersize);
break;
+#endif /* CONFIG_JETSAM */
#else /* DEVELOPMENT || DEBUG */
#pragma unused(jetsam_reason)
#endif /* DEVELOPMENT || DEBUG */
memorystatus_aggressive_jetsam_lenient = FALSE;
error = 0;
break;
-#endif /* CONFIG_JETSAM */
case MEMORYSTATUS_CMD_PRIVILEGED_LISTENER_ENABLE:
case MEMORYSTATUS_CMD_PRIVILEGED_LISTENER_DISABLE:
error = memorystatus_low_mem_privileged_listener(args->command);
break;
-#if CONFIG_JETSAM
case MEMORYSTATUS_CMD_ELEVATED_INACTIVEJETSAMPRIORITY_ENABLE:
case MEMORYSTATUS_CMD_ELEVATED_INACTIVEJETSAMPRIORITY_DISABLE:
error = memorystatus_update_inactive_jetsam_priority_band(args->pid, args->command, args->flags ? TRUE : FALSE);
break;
-#endif /* CONFIG_JETSAM */
default:
break;
static int
-filt_memorystatusattach(struct knote *kn)
+filt_memorystatusattach(struct knote *kn, __unused struct kevent_internal_s *kev)
{
int error;
break;
}
}
-
+
+#if 0
+ if (kn->kn_fflags != 0) {
+ proc_t knote_proc = knote_get_kq(kn)->kq_p;
+ pid_t knote_pid = knote_proc->p_pid;
+
+ printf("filt_memorystatus: sending kn 0x%lx (event 0x%x) for pid (%d)\n",
+ (unsigned long)kn, kn->kn_fflags, knote_pid);
+ }
+#endif
+
return (kn->kn_fflags != 0);
}
filt_memorystatustouch(struct knote *kn, struct kevent_internal_s *kev)
{
int res;
+ int prev_kn_sfflags = 0;
memorystatus_klist_lock();
* copy in new kevent settings
* (saving the "desired" data and fflags).
*/
- kn->kn_sfflags = kev->fflags;
+
+ prev_kn_sfflags = kn->kn_sfflags;
+ kn->kn_sfflags = (kev->fflags & EVFILT_MEMORYSTATUS_ALL_MASK);
+
+#if !CONFIG_EMBEDDED
+ /*
+ * Only on desktop do we restrict notifications to
+ * one per active/inactive state (soft limits only).
+ */
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) {
+ /*
+ * Is there previous state to preserve?
+ */
+ if (prev_kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) {
+ /*
+ * This knote was previously interested in proc_limit_warn,
+ * so yes, preserve previous state.
+ */
+ if (prev_kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_ACTIVE) {
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_ACTIVE;
+ }
+ if (prev_kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_INACTIVE) {
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_INACTIVE;
+ }
+ } else {
+ /*
+ * This knote was not previously interested in proc_limit_warn,
+ * but it is now. Set both states.
+ */
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_ACTIVE;
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_INACTIVE;
+ }
+ }
+
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL) {
+ /*
+ * Is there previous state to preserve?
+ */
+ if (prev_kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL) {
+ /*
+ * This knote was previously interested in proc_limit_critical,
+ * so yes, preserve previous state.
+ */
+ if (prev_kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_ACTIVE) {
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_ACTIVE;
+ }
+ if (prev_kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_INACTIVE) {
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_INACTIVE;
+ }
+ } else {
+ /*
+ * This knote was not previously interested in proc_limit_critical,
+ * but it is now. Set both states.
+ */
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_ACTIVE;
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_INACTIVE;
+ }
+ }
+#endif /* !CONFIG_EMBEDDED */
if ((kn->kn_status & KN_UDATA_SPECIFIC) == 0)
kn->kn_udata = kev->udata;
int
memorystatus_knote_register(struct knote *kn) {
int error = 0;
-
+
memorystatus_klist_lock();
-
- if (kn->kn_sfflags & (NOTE_MEMORYSTATUS_PRESSURE_NORMAL | NOTE_MEMORYSTATUS_PRESSURE_WARN |
- NOTE_MEMORYSTATUS_PRESSURE_CRITICAL | NOTE_MEMORYSTATUS_LOW_SWAP |
- NOTE_MEMORYSTATUS_PROC_LIMIT_WARN | NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL)) {
+
+ /*
+ * Support only userspace visible flags.
+ */
+ if ((kn->kn_sfflags & EVFILT_MEMORYSTATUS_ALL_MASK) == (unsigned int) kn->kn_sfflags) {
+
+#if !CONFIG_EMBEDDED
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_WARN) {
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_ACTIVE;
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_WARN_INACTIVE;
+ }
+
+ if (kn->kn_sfflags & NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL) {
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_ACTIVE;
+ kn->kn_sfflags |= NOTE_MEMORYSTATUS_PROC_LIMIT_CRITICAL_INACTIVE;
+ }
+#endif /* !CONFIG_EMBEDDED */
KNOTE_ATTACH(&memorystatus_klist, kn);
#endif /* CONFIG_JETSAM && VM_PRESSURE_EVENTS */
#endif /* 0 */
-#if CONFIG_JETSAM
/* Coalition support */
/* sorting info for a particular priority bucket */
}
return(found_pids);
}
-#endif /* CONFIG_JETSAM */
+
+int
+memorystatus_get_proccnt_upto_priority(int32_t max_bucket_index)
+{
+ int32_t i = JETSAM_PRIORITY_IDLE;
+ int count = 0;
+
+ if (max_bucket_index >= MEMSTAT_BUCKET_COUNT) {
+ return(-1);
+ }
+
+ while(i <= max_bucket_index) {
+ count += memstat_bucket[i++].count;
+ }
+
+ return count;
+}
+
+int
+memorystatus_update_priority_for_appnap(proc_t p, boolean_t is_appnap)
+{
+#if !CONFIG_JETSAM
+ if (!p || (!isApp(p)) || (p->p_memstat_state & P_MEMSTAT_INTERNAL)) {
+ /*
+ * Ineligible processes OR system processes e.g. launchd.
+ */
+ return -1;
+ }
+
+ /*
+ * For macOS only:
+ * We would like to use memorystatus_update() here to move the processes
+ * within the bands. Unfortunately memorystatus_update() calls
+ * memorystatus_update_priority_locked() which uses any band transitions
+ * as an indication to modify ledgers. For that it needs the task lock
+ * and since we came into this function with the task lock held, we'll deadlock.
+ *
+ * Unfortunately we can't completely disable ledger updates because we still
+ * need the ledger updates for a subset of processes i.e. daemons.
+ * When all processes on all platforms support memory limits, we can simply call
+ * memorystatus_update().
+
+ * It also has some logic to deal with 'aging' which, currently, is only applicable
+ * on CONFIG_JETSAM configs. So, till every platform has CONFIG_JETSAM we'll need
+ * to do this explicit band transition.
+ */
+
+ memstat_bucket_t *current_bucket, *new_bucket;
+ int32_t priority = 0;
+
+ proc_list_lock();
+
+ if (((p->p_listflag & P_LIST_EXITED) != 0) ||
+ (p->p_memstat_state & (P_MEMSTAT_ERROR | P_MEMSTAT_TERMINATED))) {
+ /*
+ * If the process is on its way out OR
+ * jetsam has alread tried and failed to kill this process,
+ * let's skip the whole jetsam band transition.
+ */
+ proc_list_unlock();
+ return(0);
+ }
+
+ if (is_appnap) {
+ current_bucket = &memstat_bucket[p->p_memstat_effectivepriority];
+ new_bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
+ priority = JETSAM_PRIORITY_IDLE;
+ } else {
+ if (p->p_memstat_effectivepriority != JETSAM_PRIORITY_IDLE) {
+ /*
+ * It is possible that someone pulled this process
+ * out of the IDLE band without updating its app-nap
+ * parameters.
+ */
+ proc_list_unlock();
+ return (0);
+ }
+
+ current_bucket = &memstat_bucket[JETSAM_PRIORITY_IDLE];
+ new_bucket = &memstat_bucket[p->p_memstat_requestedpriority];
+ priority = p->p_memstat_requestedpriority;
+ }
+
+ TAILQ_REMOVE(¤t_bucket->list, p, p_memstat_list);
+ current_bucket->count--;
+
+ TAILQ_INSERT_TAIL(&new_bucket->list, p, p_memstat_list);
+ new_bucket->count++;
+
+ /*
+ * Record idle start or idle delta.
+ */
+ if (p->p_memstat_effectivepriority == priority) {
+ /*
+ * This process is not transitioning between
+ * jetsam priority buckets. Do nothing.
+ */
+ } else if (p->p_memstat_effectivepriority == JETSAM_PRIORITY_IDLE) {
+ uint64_t now;
+ /*
+ * Transitioning out of the idle priority bucket.
+ * Record idle delta.
+ */
+ assert(p->p_memstat_idle_start != 0);
+ now = mach_absolute_time();
+ if (now > p->p_memstat_idle_start) {
+ p->p_memstat_idle_delta = now - p->p_memstat_idle_start;
+ }
+ } else if (priority == JETSAM_PRIORITY_IDLE) {
+ /*
+ * Transitioning into the idle priority bucket.
+ * Record idle start.
+ */
+ p->p_memstat_idle_start = mach_absolute_time();
+ }
+
+ p->p_memstat_effectivepriority = priority;
+
+ proc_list_unlock();
+
+ return (0);
+
+#else /* !CONFIG_JETSAM */
+ #pragma unused(p)
+ #pragma unused(is_appnap)
+ return -1;
+#endif /* !CONFIG_JETSAM */
+}
projects / apple / xnu.git / blobdiff