*
*/
-#include <sys/kern_event.h>
-#include <sys/kern_memorystatus.h>
-
#include <kern/sched_prim.h>
+#include <kern/kalloc.h>
+#include <kern/assert.h>
+#include <kern/debug.h>
#include <kern/lock.h>
#include <kern/task.h>
#include <kern/thread.h>
+#include <kern/host.h>
#include <libkern/libkern.h>
+#include <mach/mach_time.h>
#include <mach/task.h>
#include <mach/task_info.h>
+#include <mach/host_priv.h>
+#include <sys/kern_event.h>
#include <sys/proc.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
+#include <sys/sysproto.h>
#include <sys/wait.h>
+#include <sys/tree.h>
+#include <sys/priv.h>
+#include <pexpert/pexpert.h>
+
+#if CONFIG_FREEZE
+#include <vm/vm_protos.h>
+#include <vm/vm_map.h>
+#endif
+
+#include <sys/kern_memorystatus.h>
+
+/* These are very verbose printfs(), enable with
+ * MEMORYSTATUS_DEBUG_LOG
+ */
+#if MEMORYSTATUS_DEBUG_LOG
+#define MEMORYSTATUS_DEBUG(cond, format, ...) \
+do { \
+ if (cond) { printf(format, ##__VA_ARGS__); } \
+} while(0)
+#else
+#define MEMORYSTATUS_DEBUG(cond, format, ...)
+#endif
+
+/* General memorystatus stuff */
+
+static void memorystatus_add_node(memorystatus_node *node);
+static void memorystatus_remove_node(memorystatus_node *node);
+static memorystatus_node *memorystatus_get_node(pid_t pid);
+static void memorystatus_release_node(memorystatus_node *node);
+
+int memorystatus_wakeup = 0;
+
+static void memorystatus_thread(void *param __unused, wait_result_t wr __unused);
+
+static memorystatus_node *next_memorystatus_node = NULL;
+
+static int memorystatus_list_count = 0;
+
+static lck_mtx_t * memorystatus_list_mlock;
+static lck_attr_t * memorystatus_lck_attr;
+static lck_grp_t * memorystatus_lck_grp;
+static lck_grp_attr_t * memorystatus_lck_grp_attr;
+
+static TAILQ_HEAD(memorystatus_list_head, memorystatus_node) memorystatus_list;
+
+static uint64_t memorystatus_idle_delay_time = 0;
+
+static unsigned int memorystatus_dirty_count = 0;
+
+extern void proc_dirty_start(struct proc *p);
+extern void proc_dirty_end(struct proc *p);
+
+/* Jetsam */
+
+#if CONFIG_JETSAM
+
+extern unsigned int vm_page_free_count;
+extern unsigned int vm_page_active_count;
+extern unsigned int vm_page_inactive_count;
+extern unsigned int vm_page_throttled_count;
+extern unsigned int vm_page_purgeable_count;
+extern unsigned int vm_page_wire_count;
+
+static lck_mtx_t * exit_list_mlock;
+
+static TAILQ_HEAD(exit_list_head, memorystatus_node) exit_list;
+
+static unsigned int memorystatus_kev_failure_count = 0;
+
+/* Counted in pages... */
+unsigned int memorystatus_delta = 0;
+
+unsigned int memorystatus_available_pages = (unsigned int)-1;
+unsigned int memorystatus_available_pages_critical = 0;
+unsigned int memorystatus_available_pages_highwater = 0;
+
+/* ...with the exception of the legacy level in percent. */
+unsigned int memorystatus_level = 0;
+
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_kev_failure_count, CTLFLAG_RD, &memorystatus_kev_failure_count, 0, "");
+SYSCTL_INT(_kern, OID_AUTO, memorystatus_level, CTLFLAG_RD, &memorystatus_level, 0, "");
+
+unsigned int memorystatus_jetsam_policy = kPolicyDefault;
+
+unsigned int memorystatus_jetsam_policy_offset_pages_more_free = 0;
+#if DEVELOPMENT || DEBUG
+unsigned int memorystatus_jetsam_policy_offset_pages_diagnostic = 0;
+#endif
+
+static memorystatus_jetsam_snapshot_t memorystatus_jetsam_snapshot;
+#define memorystatus_jetsam_snapshot_list memorystatus_jetsam_snapshot.entries
+
+static int memorystatus_jetsam_snapshot_list_count = 0;
+
+int memorystatus_jetsam_wakeup = 0;
+unsigned int memorystatus_jetsam_running = 1;
+
+static uint32_t memorystatus_task_page_count(task_t task);
+
+static void memorystatus_move_node_to_exit_list(memorystatus_node *node);
+
+static void memorystatus_update_levels_locked(void);
+
+static void memorystatus_jetsam_thread_block(void);
+static void memorystatus_jetsam_thread(void *param __unused, wait_result_t wr __unused);
+
+static int memorystatus_send_note(int event_code, void *data, size_t data_length);
+
+static uint32_t memorystatus_build_flags_from_state(uint32_t state);
+
+/* VM pressure */
+
+#if VM_PRESSURE_EVENTS
+
+typedef enum vm_pressure_level {
+ kVMPressureNormal = 0,
+ kVMPressureWarning = 1,
+ kVMPressureUrgent = 2,
+ kVMPressureCritical = 3,
+} vm_pressure_level_t;
+
+static vm_pressure_level_t memorystatus_vm_pressure_level = kVMPressureNormal;
+
+unsigned int memorystatus_available_pages_pressure = 0;
+
+static inline boolean_t memorystatus_get_pressure_locked(void);
+static void memorystatus_check_pressure_reset(void);
+
+#endif /* VM_PRESSURE_EVENTS */
+
+#endif /* CONFIG_JETSAM */
+
+/* Freeze */
+
+#if CONFIG_FREEZE
+
+static unsigned int memorystatus_suspended_resident_count = 0;
+static unsigned int memorystatus_suspended_count = 0;
+
+boolean_t memorystatus_freeze_enabled = FALSE;
+int memorystatus_freeze_wakeup = 0;
+
+static inline boolean_t memorystatus_can_freeze_processes(void);
+static boolean_t memorystatus_can_freeze(boolean_t *memorystatus_freeze_swap_low);
+
+static void memorystatus_freeze_thread(void *param __unused, wait_result_t wr __unused);
+
+/* Thresholds */
+static unsigned int memorystatus_freeze_threshold = 0;
+
+static unsigned int memorystatus_freeze_pages_min = FREEZE_PAGES_MIN;
+static unsigned int memorystatus_freeze_pages_max = FREEZE_PAGES_MAX;
+
+static unsigned int memorystatus_frozen_count = 0;
+
+static unsigned int memorystatus_freeze_suspended_threshold = FREEZE_SUSPENDED_THRESHOLD_DEFAULT;
+
+/* Stats */
+static uint64_t memorystatus_freeze_count = 0;
+static uint64_t memorystatus_freeze_pageouts = 0;
+
+/* Throttling */
+static throttle_interval_t throttle_intervals[] = {
+ { 60, 8, 0, 0, { 0, 0 }, FALSE }, /* 1 hour intermediate interval, 8x burst */
+ { 24 * 60, 1, 0, 0, { 0, 0 }, FALSE }, /* 24 hour long interval, no burst */
+};
+
+static uint64_t memorystatus_freeze_throttle_count = 0;
+
+#endif /* CONFIG_FREEZE */
+
+#if CONFIG_JETSAM
+
+/* Debug */
+
+#if DEVELOPMENT || DEBUG
+
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages, CTLFLAG_RD, &memorystatus_available_pages, 0, "");
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages_critical, CTLFLAG_RW, &memorystatus_available_pages_critical, 0, "");
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages_highwater, CTLFLAG_RW, &memorystatus_available_pages_highwater, 0, "");
+#if VM_PRESSURE_EVENTS
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_available_pages_pressure, CTLFLAG_RW, &memorystatus_available_pages_pressure, 0, "");
+#endif /* VM_PRESSURE_EVENTS */
+
+/* Diagnostic code */
+enum {
+ kJetsamDiagnosticModeNone = 0,
+ kJetsamDiagnosticModeAll = 1,
+ kJetsamDiagnosticModeStopAtFirstActive = 2,
+ kJetsamDiagnosticModeCount
+} jetsam_diagnostic_mode = kJetsamDiagnosticModeNone;
+
+static int jetsam_diagnostic_suspended_one_active_proc = 0;
+
+static int
+sysctl_jetsam_diagnostic_mode SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+
+ const char *diagnosticStrings[] = {
+ "jetsam: diagnostic mode: resetting critical level.",
+ "jetsam: diagnostic mode: will examine all processes",
+ "jetsam: diagnostic mode: will stop at first active process"
+ };
+
+ int error, val = jetsam_diagnostic_mode;
+ boolean_t changed = FALSE;
+
+ error = sysctl_handle_int(oidp, &val, 0, req);
+ if (error || !req->newptr)
+ return (error);
+ if ((val < 0) || (val >= kJetsamDiagnosticModeCount)) {
+ printf("jetsam: diagnostic mode: invalid value - %d\n", val);
+ return EINVAL;
+ }
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ if ((unsigned int) val != jetsam_diagnostic_mode) {
+ jetsam_diagnostic_mode = val;
+
+ memorystatus_jetsam_policy &= ~kPolicyDiagnoseActive;
+
+ switch (jetsam_diagnostic_mode) {
+ case kJetsamDiagnosticModeNone:
+ /* Already cleared */
+ break;
+ case kJetsamDiagnosticModeAll:
+ memorystatus_jetsam_policy |= kPolicyDiagnoseAll;
+ break;
+ case kJetsamDiagnosticModeStopAtFirstActive:
+ memorystatus_jetsam_policy |= kPolicyDiagnoseFirst;
+ break;
+ default:
+ /* Already validated */
+ break;
+ }
+
+ memorystatus_update_levels_locked();
+ changed = TRUE;
+ }
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ if (changed) {
+ printf("%s\n", diagnosticStrings[val]);
+ }
+
+ return (0);
+}
+
+SYSCTL_PROC(_debug, OID_AUTO, jetsam_diagnostic_mode, CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_ANYBODY,
+ &jetsam_diagnostic_mode, 0, sysctl_jetsam_diagnostic_mode, "I", "Jetsam Diagnostic Mode");
+
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_jetsam_policy_offset_pages_more_free, CTLFLAG_RW, &memorystatus_jetsam_policy_offset_pages_more_free, 0, "");
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_jetsam_policy_offset_pages_diagnostic, CTLFLAG_RW, &memorystatus_jetsam_policy_offset_pages_diagnostic, 0, "");
+
+#if VM_PRESSURE_EVENTS
+
+#include "vm_pressure.h"
+
+static int
+sysctl_memorystatus_vm_pressure_level SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2, oidp)
+ int error = 0;
+
+ error = priv_check_cred(kauth_cred_get(), PRIV_VM_PRESSURE, 0);
+ if (error)
+ return (error);
+
+ return SYSCTL_OUT(req, &memorystatus_vm_pressure_level, sizeof(memorystatus_vm_pressure_level));
+}
+
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_vm_pressure_level, CTLTYPE_INT|CTLFLAG_RD|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+ 0, 0, &sysctl_memorystatus_vm_pressure_level, "I", "");
+
+static int
+sysctl_memorystatus_vm_pressure_send SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+
+ int error, pid = 0;
+
+ error = sysctl_handle_int(oidp, &pid, 0, req);
+ if (error || !req->newptr)
+ return (error);
+
+ if (vm_dispatch_pressure_note_to_pid(pid)) {
+ return 0;
+ }
+
+ return EINVAL;
+}
+
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_vm_pressure_send, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+ 0, 0, &sysctl_memorystatus_vm_pressure_send, "I", "");
+
+#endif /* VM_PRESSURE_EVENTS */
+
+#endif /* CONFIG_JETSAM */
+
+#if CONFIG_FREEZE
+
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_freeze_threshold, CTLFLAG_RW, &memorystatus_freeze_threshold, 0, "");
+
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_freeze_pages_min, CTLFLAG_RW, &memorystatus_freeze_pages_min, 0, "");
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_freeze_pages_max, CTLFLAG_RW, &memorystatus_freeze_pages_max, 0, "");
+
+SYSCTL_QUAD(_kern, OID_AUTO, memorystatus_freeze_count, CTLFLAG_RD, &memorystatus_freeze_count, "");
+SYSCTL_QUAD(_kern, OID_AUTO, memorystatus_freeze_pageouts, CTLFLAG_RD, &memorystatus_freeze_pageouts, "");
+SYSCTL_QUAD(_kern, OID_AUTO, memorystatus_freeze_throttle_count, CTLFLAG_RD, &memorystatus_freeze_throttle_count, "");
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_freeze_min_processes, CTLFLAG_RW, &memorystatus_freeze_suspended_threshold, 0, "");
+
+boolean_t memorystatus_freeze_throttle_enabled = TRUE;
+SYSCTL_UINT(_kern, OID_AUTO, memorystatus_freeze_throttle_enabled, CTLFLAG_RW, &memorystatus_freeze_throttle_enabled, 0, "");
+
+/*
+ * Manual trigger of freeze and thaw for dev / debug kernels only.
+ */
+static int
+sysctl_memorystatus_freeze SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+
+ int error, pid = 0;
+ proc_t p;
+
+ error = sysctl_handle_int(oidp, &pid, 0, req);
+ if (error || !req->newptr)
+ return (error);
+
+ p = proc_find(pid);
+ if (p != NULL) {
+ uint32_t purgeable, wired, clean, dirty;
+ boolean_t shared;
+ uint32_t max_pages = MIN(default_pager_swap_pages_free(), memorystatus_freeze_pages_max);
+ task_freeze(p->task, &purgeable, &wired, &clean, &dirty, max_pages, &shared, FALSE);
+ proc_rele(p);
+ return 0;
+ }
+
+ return EINVAL;
+}
+
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_freeze, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+ 0, 0, &sysctl_memorystatus_freeze, "I", "");
+
+static int
+sysctl_memorystatus_available_pages_thaw SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2)
+
+ int error, pid = 0;
+ proc_t p;
+
+ error = sysctl_handle_int(oidp, &pid, 0, req);
+ if (error || !req->newptr)
+ return (error);
+
+ p = proc_find(pid);
+ if (p != NULL) {
+ task_thaw(p->task);
+ proc_rele(p);
+ return 0;
+ }
+
+ return EINVAL;
+}
+
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_thaw, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+ 0, 0, &sysctl_memorystatus_available_pages_thaw, "I", "");
+
+#endif /* CONFIG_FREEZE */
+
+#endif /* DEVELOPMENT || DEBUG */
+
+__private_extern__ void
+memorystatus_init(void)
+{
+ thread_t thread = THREAD_NULL;
+ kern_return_t result;
+
+ memorystatus_lck_attr = lck_attr_alloc_init();
+ memorystatus_lck_grp_attr = lck_grp_attr_alloc_init();
+ memorystatus_lck_grp = lck_grp_alloc_init("memorystatus", memorystatus_lck_grp_attr);
+ memorystatus_list_mlock = lck_mtx_alloc_init(memorystatus_lck_grp, memorystatus_lck_attr);
+ TAILQ_INIT(&memorystatus_list);
+
+#if CONFIG_JETSAM
+ exit_list_mlock = lck_mtx_alloc_init(memorystatus_lck_grp, memorystatus_lck_attr);
+ TAILQ_INIT(&exit_list);
+
+ memorystatus_delta = DELTA_PERCENT * atop_64(max_mem) / 100;
+#endif
+
+#if CONFIG_FREEZE
+ memorystatus_freeze_threshold = (FREEZE_PERCENT / DELTA_PERCENT) * memorystatus_delta;
+#endif
+
+ nanoseconds_to_absolutetime((uint64_t)IDLE_EXIT_TIME_SECS * NSEC_PER_SEC, &memorystatus_idle_delay_time);
+
+ result = kernel_thread_start(memorystatus_thread, NULL, &thread);
+ if (result == KERN_SUCCESS) {
+ thread_deallocate(thread);
+ } else {
+ panic("Could not create memorystatus_thread");
+ }
+
+#if CONFIG_JETSAM
+ memorystatus_jetsam_policy_offset_pages_more_free = (POLICY_MORE_FREE_OFFSET_PERCENT / DELTA_PERCENT) * memorystatus_delta;
+#if DEVELOPMENT || DEBUG
+ memorystatus_jetsam_policy_offset_pages_diagnostic = (POLICY_DIAGNOSTIC_OFFSET_PERCENT / DELTA_PERCENT) * memorystatus_delta;
+#endif
+
+ /* No contention at this point */
+ memorystatus_update_levels_locked();
+
+ result = kernel_thread_start(memorystatus_jetsam_thread, NULL, &thread);
+ if (result == KERN_SUCCESS) {
+ thread_deallocate(thread);
+ } else {
+ panic("Could not create memorystatus_jetsam_thread");
+ }
+#endif
+}
+
+/*
+ * Node manipulation
+ */
+
+static void
+memorystatus_add_node(memorystatus_node *new_node)
+{
+ memorystatus_node *node;
+
+ /* Make sure we're called with the list lock held */
+ lck_mtx_assert(memorystatus_list_mlock, LCK_MTX_ASSERT_OWNED);
+
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ if (node->priority <= new_node->priority) {
+ break;
+ }
+ }
+
+ if (node) {
+ TAILQ_INSERT_BEFORE(node, new_node, link);
+ } else {
+ TAILQ_INSERT_TAIL(&memorystatus_list, new_node, link);
+ }
+
+ next_memorystatus_node = TAILQ_FIRST(&memorystatus_list);
+
+ memorystatus_list_count++;
+}
+
+static void
+memorystatus_remove_node(memorystatus_node *node)
+{
+ /* Make sure we're called with the list lock held */
+ lck_mtx_assert(memorystatus_list_mlock, LCK_MTX_ASSERT_OWNED);
+
+ TAILQ_REMOVE(&memorystatus_list, node, link);
+ next_memorystatus_node = TAILQ_FIRST(&memorystatus_list);
+
+#if CONFIG_FREEZE
+ if (node->state & (kProcessFrozen)) {
+ memorystatus_frozen_count--;
+ }
+
+ if (node->state & kProcessSuspended) {
+ memorystatus_suspended_resident_count -= node->resident_pages;
+ memorystatus_suspended_count--;
+ }
+#endif
+
+ memorystatus_list_count--;
+}
+
+/* Returns with the lock taken if found */
+static memorystatus_node *
+memorystatus_get_node(pid_t pid)
+{
+ memorystatus_node *node;
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ if (node->pid == pid) {
+ break;
+ }
+ }
+
+ if (!node) {
+ lck_mtx_unlock(memorystatus_list_mlock);
+ }
+
+ return node;
+}
+
+static void
+memorystatus_release_node(memorystatus_node *node)
+{
+#pragma unused(node)
+ lck_mtx_unlock(memorystatus_list_mlock);
+}
+
+/*
+ * List manipulation
+ */
+
+kern_return_t
+memorystatus_list_add(pid_t pid, int priority, int high_water_mark)
+{
+
+#if !CONFIG_JETSAM
+#pragma unused(high_water_mark)
+#endif
+
+ memorystatus_node *new_node;
+
+ new_node = (memorystatus_node*)kalloc(sizeof(memorystatus_node));
+ if (!new_node) {
+ assert(FALSE);
+ }
+ memset(new_node, 0, sizeof(memorystatus_node));
+
+ MEMORYSTATUS_DEBUG(1, "memorystatus_list_add: adding process %d with priority %d, high water mark %d.\n", pid, priority, high_water_mark);
+
+ new_node->pid = pid;
+ new_node->priority = priority;
+#if CONFIG_JETSAM
+ new_node->hiwat_pages = high_water_mark;
+#endif
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ memorystatus_add_node(new_node);
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ return KERN_SUCCESS;
+}
+
+kern_return_t
+memorystatus_list_change(boolean_t effective, pid_t pid, int priority, int state_flags, int high_water_mark)
+{
+
+#if !CONFIG_JETSAM
+#pragma unused(high_water_mark)
+#endif
+
+ kern_return_t ret;
+ memorystatus_node *node, *search;
+
+ MEMORYSTATUS_DEBUG(1, "memorystatus_list_change: changing process %d to priority %d with flags %d\n", pid, priority, state_flags);
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ if (node->pid == pid) {
+ break;
+ }
+ }
+
+ if (!node) {
+ ret = KERN_FAILURE;
+ goto out;
+ }
+
+ if (effective && (node->state & kProcessPriorityUpdated)) {
+ MEMORYSTATUS_DEBUG(1, "memorystatus_list_change: effective change specified for pid %d, but change already occurred.\n", pid);
+ ret = KERN_FAILURE;
+ goto out;
+ }
+
+ node->state |= kProcessPriorityUpdated;
+
+ if (state_flags != -1) {
+ node->state &= ~(kProcessActive|kProcessForeground);
+ if (state_flags & kMemorystatusFlagsFrontmost) {
+ node->state |= kProcessForeground;
+ }
+ if (state_flags & kMemorystatusFlagsActive) {
+ node->state |= kProcessActive;
+ }
+ }
+
+#if CONFIG_JETSAM
+ if (high_water_mark != -1) {
+ node->hiwat_pages = high_water_mark;
+ }
+#endif
+
+ if (node->priority == priority) {
+ /* Priority unchanged */
+ MEMORYSTATUS_DEBUG(1, "memorystatus_list_change: same priority set for pid %d\n", pid);
+ ret = KERN_SUCCESS;
+ goto out;
+ }
+
+ if (node->priority < priority) {
+ /* Higher priority value (ie less important) - search backwards */
+ search = TAILQ_PREV(node, memorystatus_list_head, link);
+ TAILQ_REMOVE(&memorystatus_list, node, link);
+
+ node->priority = priority;
+ while (search && (search->priority <= node->priority)) {
+ search = TAILQ_PREV(search, memorystatus_list_head, link);
+ }
+ if (search) {
+ TAILQ_INSERT_AFTER(&memorystatus_list, search, node, link);
+ } else {
+ TAILQ_INSERT_HEAD(&memorystatus_list, node, link);
+ }
+ } else {
+ /* Lower priority value (ie more important) - search forwards */
+ search = TAILQ_NEXT(node, link);
+ TAILQ_REMOVE(&memorystatus_list, node, link);
+
+ node->priority = priority;
+ while (search && (search->priority >= node->priority)) {
+ search = TAILQ_NEXT(search, link);
+ }
+ if (search) {
+ TAILQ_INSERT_BEFORE(search, node, link);
+ } else {
+ TAILQ_INSERT_TAIL(&memorystatus_list, node, link);
+ }
+ }
+
+ next_memorystatus_node = TAILQ_FIRST(&memorystatus_list);
+ ret = KERN_SUCCESS;
+
+out:
+ lck_mtx_unlock(memorystatus_list_mlock);
+ return ret;
+}
+
+kern_return_t memorystatus_list_remove(pid_t pid)
+{
+ kern_return_t ret;
+ memorystatus_node *node = NULL;
+
+ MEMORYSTATUS_DEBUG(1, "memorystatus_list_remove: removing process %d\n", pid);
+
+#if CONFIG_JETSAM
+ /* Did we mark this as a exited process? */
+ lck_mtx_lock(exit_list_mlock);
+
+ TAILQ_FOREACH(node, &exit_list, link) {
+ if (node->pid == pid) {
+ /* We did, so remove it from the list. The stats were updated when the queues were shifted. */
+ TAILQ_REMOVE(&exit_list, node, link);
+ break;
+ }
+ }
+
+ lck_mtx_unlock(exit_list_mlock);
+#endif
+
+ /* If not, search the main list */
+ if (!node) {
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ if (node->pid == pid) {
+ /* Remove from the list, and update accounting accordingly */
+ memorystatus_remove_node(node);
+ break;
+ }
+ }
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+ }
+
+ if (node) {
+ kfree(node, sizeof(memorystatus_node));
+ ret = KERN_SUCCESS;
+ } else {
+ ret = KERN_FAILURE;
+ }
+
+ return ret;
+}
+
+kern_return_t
+memorystatus_on_track_dirty(int pid, boolean_t track)
+{
+ kern_return_t ret = KERN_FAILURE;
+ memorystatus_node *node;
+
+ node = memorystatus_get_node((pid_t)pid);
+ if (!node) {
+ return KERN_FAILURE;
+ }
+
+ if (track & !(node->state & kProcessSupportsIdleExit)) {
+ node->state |= kProcessSupportsIdleExit;
+ node->clean_time = mach_absolute_time() + memorystatus_idle_delay_time;
+ ret = KERN_SUCCESS;
+ } else if (!track & (node->state & kProcessSupportsIdleExit)) {
+ node->state &= ~kProcessSupportsIdleExit;
+ node->clean_time = 0;
+ ret = KERN_SUCCESS;
+ }
+
+ memorystatus_release_node(node);
+
+ return ret;
+}
+
+kern_return_t
+memorystatus_on_dirty(int pid, boolean_t dirty)
+{
+ kern_return_t ret = KERN_FAILURE;
+ memorystatus_node *node;
+
+ node = memorystatus_get_node((pid_t)pid);
+ if (!node) {
+ return KERN_FAILURE;
+ }
+
+ if (dirty) {
+ if (!(node->state & kProcessDirty)) {
+ node->state |= kProcessDirty;
+ node->clean_time = 0;
+ memorystatus_dirty_count++;
+ ret = KERN_SUCCESS;
+ }
+ } else {
+ if (node->state & kProcessDirty) {
+ node->state &= ~kProcessDirty;
+ node->clean_time = mach_absolute_time() + memorystatus_idle_delay_time;
+ memorystatus_dirty_count--;
+ ret = KERN_SUCCESS;
+ }
+ }
+
+ memorystatus_release_node(node);
+
+ return ret;
+}
+
+void
+memorystatus_on_suspend(int pid)
+{
+ memorystatus_node *node = memorystatus_get_node((pid_t)pid);
+
+ if (node) {
+#if CONFIG_FREEZE
+ proc_t p;
+
+ p = proc_find(pid);
+ if (p != NULL) {
+ uint32_t pages = memorystatus_task_page_count(p->task);
+ proc_rele(p);
+ node->resident_pages = pages;
+ memorystatus_suspended_resident_count += pages;
+ }
+ memorystatus_suspended_count++;
+#endif
-extern unsigned int vm_page_free_count;
-extern unsigned int vm_page_active_count;
-extern unsigned int vm_page_inactive_count;
-extern unsigned int vm_page_purgeable_count;
-extern unsigned int vm_page_wire_count;
+ node->state |= kProcessSuspended;
-static void kern_memorystatus_thread(void);
+ memorystatus_release_node(node);
+ }
+}
-int kern_memorystatus_wakeup = 0;
-int kern_memorystatus_level = 0;
-int kern_memorystatus_last_level = 0;
-unsigned int kern_memorystatus_kev_failure_count = 0;
-int kern_memorystatus_level_critical = 5;
+void
+memorystatus_on_resume(int pid)
+{
+ memorystatus_node *node = memorystatus_get_node((pid_t)pid);
-static struct {
- jetsam_kernel_stats_t stats;
- size_t entry_count;
- jetsam_snapshot_entry_t entries[kMaxSnapshotEntries];
-} jetsam_snapshot;
+ if (node) {
+#if CONFIG_FREEZE
+ boolean_t frozen = (node->state & kProcessFrozen);
+ if (node->state & (kProcessFrozen)) {
+ memorystatus_frozen_count--;
+ }
+ memorystatus_suspended_resident_count -= node->resident_pages;
+ memorystatus_suspended_count--;
+#endif
-static jetsam_priority_entry_t jetsam_priority_list[kMaxPriorityEntries];
-#define jetsam_snapshot_list jetsam_snapshot.entries
+ node->state &= ~(kProcessSuspended | kProcessFrozen | kProcessIgnored);
-static int jetsam_priority_list_index = 0;
-static int jetsam_priority_list_count = 0;
-static int jetsam_snapshot_list_count = 0;
+ memorystatus_release_node(node);
-static lck_mtx_t * jetsam_list_mlock;
-static lck_attr_t * jetsam_lck_attr;
-static lck_grp_t * jetsam_lck_grp;
-static lck_grp_attr_t * jetsam_lck_grp_attr;
+#if CONFIG_FREEZE
+ if (frozen) {
+ memorystatus_freeze_entry_t data = { pid, kMemorystatusFlagsThawed, 0 };
+ memorystatus_send_note(kMemorystatusFreezeNote, &data, sizeof(data));
+ }
+#endif
+ }
+}
-SYSCTL_INT(_kern, OID_AUTO, memorystatus_level, CTLFLAG_RD, &kern_memorystatus_level, 0, "");
-SYSCTL_UINT(_kern, OID_AUTO, memorystatus_kev_failure_count, CTLFLAG_RD, &kern_memorystatus_kev_failure_count, 0, "");
+void
+memorystatus_on_inactivity(int pid)
+{
+#pragma unused(pid)
+#if CONFIG_FREEZE
+ /* Wake the freeze thread */
+ thread_wakeup((event_t)&memorystatus_freeze_wakeup);
+#endif
+}
-__private_extern__ void
-kern_memorystatus_init(void)
+static void
+memorystatus_thread(void *param __unused, wait_result_t wr __unused)
{
- jetsam_lck_attr = lck_attr_alloc_init();
- jetsam_lck_grp_attr= lck_grp_attr_alloc_init();
- jetsam_lck_grp = lck_grp_alloc_init("jetsam", jetsam_lck_grp_attr);
- jetsam_list_mlock = lck_mtx_alloc_init(jetsam_lck_grp, jetsam_lck_attr);
+ static boolean_t initialized = FALSE;
+ memorystatus_node *node;
+ uint64_t current_time;
+ pid_t victim_pid = -1;
+
+ if (initialized == FALSE) {
+ initialized = TRUE;
+ assert_wait(&memorystatus_wakeup, THREAD_UNINT);
+ (void)thread_block((thread_continue_t)memorystatus_thread);
+ }
+
+ /* Pick next idle exit victim. For now, just iterate through; ideally, this would be be more intelligent. */
+ current_time = mach_absolute_time();
+
+ /* Set a cutoff so that we don't idle exit processes that went recently clean */
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ if (memorystatus_dirty_count) {
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ if ((node->state & kProcessSupportsIdleExit) && !(node->state & (kProcessDirty|kProcessIgnoreIdleExit))) {
+ if (current_time >= node->clean_time) {
+ victim_pid = node->pid;
+ break;
+ }
+ }
+ }
+ }
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ if (-1 != victim_pid) {
+ proc_t p = proc_find(victim_pid);
+ if (p != NULL) {
+ boolean_t kill = FALSE;
+ proc_dirty_start(p);
+ /* Ensure process is still marked for idle exit and is clean */
+ if ((p->p_dirty & (P_DIRTY_ALLOW_IDLE_EXIT|P_DIRTY_IS_DIRTY|P_DIRTY_TERMINATED)) == (P_DIRTY_ALLOW_IDLE_EXIT)) {
+ /* Clean; issue SIGKILL */
+ p->p_dirty |= P_DIRTY_TERMINATED;
+ kill = TRUE;
+ }
+ proc_dirty_end(p);
+ if (TRUE == kill) {
+ printf("memorystatus_thread: idle exiting pid %d [%s]\n", victim_pid, (p->p_comm ? p->p_comm : "(unknown)"));
+ psignal(p, SIGKILL);
+ }
+ proc_rele(p);
+ }
+ }
- (void)kernel_thread(kernel_task, kern_memorystatus_thread);
+ assert_wait(&memorystatus_wakeup, THREAD_UNINT);
+ (void)thread_block((thread_continue_t)memorystatus_thread);
}
+#if CONFIG_JETSAM
+
static uint32_t
-jetsam_task_page_count(task_t task)
+memorystatus_task_page_count(task_t task)
{
kern_return_t ret;
static task_info_data_t data;
return 0;
}
+static int
+memorystatus_send_note(int event_code, void *data, size_t data_length) {
+ int ret;
+ struct kev_msg ev_msg;
+
+ ev_msg.vendor_code = KEV_VENDOR_APPLE;
+ ev_msg.kev_class = KEV_SYSTEM_CLASS;
+ ev_msg.kev_subclass = KEV_MEMORYSTATUS_SUBCLASS;
+
+ ev_msg.event_code = event_code;
+
+ ev_msg.dv[0].data_length = data_length;
+ ev_msg.dv[0].data_ptr = data;
+ ev_msg.dv[1].data_length = 0;
+
+ ret = kev_post_msg(&ev_msg);
+ if (ret) {
+ memorystatus_kev_failure_count++;
+ printf("%s: kev_post_msg() failed, err %d\n", __func__, ret);
+ }
+
+ return ret;
+}
+
static uint32_t
-jetsam_flags_for_pid(pid_t pid)
+memorystatus_build_flags_from_state(uint32_t state) {
+ uint32_t flags = 0;
+
+ if (state & kProcessForeground) {
+ flags |= kMemorystatusFlagsFrontmost;
+ }
+ if (state & kProcessActive) {
+ flags |= kMemorystatusFlagsActive;
+ }
+ if (state & kProcessSupportsIdleExit) {
+ flags |= kMemorystatusFlagsSupportsIdleExit;
+ }
+ if (state & kProcessDirty) {
+ flags |= kMemorystatusFlagsDirty;
+ }
+
+ return flags;
+}
+
+static void
+memorystatus_move_node_to_exit_list(memorystatus_node *node)
{
- int i;
+ /* Make sure we're called with the list lock held */
+ lck_mtx_assert(memorystatus_list_mlock, LCK_MTX_ASSERT_OWNED);
+
+ /* Now, acquire the exit list lock... */
+ lck_mtx_lock(exit_list_mlock);
+
+ /* Remove from list + update accounting... */
+ memorystatus_remove_node(node);
+
+ /* ...then insert at the end of the exit queue */
+ TAILQ_INSERT_TAIL(&exit_list, node, link);
+
+ /* And relax */
+ lck_mtx_unlock(exit_list_mlock);
+}
- for (i = 0; i < jetsam_priority_list_count; i++) {
- if (pid == jetsam_priority_list[i].pid) {
- return jetsam_priority_list[i].flags;
+void memorystatus_update(unsigned int pages_avail)
+{
+ if (!memorystatus_delta) {
+ return;
+ }
+
+ if ((pages_avail < memorystatus_available_pages_critical) ||
+ (pages_avail >= (memorystatus_available_pages + memorystatus_delta)) ||
+ (memorystatus_available_pages >= (pages_avail + memorystatus_delta))) {
+ memorystatus_available_pages = pages_avail;
+ memorystatus_level = memorystatus_available_pages * 100 / atop_64(max_mem);
+ /* Only wake the thread if currently blocked */
+ if (OSCompareAndSwap(0, 1, &memorystatus_jetsam_running)) {
+ thread_wakeup((event_t)&memorystatus_jetsam_wakeup);
}
}
- return 0;
+}
+
+static boolean_t
+memorystatus_get_snapshot_properties_for_proc_locked(proc_t p, memorystatus_jetsam_snapshot_entry_t *entry)
+{
+ memorystatus_node *node;
+
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ if (node->pid == p->p_pid) {
+ break;
+ }
+ }
+
+ if (!node) {
+ return FALSE;
+ }
+
+ entry->pid = p->p_pid;
+ strlcpy(&entry->name[0], p->p_comm, MAXCOMLEN+1);
+ entry->priority = node->priority;
+ entry->pages = memorystatus_task_page_count(p->task);
+ entry->flags = memorystatus_build_flags_from_state(node->state);
+ memcpy(&entry->uuid[0], &p->p_uuid[0], sizeof(p->p_uuid));
+
+ return TRUE;
}
static void
-jetsam_snapshot_procs(void)
+memorystatus_jetsam_snapshot_procs_locked(void)
{
proc_t p;
int i = 0;
- jetsam_snapshot.stats.free_pages = vm_page_free_count;
- jetsam_snapshot.stats.active_pages = vm_page_active_count;
- jetsam_snapshot.stats.inactive_pages = vm_page_inactive_count;
- jetsam_snapshot.stats.purgeable_pages = vm_page_purgeable_count;
- jetsam_snapshot.stats.wired_pages = vm_page_wire_count;
+ memorystatus_jetsam_snapshot.stats.free_pages = vm_page_free_count;
+ memorystatus_jetsam_snapshot.stats.active_pages = vm_page_active_count;
+ memorystatus_jetsam_snapshot.stats.inactive_pages = vm_page_inactive_count;
+ memorystatus_jetsam_snapshot.stats.throttled_pages = vm_page_throttled_count;
+ memorystatus_jetsam_snapshot.stats.purgeable_pages = vm_page_purgeable_count;
+ memorystatus_jetsam_snapshot.stats.wired_pages = vm_page_wire_count;
proc_list_lock();
LIST_FOREACH(p, &allproc, p_list) {
- task_t task = p->task;
- jetsam_snapshot_list[i].pid = p->p_pid;
- jetsam_snapshot_list[i].pages = jetsam_task_page_count(task);
- jetsam_snapshot_list[i].flags = jetsam_flags_for_pid(p->p_pid);
- strlcpy(&jetsam_snapshot_list[i].name[0], p->p_comm, MAXCOMLEN+1);
-#ifdef DEBUG
- printf("jetsam snapshot pid = %d, uuid = %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
+ if (FALSE == memorystatus_get_snapshot_properties_for_proc_locked(p, &memorystatus_jetsam_snapshot_list[i])) {
+ continue;
+ }
+
+ MEMORYSTATUS_DEBUG(0, "jetsam snapshot pid = %d, uuid = %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x\n",
p->p_pid,
p->p_uuid[0], p->p_uuid[1], p->p_uuid[2], p->p_uuid[3], p->p_uuid[4], p->p_uuid[5], p->p_uuid[6], p->p_uuid[7],
p->p_uuid[8], p->p_uuid[9], p->p_uuid[10], p->p_uuid[11], p->p_uuid[12], p->p_uuid[13], p->p_uuid[14], p->p_uuid[15]);
-#endif
- memcpy(&jetsam_snapshot_list[i].uuid[0], &p->p_uuid[0], sizeof(p->p_uuid));
- i++;
- if (i == kMaxSnapshotEntries) {
+
+ if (++i == kMaxSnapshotEntries) {
break;
}
}
proc_list_unlock();
- jetsam_snapshot.entry_count = jetsam_snapshot_list_count = i - 1;
+ memorystatus_jetsam_snapshot.snapshot_time = mach_absolute_time();
+ memorystatus_jetsam_snapshot.entry_count = memorystatus_jetsam_snapshot_list_count = i - 1;
}
static void
-jetsam_mark_pid_in_snapshot(pid_t pid)
+memorystatus_mark_pid_in_snapshot(pid_t pid, int flags)
{
-
int i = 0;
- for (i = 0; i < jetsam_snapshot_list_count; i++) {
- if (jetsam_snapshot_list[i].pid == pid) {
- jetsam_snapshot_list[i].flags |= kJetsamFlagsKilled;
+ for (i = 0; i < memorystatus_jetsam_snapshot_list_count; i++) {
+ if (memorystatus_jetsam_snapshot_list[i].pid == pid) {
+ memorystatus_jetsam_snapshot_list[i].flags |= flags;
return;
}
}
}
-static int
-jetsam_kill_top_proc(void)
+int
+memorystatus_kill_top_proc(boolean_t any, uint32_t cause)
{
proc_t p;
+ int pending_snapshot = 0;
- if (jetsam_snapshot_list_count == 0) {
- jetsam_snapshot_procs();
+#ifndef CONFIG_FREEZE
+#pragma unused(any)
+#endif
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ if (memorystatus_jetsam_snapshot_list_count == 0) {
+ memorystatus_jetsam_snapshot_procs_locked();
+ } else {
+ pending_snapshot = 1;
}
- lck_mtx_lock(jetsam_list_mlock);
- while (jetsam_priority_list_index < jetsam_priority_list_count) {
+
+ while (next_memorystatus_node) {
+ memorystatus_node *node;
pid_t aPid;
- aPid = jetsam_priority_list[jetsam_priority_list_index].pid;
- jetsam_priority_list_index++;
+#if DEVELOPMENT || DEBUG
+ int activeProcess;
+ int procSuspendedForDiagnosis;
+#endif /* DEVELOPMENT || DEBUG */
+
+ node = next_memorystatus_node;
+ next_memorystatus_node = TAILQ_NEXT(next_memorystatus_node, link);
+
+#if DEVELOPMENT || DEBUG
+ activeProcess = node->state & kProcessForeground;
+ procSuspendedForDiagnosis = node->state & kProcessSuspendedForDiag;
+#endif /* DEVELOPMENT || DEBUG */
+
+ aPid = node->pid;
+
/* skip empty slots in the list */
- if (aPid == 0) {
+ if (aPid == 0 || (node->state & kProcessKilled)) {
continue; // with lock held
}
- lck_mtx_unlock(jetsam_list_mlock);
- jetsam_mark_pid_in_snapshot(aPid);
+
p = proc_find(aPid);
if (p != NULL) {
-#if DEBUG
- printf("jetsam: killing pid %d [%s] - memory_status_level: %d - ", aPid, p->p_comm, kern_memorystatus_level);
-#endif /* DEBUG */
- exit1(p, W_EXITCODE(0, SIGKILL), (int *)NULL);
- proc_rele(p);
-#if DEBUG
- printf("jetsam: pid %d killed - memory_status_level: %d\n", aPid, kern_memorystatus_level);
-#endif /* DEBUG */
- return 0;
+ int flags = cause;
+
+#if DEVELOPMENT || DEBUG
+ if ((memorystatus_jetsam_policy & kPolicyDiagnoseActive) && procSuspendedForDiagnosis) {
+ printf("jetsam: continuing after ignoring proc suspended already for diagnosis - %d\n", aPid);
+ proc_rele(p);
+ continue;
+ }
+#endif /* DEVELOPMENT || DEBUG */
+
+#if CONFIG_FREEZE
+ boolean_t skip;
+ boolean_t reclaim_proc = !(node->state & (kProcessLocked | kProcessNoReclaimWorth));
+ if (any || reclaim_proc) {
+ if (node->state & kProcessFrozen) {
+ flags |= kMemorystatusFlagsFrozen;
+ }
+ skip = FALSE;
+ } else {
+ skip = TRUE;
+ }
+
+ if (skip) {
+ proc_rele(p);
+ } else
+#endif
+ {
+#if 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_comm ? p->p_comm: "(unknown)"), memorystatus_level);
+ memorystatus_mark_pid_in_snapshot(aPid, kMemorystatusFlagsSuspForDiagnosis);
+ node->state |= kProcessSuspendedForDiag;
+ if (memorystatus_jetsam_policy & kPolicyDiagnoseFirst) {
+ jetsam_diagnostic_suspended_one_active_proc = 1;
+ printf("jetsam: returning after suspending first active proc - %d\n", aPid);
+ }
+ lck_mtx_unlock(memorystatus_list_mlock);
+ task_suspend(p->task);
+ proc_rele(p);
+ return 0;
+ } else
+#endif /* DEVELOPMENT || DEBUG */
+ {
+ printf("memorystatus: jetsam killing pid %d [%s] - memorystatus_available_pages: %d\n",
+ aPid, (p->p_comm ? p->p_comm : "(unknown)"), memorystatus_available_pages);
+ /* Shift queue, update stats */
+ memorystatus_move_node_to_exit_list(node);
+ memorystatus_mark_pid_in_snapshot(aPid, flags);
+ lck_mtx_unlock(memorystatus_list_mlock);
+ exit1_internal(p, W_EXITCODE(0, SIGKILL), (int *)NULL, FALSE, FALSE);
+ proc_rele(p);
+ return 0;
+ }
+ }
+ }
+ }
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ // If we didn't kill anything, toss any newly-created snapshot
+ if (!pending_snapshot) {
+ memorystatus_jetsam_snapshot.entry_count = memorystatus_jetsam_snapshot_list_count = 0;
+ }
+
+ return -1;
+}
+
+int memorystatus_kill_top_proc_from_VM(void) {
+ return memorystatus_kill_top_proc(TRUE, kMemorystatusFlagsKilledVM);
+}
+
+static int
+memorystatus_kill_hiwat_proc(void)
+{
+ proc_t p;
+ int pending_snapshot = 0;
+ memorystatus_node *next_hiwat_node;
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ if (memorystatus_jetsam_snapshot_list_count == 0) {
+ memorystatus_jetsam_snapshot_procs_locked();
+ } else {
+ pending_snapshot = 1;
+ }
+
+ next_hiwat_node = next_memorystatus_node;
+
+ while (next_hiwat_node) {
+ pid_t aPid;
+ int32_t hiwat;
+ memorystatus_node *node;
+
+ node = next_hiwat_node;
+ next_hiwat_node = TAILQ_NEXT(next_hiwat_node, link);
+
+ aPid = node->pid;
+ hiwat = node->hiwat_pages;
+
+ /* skip empty or non-hiwat slots in the list */
+ if (aPid == 0 || (hiwat < 0) || (node->state & kProcessKilled)) {
+ continue; // with lock held
+ }
+
+ p = proc_find(aPid);
+ if (p != NULL) {
+ int32_t pages = (int32_t)memorystatus_task_page_count(p->task);
+ boolean_t skip = (pages <= hiwat);
+#if DEVELOPMENT || DEBUG
+ if (!skip && (memorystatus_jetsam_policy & kPolicyDiagnoseActive)) {
+ if (node->state & kProcessSuspendedForDiag) {
+ proc_rele(p);
+ continue;
+ }
+ }
+#endif /* DEVELOPMENT || DEBUG */
+
+#if CONFIG_FREEZE
+ if (!skip) {
+ if (node->state & kProcessLocked) {
+ skip = TRUE;
+ } else {
+ skip = FALSE;
+ }
+ }
+#endif
+
+ if (!skip) {
+ MEMORYSTATUS_DEBUG(1, "jetsam: %s pid %d [%s] - %d pages > 1 (%d)\n",
+ (memorystatus_jetsam_policy & kPolicyDiagnoseActive) ? "suspending": "killing", aPid, p->p_comm, pages, hiwat);
+#if DEVELOPMENT || DEBUG
+ if (memorystatus_jetsam_policy & kPolicyDiagnoseActive) {
+ memorystatus_mark_pid_in_snapshot(aPid, kMemorystatusFlagsSuspForDiagnosis);
+ node->state |= kProcessSuspendedForDiag;
+ lck_mtx_unlock(memorystatus_list_mlock);
+ task_suspend(p->task);
+ proc_rele(p);
+ MEMORYSTATUS_DEBUG(1, "jetsam: pid %d suspended for diagnosis - memorystatus_available_pages: %d\n", aPid, memorystatus_available_pages);
+ } else
+#endif /* DEVELOPMENT || DEBUG */
+ {
+ printf("memorystatus: jetsam killing pid %d [%s] (highwater) - memorystatus_available_pages: %d\n",
+ aPid, (p->p_comm ? p->p_comm : "(unknown)"), memorystatus_available_pages);
+ /* Shift queue, update stats */
+ memorystatus_move_node_to_exit_list(node);
+ memorystatus_mark_pid_in_snapshot(aPid, kMemorystatusFlagsKilledHiwat);
+ lck_mtx_unlock(memorystatus_list_mlock);
+ exit1(p, W_EXITCODE(0, SIGKILL), (int *)NULL);
+ proc_rele(p);
+ }
+ return 0;
+ } else {
+ proc_rele(p);
+ }
+
}
- lck_mtx_lock(jetsam_list_mlock);
}
- lck_mtx_unlock(jetsam_list_mlock);
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ // If we didn't kill anything, toss any newly-created snapshot
+ if (!pending_snapshot) {
+ memorystatus_jetsam_snapshot.entry_count = memorystatus_jetsam_snapshot_list_count = 0;
+ }
+
return -1;
}
static void
-kern_memorystatus_thread(void)
+memorystatus_jetsam_thread_block(void)
{
- struct kev_msg ev_msg;
- jetsam_kernel_stats_t data;
- int ret;
+ assert_wait(&memorystatus_jetsam_wakeup, THREAD_UNINT);
+ assert(memorystatus_jetsam_running == 1);
+ OSDecrementAtomic(&memorystatus_jetsam_running);
+ (void)thread_block((thread_continue_t)memorystatus_jetsam_thread);
+}
+static void
+memorystatus_jetsam_thread(void *param __unused, wait_result_t wr __unused)
+{
+ boolean_t post_snapshot = FALSE;
+ static boolean_t is_vm_privileged = FALSE;
+
+ 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;
+ memorystatus_jetsam_thread_block();
+ }
+
+ assert(memorystatus_available_pages != (unsigned)-1);
+
while(1) {
+ unsigned int last_available_pages;
- while (kern_memorystatus_level <= kern_memorystatus_level_critical) {
- if (jetsam_kill_top_proc() < 0) {
+#if DEVELOPMENT || DEBUG
+ jetsam_diagnostic_suspended_one_active_proc = 0;
+#endif /* DEVELOPMENT || DEBUG */
+
+ while (memorystatus_available_pages <= memorystatus_available_pages_highwater) {
+ if (memorystatus_kill_hiwat_proc() < 0) {
break;
}
+ post_snapshot = TRUE;
+ }
+
+ while (memorystatus_available_pages <= memorystatus_available_pages_critical) {
+ if (memorystatus_kill_top_proc(FALSE, kMemorystatusFlagsKilled) < 0) {
+ /* No victim was found - panic */
+ panic("memorystatus_jetsam_thread: no victim! available pages:%d, critical page level: %d\n",
+ memorystatus_available_pages, memorystatus_available_pages_critical);
+ }
+ post_snapshot = TRUE;
+#if DEVELOPMENT || DEBUG
+ if ((memorystatus_jetsam_policy & kPolicyDiagnoseFirst) && jetsam_diagnostic_suspended_one_active_proc) {
+ printf("jetsam: stopping killing since 1 active proc suspended already for diagnosis\n");
+ break; // we found first active proc, let's not kill any more
+ }
+#endif /* DEVELOPMENT || DEBUG */
}
+
+ last_available_pages = memorystatus_available_pages;
- kern_memorystatus_last_level = kern_memorystatus_level;
+ if (post_snapshot) {
+ size_t snapshot_size = sizeof(memorystatus_jetsam_snapshot_t) + sizeof(memorystatus_jetsam_snapshot_entry_t) * (memorystatus_jetsam_snapshot_list_count - 1);
+ memorystatus_jetsam_snapshot.notification_time = mach_absolute_time();
+ memorystatus_send_note(kMemorystatusSnapshotNote, &snapshot_size, sizeof(snapshot_size));
+ }
+
+ if (memorystatus_available_pages >= (last_available_pages + memorystatus_delta) ||
+ last_available_pages >= (memorystatus_available_pages + memorystatus_delta)) {
+ continue;
+ }
+
+#if VM_PRESSURE_EVENTS
+ memorystatus_check_pressure_reset();
+#endif
+
+ memorystatus_jetsam_thread_block();
+ }
+}
+
+#endif /* CONFIG_JETSAM */
+
+#if CONFIG_FREEZE
+
+__private_extern__ void
+memorystatus_freeze_init(void)
+{
+ kern_return_t result;
+ thread_t thread;
+
+ result = kernel_thread_start(memorystatus_freeze_thread, NULL, &thread);
+ if (result == KERN_SUCCESS) {
+ thread_deallocate(thread);
+ } else {
+ panic("Could not create memorystatus_freeze_thread");
+ }
+}
- ev_msg.vendor_code = KEV_VENDOR_APPLE;
- ev_msg.kev_class = KEV_SYSTEM_CLASS;
- ev_msg.kev_subclass = KEV_MEMORYSTATUS_SUBCLASS;
+static int
+memorystatus_freeze_top_proc(boolean_t *memorystatus_freeze_swap_low)
+{
+ proc_t p;
+ uint32_t i;
+ memorystatus_node *next_freeze_node;
- /* pass the memory status level (percent free) */
- ev_msg.event_code = kMemoryStatusLevelNote;
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ next_freeze_node = next_memorystatus_node;
+
+ while (next_freeze_node) {
+ memorystatus_node *node;
+ pid_t aPid;
+ uint32_t state;
+
+ node = next_freeze_node;
+ next_freeze_node = TAILQ_NEXT(next_freeze_node, link);
- ev_msg.dv[0].data_length = sizeof kern_memorystatus_last_level;
- ev_msg.dv[0].data_ptr = &kern_memorystatus_last_level;
- ev_msg.dv[1].data_length = sizeof data;
- ev_msg.dv[1].data_ptr = &data;
- ev_msg.dv[2].data_length = 0;
+ aPid = node->pid;
+ state = node->state;
- data.free_pages = vm_page_free_count;
- data.active_pages = vm_page_active_count;
- data.inactive_pages = vm_page_inactive_count;
- data.purgeable_pages = vm_page_purgeable_count;
- data.wired_pages = vm_page_wire_count;
+ /* skip empty slots in the list */
+ if (aPid == 0) {
+ continue; // with lock held
+ }
- ret = kev_post_msg(&ev_msg);
- if (ret) {
- kern_memorystatus_kev_failure_count++;
- printf("%s: kev_post_msg() failed, err %d\n", __func__, ret);
+ /* Ensure the process is eligible for freezing */
+ if ((state & (kProcessKilled | kProcessLocked | kProcessFrozen)) || !(state & kProcessSuspended)) {
+ continue; // with lock held
}
- if (jetsam_snapshot_list_count) {
- size_t snapshot_size = sizeof(jetsam_kernel_stats_t) + sizeof(size_t) + sizeof(jetsam_snapshot_entry_t) * jetsam_snapshot_list_count;
- ev_msg.event_code = kMemoryStatusSnapshotNote;
- ev_msg.dv[0].data_length = sizeof snapshot_size;
- ev_msg.dv[0].data_ptr = &snapshot_size;
- ev_msg.dv[1].data_length = 0;
+ p = proc_find(aPid);
+ if (p != NULL) {
+ kern_return_t kr;
+ uint32_t purgeable, wired, clean, dirty;
+ boolean_t shared;
+ uint32_t max_pages = 0;
+
+ /* Only freeze processes meeting our minimum resident page criteria */
+ if (memorystatus_task_page_count(p->task) < memorystatus_freeze_pages_min) {
+ proc_rele(p);
+ continue;
+ }
- ret = kev_post_msg(&ev_msg);
- if (ret) {
- kern_memorystatus_kev_failure_count++;
- printf("%s: kev_post_msg() failed, err %d\n", __func__, ret);
+ /* Ensure there's enough free space to freeze this process. */
+ max_pages = MIN(default_pager_swap_pages_free(), memorystatus_freeze_pages_max);
+ if (max_pages < memorystatus_freeze_pages_min) {
+ *memorystatus_freeze_swap_low = TRUE;
+ proc_rele(p);
+ lck_mtx_unlock(memorystatus_list_mlock);
+ return 0;
}
- }
+
+ /* Mark as locked temporarily to avoid kill */
+ node->state |= kProcessLocked;
+
+ kr = task_freeze(p->task, &purgeable, &wired, &clean, &dirty, max_pages, &shared, FALSE);
+
+ MEMORYSTATUS_DEBUG(1, "memorystatus_freeze_top_proc: task_freeze %s for pid %d [%s] - "
+ "memorystatus_pages: %d, purgeable: %d, wired: %d, clean: %d, dirty: %d, shared %d, free swap: %d\n",
+ (kr == KERN_SUCCESS) ? "SUCCEEDED" : "FAILED", aPid, (p->p_comm ? p->p_comm : "(unknown)"),
+ memorystatus_available_pages, purgeable, wired, clean, dirty, shared, default_pager_swap_pages_free());
+
+ proc_rele(p);
+
+ node->state &= ~kProcessLocked;
+
+ if (KERN_SUCCESS == kr) {
+ memorystatus_freeze_entry_t data = { aPid, kMemorystatusFlagsFrozen, dirty };
+
+ memorystatus_frozen_count++;
+
+ node->state |= (kProcessFrozen | (shared ? 0: kProcessNoReclaimWorth));
+
+ /* Update stats */
+ for (i = 0; i < sizeof(throttle_intervals) / sizeof(struct throttle_interval_t); i++) {
+ throttle_intervals[i].pageouts += dirty;
+ }
+
+ memorystatus_freeze_pageouts += dirty;
+ memorystatus_freeze_count++;
- if (kern_memorystatus_level >= kern_memorystatus_last_level + 5 ||
- kern_memorystatus_level <= kern_memorystatus_last_level - 5)
- continue;
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ memorystatus_send_note(kMemorystatusFreezeNote, &data, sizeof(data));
- assert_wait(&kern_memorystatus_wakeup, THREAD_UNINT);
- (void)thread_block((thread_continue_t)kern_memorystatus_thread);
+ return dirty;
+ }
+
+ /* Failed; go round again */
+ }
}
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ return -1;
}
-static int
-sysctl_io_variable(struct sysctl_req *req, void *pValue, size_t currentsize, size_t maxsize, size_t *newsize)
+static inline boolean_t
+memorystatus_can_freeze_processes(void)
{
- int error;
+ boolean_t ret;
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ if (memorystatus_suspended_count) {
+ uint32_t average_resident_pages, estimated_processes;
+
+ /* Estimate the number of suspended processes we can fit */
+ average_resident_pages = memorystatus_suspended_resident_count / memorystatus_suspended_count;
+ estimated_processes = memorystatus_suspended_count +
+ ((memorystatus_available_pages - memorystatus_available_pages_critical) / average_resident_pages);
- /* Copy blob out */
- error = SYSCTL_OUT(req, pValue, currentsize);
+ /* If it's predicted that no freeze will occur, lower the threshold temporarily */
+ if (estimated_processes <= FREEZE_SUSPENDED_THRESHOLD_DEFAULT) {
+ memorystatus_freeze_suspended_threshold = FREEZE_SUSPENDED_THRESHOLD_LOW;
+ } else {
+ memorystatus_freeze_suspended_threshold = FREEZE_SUSPENDED_THRESHOLD_DEFAULT;
+ }
- /* error or nothing to set */
- if (error || !req->newptr)
- return(error);
+ MEMORYSTATUS_DEBUG(1, "memorystatus_can_freeze_processes: %d suspended processes, %d average resident pages / process, %d suspended processes estimated\n",
+ memorystatus_suspended_count, average_resident_pages, estimated_processes);
+
+ if ((memorystatus_suspended_count - memorystatus_frozen_count) > memorystatus_freeze_suspended_threshold) {
+ ret = TRUE;
+ } else {
+ ret = FALSE;
+ }
+ } else {
+ ret = FALSE;
+ }
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ return ret;
+}
- if (req->newlen > maxsize) {
- return EINVAL;
+static boolean_t
+memorystatus_can_freeze(boolean_t *memorystatus_freeze_swap_low)
+{
+ /* Only freeze if we're sufficiently low on memory; this holds off freeze right
+ after boot, and is generally is a no-op once we've reached steady state. */
+ if (memorystatus_available_pages > memorystatus_freeze_threshold) {
+ return FALSE;
+ }
+
+ /* Check minimum suspended process threshold. */
+ if (!memorystatus_can_freeze_processes()) {
+ return FALSE;
}
- error = SYSCTL_IN(req, pValue, req->newlen);
- if (!error) {
- *newsize = req->newlen;
+ /* Is swap running low? */
+ if (*memorystatus_freeze_swap_low) {
+ /* If there's been no movement in free swap pages since we last attempted freeze, return. */
+ if (default_pager_swap_pages_free() < memorystatus_freeze_pages_min) {
+ return FALSE;
+ }
+
+ /* Pages have been freed - we can retry. */
+ *memorystatus_freeze_swap_low = FALSE;
}
+
+ /* OK */
+ return TRUE;
+}
+
+static void
+memorystatus_freeze_update_throttle_interval(mach_timespec_t *ts, struct throttle_interval_t *interval)
+{
+ if (CMP_MACH_TIMESPEC(ts, &interval->ts) >= 0) {
+ if (!interval->max_pageouts) {
+ interval->max_pageouts = (interval->burst_multiple * (((uint64_t)interval->mins * FREEZE_DAILY_PAGEOUTS_MAX) / (24 * 60)));
+ } else {
+ printf("memorystatus_freeze_update_throttle_interval: %d minute throttle timeout, resetting\n", interval->mins);
+ }
+ interval->ts.tv_sec = interval->mins * 60;
+ interval->ts.tv_nsec = 0;
+ ADD_MACH_TIMESPEC(&interval->ts, ts);
+ /* Since we update the throttle stats pre-freeze, adjust for overshoot here */
+ if (interval->pageouts > interval->max_pageouts) {
+ interval->pageouts -= interval->max_pageouts;
+ } else {
+ interval->pageouts = 0;
+ }
+ interval->throttle = FALSE;
+ } else if (!interval->throttle && interval->pageouts >= interval->max_pageouts) {
+ printf("memorystatus_freeze_update_throttle_interval: %d minute pageout limit exceeded; enabling throttle\n", interval->mins);
+ interval->throttle = TRUE;
+ }
- return(error);
+ MEMORYSTATUS_DEBUG(1, "memorystatus_freeze_update_throttle_interval: throttle updated - %d frozen (%d max) within %dm; %dm remaining; throttle %s\n",
+ interval->pageouts, interval->max_pageouts, interval->mins, (interval->ts.tv_sec - ts->tv_sec) / 60,
+ interval->throttle ? "on" : "off");
}
-static int
-sysctl_handle_kern_memorystatus_priority_list(__unused struct sysctl_oid *oid, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
+static boolean_t
+memorystatus_freeze_update_throttle(void)
+{
+ clock_sec_t sec;
+ clock_nsec_t nsec;
+ mach_timespec_t ts;
+ uint32_t i;
+ boolean_t throttled = FALSE;
+
+#if DEVELOPMENT || DEBUG
+ if (!memorystatus_freeze_throttle_enabled)
+ return FALSE;
+#endif
+
+ clock_get_system_nanotime(&sec, &nsec);
+ ts.tv_sec = sec;
+ ts.tv_nsec = nsec;
+
+ /* Check freeze pageouts over multiple intervals and throttle if we've exceeded our budget.
+ *
+ * This ensures that periods of inactivity can't be used as 'credit' towards freeze if the device has
+ * remained dormant for a long period. We do, however, allow increased thresholds for shorter intervals in
+ * order to allow for bursts of activity.
+ */
+ for (i = 0; i < sizeof(throttle_intervals) / sizeof(struct throttle_interval_t); i++) {
+ memorystatus_freeze_update_throttle_interval(&ts, &throttle_intervals[i]);
+ if (throttle_intervals[i].throttle == TRUE)
+ throttled = TRUE;
+ }
+
+ return throttled;
+}
+
+static void
+memorystatus_freeze_thread(void *param __unused, wait_result_t wr __unused)
{
- int i, ret;
- jetsam_priority_entry_t temp_list[kMaxPriorityEntries];
- size_t newsize, currentsize;
+ static boolean_t memorystatus_freeze_swap_low = FALSE;
+
+ if (memorystatus_freeze_enabled) {
+ if (memorystatus_can_freeze(&memorystatus_freeze_swap_low)) {
+ /* Only freeze if we've not exceeded our pageout budgets */
+ if (!memorystatus_freeze_update_throttle()) {
+ memorystatus_freeze_top_proc(&memorystatus_freeze_swap_low);
+ } else {
+ printf("memorystatus_freeze_thread: in throttle, ignoring freeze\n");
+ memorystatus_freeze_throttle_count++; /* Throttled, update stats */
+ }
+ }
+ }
+
+ assert_wait((event_t) &memorystatus_freeze_wakeup, THREAD_UNINT);
+ thread_block((thread_continue_t) memorystatus_freeze_thread);
+}
+
+#endif /* CONFIG_FREEZE */
+
+#if CONFIG_JETSAM
+
+#if VM_PRESSURE_EVENTS
+
+static inline boolean_t
+memorystatus_get_pressure_locked(void) {
+ if (memorystatus_available_pages > memorystatus_available_pages_pressure) {
+ /* Too many free pages */
+ return kVMPressureNormal;
+ }
+
+#if CONFIG_FREEZE
+ if (memorystatus_frozen_count > 0) {
+ /* Frozen processes exist */
+ return kVMPressureNormal;
+ }
+#endif
+
+ if (memorystatus_suspended_count > MEMORYSTATUS_SUSPENDED_THRESHOLD) {
+ /* Too many supended processes */
+ return kVMPressureNormal;
+ }
+
+ if (memorystatus_suspended_count > 0) {
+ /* Some suspended processes - warn */
+ return kVMPressureWarning;
+ }
+
+ /* Otherwise, pressure level is urgent */
+ return kVMPressureUrgent;
+}
+
+pid_t
+memorystatus_request_vm_pressure_candidate(void) {
+ memorystatus_node *node;
+ pid_t pid = -1;
+
+ lck_mtx_lock(memorystatus_list_mlock);
- if (req->oldptr) {
- lck_mtx_lock(jetsam_list_mlock);
- for (i = 0; i < jetsam_priority_list_count; i++) {
- temp_list[i] = jetsam_priority_list[i];
+ /* Are we in a low memory state? */
+ memorystatus_vm_pressure_level = memorystatus_get_pressure_locked();
+ if (kVMPressureNormal != memorystatus_vm_pressure_level) {
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ /* Skip ineligible processes */
+ if (node->state & (kProcessKilled | kProcessLocked | kProcessSuspended | kProcessFrozen | kProcessNotifiedForPressure)) {
+ continue;
+ }
+ node->state |= kProcessNotifiedForPressure;
+ pid = node->pid;
+ break;
}
- lck_mtx_unlock(jetsam_list_mlock);
}
+
+ lck_mtx_unlock(memorystatus_list_mlock);
- currentsize = sizeof(jetsam_priority_list[0]) * jetsam_priority_list_count;
+ return pid;
+}
- ret = sysctl_io_variable(req, &temp_list[0], currentsize, sizeof(temp_list), &newsize);
+void
+memorystatus_send_pressure_note(pid_t pid) {
+ memorystatus_send_note(kMemorystatusPressureNote, &pid, sizeof(pid));
+}
- if (!ret && req->newptr) {
- jetsam_priority_list_count = newsize / sizeof(jetsam_priority_list[0]);
-#if DEBUG
- printf("set jetsam priority pids = { ");
- for (i = 0; i < jetsam_priority_list_count; i++) {
- printf("(%d, 0x%08x, %d) ", temp_list[i].pid, temp_list[i].flags, temp_list[i].hiwat_pages);
+static void
+memorystatus_check_pressure_reset() {
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ if (kVMPressureNormal != memorystatus_vm_pressure_level) {
+ memorystatus_vm_pressure_level = memorystatus_get_pressure_locked();
+ if (kVMPressureNormal == memorystatus_vm_pressure_level) {
+ memorystatus_node *node;
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ node->state &= ~kProcessNotifiedForPressure;
+ }
}
- printf("}\n");
-#endif /* DEBUG */
- lck_mtx_lock(jetsam_list_mlock);
- for (i = 0; i < jetsam_priority_list_count; i++) {
- jetsam_priority_list[i] = temp_list[i];
+ }
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+}
+
+#endif /* VM_PRESSURE_EVENTS */
+
+/* Sysctls... */
+
+static int
+sysctl_memorystatus_list_change SYSCTL_HANDLER_ARGS
+{
+ int ret;
+ memorystatus_priority_entry_t entry;
+
+#pragma unused(oidp, arg1, arg2)
+
+ if (!req->newptr || req->newlen > sizeof(entry)) {
+ return EINVAL;
+ }
+
+ ret = SYSCTL_IN(req, &entry, req->newlen);
+ if (ret) {
+ return ret;
+ }
+
+ memorystatus_list_change(FALSE, entry.pid, entry.priority, entry.flags, -1);
+
+ return ret;
+}
+
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_jetsam_change, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED,
+ 0, 0, &sysctl_memorystatus_list_change, "I", "");
+
+static int
+sysctl_memorystatus_priority_list(__unused struct sysctl_oid *oid, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
+{
+ int ret;
+ size_t allocated_size, list_size = 0;
+ memorystatus_priority_entry_t *list;
+ uint32_t list_count, i = 0;
+ memorystatus_node *node;
+
+ /* Races, but this is only for diagnostic purposes */
+ list_count = memorystatus_list_count;
+ allocated_size = sizeof(memorystatus_priority_entry_t) * list_count;
+ list = kalloc(allocated_size);
+ if (!list) {
+ return ENOMEM;
+ }
+
+ memset(list, 0, allocated_size);
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ TAILQ_FOREACH(node, &memorystatus_list, link) {
+ list[i].pid = node->pid;
+ list[i].priority = node->priority;
+ list[i].flags = memorystatus_build_flags_from_state(node->state);
+ list[i].hiwat_pages = node->hiwat_pages;
+ list_size += sizeof(memorystatus_priority_entry_t);
+ if (++i >= list_count) {
+ break;
+ }
+ }
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ if (!list_size) {
+ if (req->oldptr) {
+ MEMORYSTATUS_DEBUG(1, "kern.memorystatus_priority_list returning EINVAL\n");
+ return EINVAL;
}
- for (i = jetsam_priority_list_count; i < kMaxPriorityEntries; i++) {
- jetsam_priority_list[i].pid = 0;
- jetsam_priority_list[i].flags = 0;
- jetsam_priority_list[i].hiwat_pages = -1;
- jetsam_priority_list[i].hiwat_reserved1 = -1;
- jetsam_priority_list[i].hiwat_reserved2 = -1;
- jetsam_priority_list[i].hiwat_reserved3 = -1;
+ else {
+ MEMORYSTATUS_DEBUG(1, "kern.memorystatus_priority_list returning 0 for size\n");
}
- jetsam_priority_list_index = 0;
- lck_mtx_unlock(jetsam_list_mlock);
- }
+ } else {
+ MEMORYSTATUS_DEBUG(1, "kern.memorystatus_priority_list returning %ld for size\n", (long)list_size);
+ }
+
+ ret = SYSCTL_OUT(req, list, list_size);
+
+ kfree(list, allocated_size);
+
return ret;
}
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_priority_list, CTLTYPE_OPAQUE|CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0, sysctl_memorystatus_priority_list, "S,jetsam_priorities", "");
+
+static void
+memorystatus_update_levels_locked(void) {
+ /* Set the baseline levels in pages */
+ memorystatus_available_pages_critical = (CRITICAL_PERCENT / DELTA_PERCENT) * memorystatus_delta;
+ memorystatus_available_pages_highwater = (HIGHWATER_PERCENT / DELTA_PERCENT) * memorystatus_delta;
+#if VM_PRESSURE_EVENTS
+ memorystatus_available_pages_pressure = (PRESSURE_PERCENT / DELTA_PERCENT) * memorystatus_delta;
+#endif
+
+#if DEBUG || DEVELOPMENT
+ if (memorystatus_jetsam_policy & kPolicyDiagnoseActive) {
+ memorystatus_available_pages_critical += memorystatus_jetsam_policy_offset_pages_diagnostic;
+ memorystatus_available_pages_highwater += memorystatus_jetsam_policy_offset_pages_diagnostic;
+#if VM_PRESSURE_EVENTS
+ memorystatus_available_pages_pressure += memorystatus_jetsam_policy_offset_pages_diagnostic;
+#endif
+ }
+#endif
+
+ /* Only boost the critical level - it's more important to kill right away than issue warnings */
+ if (memorystatus_jetsam_policy & kPolicyMoreFree) {
+ memorystatus_available_pages_critical += memorystatus_jetsam_policy_offset_pages_more_free;
+ }
+}
+
+static int
+sysctl_memorystatus_jetsam_policy_more_free SYSCTL_HANDLER_ARGS
+{
+#pragma unused(arg1, arg2, oidp)
+ int error, more_free = 0;
+
+ error = priv_check_cred(kauth_cred_get(), PRIV_VM_JETSAM, 0);
+ if (error)
+ return (error);
+
+ error = sysctl_handle_int(oidp, &more_free, 0, req);
+ if (error || !req->newptr)
+ return (error);
+
+ lck_mtx_lock(memorystatus_list_mlock);
+
+ if (more_free) {
+ memorystatus_jetsam_policy |= kPolicyMoreFree;
+ } else {
+ memorystatus_jetsam_policy &= ~kPolicyMoreFree;
+ }
+
+ memorystatus_update_levels_locked();
+
+ lck_mtx_unlock(memorystatus_list_mlock);
+
+ return 0;
+}
+
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_jetsam_policy_more_free, CTLTYPE_INT|CTLFLAG_WR|CTLFLAG_LOCKED|CTLFLAG_MASKED|CTLFLAG_ANYBODY,
+ 0, 0, &sysctl_memorystatus_jetsam_policy_more_free, "I", "");
+
static int
-sysctl_handle_kern_memorystatus_snapshot(__unused struct sysctl_oid *oid, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
+sysctl_handle_memorystatus_snapshot(__unused struct sysctl_oid *oid, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
{
int ret;
size_t currentsize = 0;
- if (jetsam_snapshot_list_count > 0) {
- currentsize = sizeof(jetsam_kernel_stats_t) + sizeof(size_t) + sizeof(jetsam_snapshot_entry_t) * jetsam_snapshot_list_count;
+ if (memorystatus_jetsam_snapshot_list_count > 0) {
+ currentsize = sizeof(memorystatus_jetsam_snapshot_t) + sizeof(memorystatus_jetsam_snapshot_entry_t) * (memorystatus_jetsam_snapshot_list_count - 1);
}
if (!currentsize) {
if (req->oldptr) {
-#ifdef DEBUG
- printf("kern.memorystatus_snapshot returning EINVAL\n");
-#endif
+ MEMORYSTATUS_DEBUG(1, "kern.memorystatus_snapshot returning EINVAL\n");
return EINVAL;
}
else {
-#ifdef DEBUG
- printf("kern.memorystatus_snapshot returning 0 for size\n");
-#endif
+ MEMORYSTATUS_DEBUG(1, "kern.memorystatus_snapshot returning 0 for size\n");
}
} else {
-#ifdef DEBUG
- printf("kern.memorystatus_snapshot returning %ld for size\n", (long)currentsize);
-#endif
+ MEMORYSTATUS_DEBUG(1, "kern.memorystatus_snapshot returning %ld for size\n", (long)currentsize);
}
- ret = sysctl_io_variable(req, &jetsam_snapshot, currentsize, 0, NULL);
+ ret = SYSCTL_OUT(req, &memorystatus_jetsam_snapshot, currentsize);
if (!ret && req->oldptr) {
- jetsam_snapshot.entry_count = jetsam_snapshot_list_count = 0;
+ memorystatus_jetsam_snapshot.entry_count = memorystatus_jetsam_snapshot_list_count = 0;
}
return ret;
}
-SYSCTL_PROC(_kern, OID_AUTO, memorystatus_priority_list, CTLTYPE_OPAQUE|CTLFLAG_RW, 0, 0, sysctl_handle_kern_memorystatus_priority_list, "S,jetsam_priorities", "");
-SYSCTL_PROC(_kern, OID_AUTO, memorystatus_snapshot, CTLTYPE_OPAQUE|CTLFLAG_RD, 0, 0, sysctl_handle_kern_memorystatus_snapshot, "S,jetsam_snapshot", "");
+SYSCTL_PROC(_kern, OID_AUTO, memorystatus_snapshot, CTLTYPE_OPAQUE|CTLFLAG_RD, 0, 0, sysctl_handle_memorystatus_snapshot, "S,memorystatus_snapshot", "");
+
+#endif /* CONFIG_JETSAM */
projects / apple / xnu.git / blobdiff