#define JETSAM_PRIORITY_REVISION 2
+#define JETSAM_PRIORITY_IDLE_HEAD -2
+/* The value -1 is an alias to JETSAM_PRIORITY_DEFAULT */
#define JETSAM_PRIORITY_IDLE 0
#define JETSAM_PRIORITY_IDLE_DEFERRED 1
#define JETSAM_PRIORITY_BACKGROUND_OPPORTUNISTIC 2
uint64_t user_data;
uint8_t uuid[16];
uint32_t fds;
+ uint32_t max_pages_lifetime;
+ uint32_t purgeable_pages;
+ struct timeval cpu_time;
} memorystatus_jetsam_snapshot_entry_t;
typedef struct jetsam_snapshot {
kMemorystatusKilledVnodes,
kMemorystatusKilledVMPageShortage,
kMemorystatusKilledVMThrashing,
+ kMemorystatusKilledFCThrashing,
kMemorystatusKilledPerProcessLimit,
kMemorystatusKilledDiagnostic,
kMemorystatusKilledIdleExit
#define MEMORYSTATUS_CMD_SET_PRIORITY_PROPERTIES 2
#define MEMORYSTATUS_CMD_GET_JETSAM_SNAPSHOT 3
#define MEMORYSTATUS_CMD_GET_PRESSURE_STATUS 4
-#define MEMORYSTATUS_CMD_SET_JETSAM_HIGH_WATER_MARK 5 /* TODO: deprecate */
+#define MEMORYSTATUS_CMD_SET_JETSAM_HIGH_WATER_MARK 5 /* Set active memory limit = inactive memory limit, both non-fatal */
+#define MEMORYSTATUS_CMD_SET_JETSAM_TASK_LIMIT 6 /* Set active memory limit = inactive memory limit, both fatal */
+#define MEMORYSTATUS_CMD_SET_MEMLIMIT_PROPERTIES 7 /* Set memory limits plus attributes independently */
+#define MEMORYSTATUS_CMD_GET_MEMLIMIT_PROPERTIES 8 /* Get memory limits plus attributes */
+#define MEMORYSTATUS_CMD_PRIVILEGED_LISTENER_ENABLE 9 /* Set the task's status as a privileged listener w.r.t memory notifications */
+#define MEMORYSTATUS_CMD_PRIVILEGED_LISTENER_DISABLE 10 /* Reset the task's status as a privileged listener w.r.t memory notifications */
+#define MEMORYSTATUS_CMD_AGGRESSIVE_JETSAM_LENIENT_MODE_ENABLE 11 /* Enable the 'lenient' mode for aggressive jetsam. See comments in kern_memorystatus.c near the top. */
+#define MEMORYSTATUS_CMD_AGGRESSIVE_JETSAM_LENIENT_MODE_DISABLE 12 /* Disable the 'lenient' mode for aggressive jetsam. */
+/* Commands that act on a group of processes */
+#define MEMORYSTATUS_CMD_GRP_SET_PROPERTIES 100
#if PRIVATE
/* Test commands */
/* Trigger forced jetsam */
-#define MEMORYSTATUS_CMD_TEST_JETSAM 1000
+#define MEMORYSTATUS_CMD_TEST_JETSAM 1000
+#define MEMORYSTATUS_CMD_TEST_JETSAM_SORT 1001
/* Panic on jetsam options */
typedef struct memorystatus_jetsam_panic_options {
uint32_t mask;
} memorystatus_jetsam_panic_options_t;
-#define MEMORYSTATUS_CMD_SET_JETSAM_PANIC_BITS 1001
+#define MEMORYSTATUS_CMD_SET_JETSAM_PANIC_BITS 1002
+
+/* Select priority band sort order */
+#define JETSAM_SORT_NOSORT 0
+#define JETSAM_SORT_DEFAULT 1
+
#endif /* PRIVATE */
+/*
+ * For use with memorystatus_control:
+ * MEMORYSTATUS_CMD_GET_JETSAM_SNAPSHOT
+ *
+ * A jetsam snapshot is initialized when a non-idle
+ * jetsam event occurs. The data is held in the
+ * buffer until it is reaped. This is the default
+ * behavior.
+ *
+ * Flags change the default behavior:
+ * Demand mode - this is an on_demand snapshot,
+ * meaning data is populated upon request.
+ *
+ * Boot mode - this is a snapshot of
+ * memstats collected before loading the
+ * init program. Once collected, these
+ * stats do not change. In this mode,
+ * the snapshot entry_count is always 0.
+ *
+ * Snapshots are inherently racey between request
+ * for buffer size and actual data compilation.
+*/
+
+/* Flags */
+#define MEMORYSTATUS_SNAPSHOT_ON_DEMAND 0x1 /* A populated snapshot buffer is returned on demand */
+#define MEMORYSTATUS_SNAPSHOT_AT_BOOT 0x2 /* Returns a snapshot with memstats collected at boot */
+
+
+/*
+ * For use with memorystatus_control:
+ * MEMORYSTATUS_CMD_SET_PRIORITY_PROPERTIES
+ */
typedef struct memorystatus_priority_properties {
int32_t priority;
uint64_t user_data;
} memorystatus_priority_properties_t;
+/*
+ * For use with memorystatus_control:
+ * MEMORYSTATUS_CMD_SET_MEMLIMIT_PROPERTIES
+ * MEMORYSTATUS_CMD_GET_MEMLIMIT_PROPERTIES
+ */
+typedef struct memorystatus_memlimit_properties {
+ int32_t memlimit_active; /* jetsam memory limit (in MB) when process is active */
+ uint32_t memlimit_active_attr;
+ int32_t memlimit_inactive; /* jetsam memory limit (in MB) when process is inactive */
+ uint32_t memlimit_inactive_attr;
+} memorystatus_memlimit_properties_t;
+
+#define MEMORYSTATUS_MEMLIMIT_ATTR_FATAL 0x1 /* if set, exceeding the memlimit is fatal */
+
+
#ifdef XNU_KERNEL_PRIVATE
-/* p_memstat_state flags */
+/*
+ * A process will be killed immediately if it crosses a memory limit marked as fatal.
+ * Fatal limit types are the
+ * - default system-wide task limit
+ * - per-task custom memory limit
+ *
+ * A process with a non-fatal memory limit can exceed that limit, but becomes an early
+ * candidate for jetsam when the device is under memory pressure.
+ * Non-fatal limit types are the
+ * - high-water-mark limit
+ *
+ * P_MEMSTAT_MEMLIMIT_BACKGROUND is translated in posix_spawn as
+ * the fatal system_wide task limit when active
+ * non-fatal inactive limit based on limit provided.
+ * This is necessary for backward compatibility until the
+ * the flag can be considered obsolete.
+ *
+ * Processes that opt into dirty tracking are evaluated
+ * based on clean vs dirty state.
+ * dirty ==> active
+ * clean ==> inactive
+ *
+ * Processes that do not opt into dirty tracking are
+ * evalulated based on priority level.
+ * Foreground or above ==> active
+ * Below Foreground ==> inactive
+ */
+
+/*
+ * p_memstat_state flag holds
+ * - in kernel process state and memlimit state
+ */
#define P_MEMSTAT_SUSPENDED 0x00000001
#define P_MEMSTAT_FROZEN 0x00000002
#define P_MEMSTAT_FOREGROUND 0x00000100
#define P_MEMSTAT_DIAG_SUSPENDED 0x00000200
#define P_MEMSTAT_PRIOR_THAW 0x00000400
-#define P_MEMSTAT_MEMLIMIT_BACKGROUND 0x00000800
+#define P_MEMSTAT_MEMLIMIT_BACKGROUND 0x00000800 /* Task has a memory limit for when it's in the background. Used for a process' "high water mark".*/
#define P_MEMSTAT_INTERNAL 0x00001000
+#define P_MEMSTAT_FATAL_MEMLIMIT 0x00002000 /* current fatal state of the process's memlimit */
+#define P_MEMSTAT_MEMLIMIT_ACTIVE_FATAL 0x00004000 /* if set, exceeding limit is fatal when the process is active */
+#define P_MEMSTAT_MEMLIMIT_ACTIVE_EXC_TRIGGERED 0x00008000 /* if set, supresses high-water-mark EXC_RESOURCE, allows one hit per active limit */
+#define P_MEMSTAT_MEMLIMIT_INACTIVE_FATAL 0x00010000 /* if set, exceeding limit is fatal when the process is inactive */
+#define P_MEMSTAT_MEMLIMIT_INACTIVE_EXC_TRIGGERED 0x00020000 /* if set, supresses high-water-mark EXC_RESOURCE, allows one hit per inactive limit */
extern void memorystatus_init(void) __attribute__((section("__TEXT, initcode")));
+extern void memorystatus_init_at_boot_snapshot(void);
+
extern int memorystatus_add(proc_t p, boolean_t locked);
-extern int memorystatus_update(proc_t p, int priority, uint64_t user_data, boolean_t effective, boolean_t update_memlimit, int32_t memlimit, boolean_t memlimit_background);
+extern 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, boolean_t memlimit_background);
+
extern int memorystatus_remove(proc_t p, boolean_t locked);
extern int memorystatus_dirty_track(proc_t p, uint32_t pcontrol);
extern int memorystatus_dirty_set(proc_t p, boolean_t self, uint32_t pcontrol);
extern int memorystatus_dirty_get(proc_t p);
+extern int memorystatus_dirty_clear(proc_t p, uint32_t pcontrol);
extern int memorystatus_on_terminate(proc_t p);
#if CONFIG_JETSAM
+int memorystatus_get_pressure_status_kdp(void);
+
typedef enum memorystatus_policy {
kPolicyDefault = 0x0,
kPolicyMoreFree = 0x1,
boolean_t memorystatus_kill_on_VM_page_shortage(boolean_t async);
boolean_t memorystatus_kill_on_VM_thrashing(boolean_t async);
+boolean_t memorystatus_kill_on_FC_thrashing(boolean_t async);
boolean_t memorystatus_kill_on_vnode_limit(void);
void memorystatus_on_ledger_footprint_exceeded(int warning, const int max_footprint_mb);
+void proc_memstat_terminated(proc_t p, boolean_t set);
+void jetsam_on_ledger_cpulimit_exceeded(void);
void memorystatus_pages_update(unsigned int pages_avail);
-extern boolean_t memorystatus_is_foreground_locked(proc_t p);
-
#else /* CONFIG_JETSAM */
boolean_t memorystatus_idle_exit_from_VM(void);
#define FREEZE_SUSPENDED_THRESHOLD_LOW 2
#define FREEZE_SUSPENDED_THRESHOLD_DEFAULT 4
-#define FREEZE_DAILY_MB_MAX 1024
-#define FREEZE_DAILY_PAGEOUTS_MAX (FREEZE_DAILY_MB_MAX * (1024 * 1024 / PAGE_SIZE))
+#define FREEZE_DAILY_MB_MAX_DEFAULT 1024
typedef struct throttle_interval_t {
uint32_t mins;
extern int memorystatus_freeze_wakeup;
extern void memorystatus_freeze_init(void) __attribute__((section("__TEXT, initcode")));
-
+extern int memorystatus_freeze_process_sync(proc_t p);
#endif /* CONFIG_FREEZE */
#if VM_PRESSURE_EVENTS
-#define MEMORYSTATUS_SUSPENDED_THRESHOLD 4
-
extern kern_return_t memorystatus_update_vm_pressure(boolean_t);
-#if CONFIG_JETSAM
+#if CONFIG_MEMORYSTATUS
+/* Flags */
+extern int memorystatus_low_mem_privileged_listener(uint32_t op_flags);
extern int memorystatus_send_pressure_note(int pid);
+extern boolean_t memorystatus_is_foreground_locked(proc_t p);
extern boolean_t memorystatus_bg_pressure_eligible(proc_t p);
-#endif
+#endif /* CONFIG_MEMORYSTATUS */
#endif /* VM_PRESSURE_EVENTS */
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