linux-imx

/*

 *  linux/mm/oom_kill.c

 * 

 *  Copyright (C)  1998,2000  Rik van Riel

 *  Thanks go out to Claus Fischer for some serious inspiration and

 *  for goading me into coding this file...

 *  Copyright (C)  2010  Google, Inc.

 *  Rewritten by David Rientjes

 *

 *  The routines in this file are used to kill a process when

 *  we're seriously out of memory. This gets called from __alloc_pages()

 *  in mm/page_alloc.c when we really run out of memory.

 *

 *  Since we won't call these routines often (on a well-configured

 *  machine) this file will double as a 'coding guide' and a signpost

 *  for newbie kernel hackers. It features several pointers to major

 *  kernel subsystems and hints as to where to find out what things do.

 */

​

#include <linux/oom.h>

#include <linux/mm.h>

#include <linux/err.h>

#include <linux/gfp.h>

#include <linux/sched.h>

#include <linux/sched/mm.h>

#include <linux/sched/coredump.h>

#include <linux/sched/task.h>

#include <linux/swap.h>

#include <linux/timex.h>

#include <linux/jiffies.h>

#include <linux/cpuset.h>

#include <linux/export.h>

#include <linux/notifier.h>

#include <linux/memcontrol.h>

#include <linux/mempolicy.h>

#include <linux/security.h>

#include <linux/ptrace.h>

#include <linux/freezer.h>

#include <linux/ftrace.h>

#include <linux/ratelimit.h>

#include <linux/kthread.h>

#include <linux/init.h>

#include <linux/mmu_notifier.h>

​

#include <asm/tlb.h>

#include "internal.h"

#include "slab.h"

​

#define CREATE_TRACE_POINTS

#include <trace/events/oom.h>

​

int sysctl_panic_on_oom;

int sysctl_oom_kill_allocating_task;

int sysctl_oom_dump_tasks = 1;

​

/*

 * Serializes oom killer invocations (out_of_memory()) from all contexts to

 * prevent from over eager oom killing (e.g. when the oom killer is invoked

 * from different domains).

 *

 * oom_killer_disable() relies on this lock to stabilize oom_killer_disabled

 * and mark_oom_victim

 */