cregit-Linux how code gets into the kernel

Release 4.7 include/linux/oom.h

Directory: include/linux
#ifndef __INCLUDE_LINUX_OOM_H

#define __INCLUDE_LINUX_OOM_H


#include <linux/sched.h>
#include <linux/types.h>
#include <linux/nodemask.h>
#include <uapi/linux/oom.h>

struct zonelist;
struct notifier_block;
struct mem_cgroup;
struct task_struct;

/*
 * Details of the page allocation that triggered the oom killer that are used to
 * determine what should be killed.
 */

struct oom_control {
	/* Used to determine cpuset */
	
struct zonelist *zonelist;

	/* Used to determine mempolicy */
	
nodemask_t *nodemask;

	/* Used to determine cpuset and node locality requirement */
	
const gfp_t gfp_mask;

	/*
         * order == -1 means the oom kill is required by sysrq, otherwise only
         * for display purposes.
         */
	
const int order;
};

/*
 * Types of limitations to the nodes from which allocations may occur
 */

enum oom_constraint {
	
CONSTRAINT_NONE,
	
CONSTRAINT_CPUSET,
	
CONSTRAINT_MEMORY_POLICY,
	
CONSTRAINT_MEMCG,
};


enum oom_scan_t {
	
OOM_SCAN_OK,		/* scan thread and find its badness */
	
OOM_SCAN_CONTINUE,	/* do not consider thread for oom kill */
	
OOM_SCAN_ABORT,		/* abort the iteration and return */
	
OOM_SCAN_SELECT,	/* always select this thread first */
};

extern struct mutex oom_lock;


static inline void set_current_oom_origin(void) { current->signal->oom_flag_origin = true; }

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david rientjesdavid rientjes1482.35%266.67%
tetsuo handatetsuo handa317.65%133.33%
Total17100.00%3100.00%


static inline void clear_current_oom_origin(void) { current->signal->oom_flag_origin = false; }

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david rientjesdavid rientjes1482.35%266.67%
tetsuo handatetsuo handa317.65%133.33%
Total17100.00%3100.00%


static inline bool oom_task_origin(const struct task_struct *p) { return p->signal->oom_flag_origin; }

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david rientjesdavid rientjes1995.00%150.00%
tetsuo handatetsuo handa15.00%150.00%
Total20100.00%2100.00%

extern void mark_oom_victim(struct task_struct *tsk); #ifdef CONFIG_MMU extern void try_oom_reaper(struct task_struct *tsk); #else
static inline void try_oom_reaper(struct task_struct *tsk) { }

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michal hockomichal hocko11100.00%1100.00%
Total11100.00%1100.00%

#endif extern unsigned long oom_badness(struct task_struct *p, struct mem_cgroup *memcg, const nodemask_t *nodemask, unsigned long totalpages); extern void oom_kill_process(struct oom_control *oc, struct task_struct *p, unsigned int points, unsigned long totalpages, struct mem_cgroup *memcg, const char *message); extern void check_panic_on_oom(struct oom_control *oc, enum oom_constraint constraint, struct mem_cgroup *memcg); extern enum oom_scan_t oom_scan_process_thread(struct oom_control *oc, struct task_struct *task, unsigned long totalpages); extern bool out_of_memory(struct oom_control *oc); extern void exit_oom_victim(struct task_struct *tsk); extern int register_oom_notifier(struct notifier_block *nb); extern int unregister_oom_notifier(struct notifier_block *nb); extern bool oom_killer_disabled; extern bool oom_killer_disable(void); extern void oom_killer_enable(void); extern struct task_struct *find_lock_task_mm(struct task_struct *p);
static inline bool task_will_free_mem(struct task_struct *task) { struct signal_struct *sig = task->signal; /* * A coredumping process may sleep for an extended period in exit_mm(), * so the oom killer cannot assume that the process will promptly exit * and release memory. */ if (sig->flags & SIGNAL_GROUP_COREDUMP) return false; if (!(task->flags & PF_EXITING)) return false; /* Make sure that the whole thread group is going down */ if (!thread_group_empty(task) && !(sig->flags & SIGNAL_GROUP_EXIT)) return false; return true; }

Contributors

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michal hockomichal hocko4259.15%150.00%
oleg nesterovoleg nesterov2940.85%150.00%
Total71100.00%2100.00%

/* sysctls */ extern int sysctl_oom_dump_tasks; extern int sysctl_oom_kill_allocating_task; extern int sysctl_panic_on_oom; #endif /* _INCLUDE_LINUX_OOM_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
david rientjesdavid rientjes25057.08%1546.88%
michal hockomichal hocko8920.32%515.62%
oleg nesterovoleg nesterov296.62%13.12%
alexey dobriyanalexey dobriyan214.79%26.25%
kamezawa hiroyukikamezawa hiroyuki163.65%26.25%
johannes weinerjohannes weiner132.97%39.38%
tetsuo handatetsuo handa71.60%13.12%
andrew mortonandrew morton61.37%13.12%
balasubramani vivekanandanbalasubramani vivekanandan40.91%13.12%
david howellsdavid howells30.68%13.12%
Total438100.00%32100.00%
Directory: include/linux
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