876aafbfd9
By globally defining check_panic_on_oom(), the memcg oom handler can be moved entirely to mm/memcontrol.c. This removes the ugly #ifdef in the oom killer and cleans up the code. Signed-off-by: David Rientjes <rientjes@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Oleg Nesterov <oleg@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
#ifndef __INCLUDE_LINUX_OOM_H
|
|
#define __INCLUDE_LINUX_OOM_H
|
|
|
|
/*
|
|
* /proc/<pid>/oom_adj is deprecated, see
|
|
* Documentation/feature-removal-schedule.txt.
|
|
*
|
|
* /proc/<pid>/oom_adj set to -17 protects from the oom-killer
|
|
*/
|
|
#define OOM_DISABLE (-17)
|
|
/* inclusive */
|
|
#define OOM_ADJUST_MIN (-16)
|
|
#define OOM_ADJUST_MAX 15
|
|
|
|
/*
|
|
* /proc/<pid>/oom_score_adj set to OOM_SCORE_ADJ_MIN disables oom killing for
|
|
* pid.
|
|
*/
|
|
#define OOM_SCORE_ADJ_MIN (-1000)
|
|
#define OOM_SCORE_ADJ_MAX 1000
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/types.h>
|
|
#include <linux/nodemask.h>
|
|
|
|
struct zonelist;
|
|
struct notifier_block;
|
|
struct mem_cgroup;
|
|
struct task_struct;
|
|
|
|
/*
|
|
* 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 void compare_swap_oom_score_adj(int old_val, int new_val);
|
|
extern int test_set_oom_score_adj(int new_val);
|
|
|
|
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 task_struct *p, gfp_t gfp_mask, int order,
|
|
unsigned int points, unsigned long totalpages,
|
|
struct mem_cgroup *memcg, nodemask_t *nodemask,
|
|
const char *message);
|
|
|
|
extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
|
|
extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags);
|
|
|
|
extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
|
|
int order, const nodemask_t *nodemask);
|
|
|
|
extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task,
|
|
unsigned long totalpages, const nodemask_t *nodemask,
|
|
bool force_kill);
|
|
extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
|
|
int order);
|
|
|
|
extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask,
|
|
int order, nodemask_t *mask, bool force_kill);
|
|
extern int register_oom_notifier(struct notifier_block *nb);
|
|
extern int unregister_oom_notifier(struct notifier_block *nb);
|
|
|
|
extern bool oom_killer_disabled;
|
|
|
|
static inline void oom_killer_disable(void)
|
|
{
|
|
oom_killer_disabled = true;
|
|
}
|
|
|
|
static inline void oom_killer_enable(void)
|
|
{
|
|
oom_killer_disabled = false;
|
|
}
|
|
|
|
extern struct task_struct *find_lock_task_mm(struct task_struct *p);
|
|
|
|
/* sysctls */
|
|
extern int sysctl_oom_dump_tasks;
|
|
extern int sysctl_oom_kill_allocating_task;
|
|
extern int sysctl_panic_on_oom;
|
|
#endif /* __KERNEL__*/
|
|
#endif /* _INCLUDE_LINUX_OOM_H */
|