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mm, oom: organize oom context into struct

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There are essential elements to an oom context that are passed around to
multiple functions.

Organize these elements into a new struct, struct oom_control, that
specifies the context for an oom condition.

This patch introduces no functional change.

Signed-off-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Rientjes 2015-09-08 15:00:36 -07:00 • committed by Linus Torvalds
parent 2c0b80d463
commit 6e0fc46dc2
5 changed files with 98 additions and 80 deletions
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25
include/linux/oom.h
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@ -12,6 +12,14 @@ struct notifier_block;
struct mem_cgroup;
struct task_struct;
struct oom_control {
struct zonelist *zonelist;
nodemask_t *nodemask;
gfp_t gfp_mask;
int order;
bool force_kill;
};
/*
* Types of limitations to the nodes from which allocations may occur
*/
@ -57,21 +65,18 @@ extern unsigned long oom_badness(struct task_struct *p,
extern int oom_kills_count(void);
extern void note_oom_kill(void);
extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order,
extern void oom_kill_process(struct oom_control *oc, struct task_struct *p,
unsigned int points, unsigned long totalpages,
struct mem_cgroup *memcg, nodemask_t *nodemask,
const char *message);
struct mem_cgroup *memcg, const char *message);
extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask,
int order, const nodemask_t *nodemask,
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 task_struct *task,
unsigned long totalpages, const nodemask_t *nodemask,
bool force_kill);
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 zonelist *zonelist, gfp_t gfp_mask,
int order, nodemask_t *mask, bool force_kill);
extern bool out_of_memory(struct oom_control *oc);
extern void exit_oom_victim(void);