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Commit 8989e4c7 authored by David Rientjes's avatar David Rientjes Committed by Linus Torvalds
Browse files

mm, oom: add description of struct oom_control 



Describe the purpose of struct oom_control and what each member does.

Also make gfp_mask and order const since they are never manipulated or
passed to functions that discard the qualifier.

Signed-off-by: default avatarDavid Rientjes <rientjes@google.com>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 071a4bef

include/linux/oom.h

+17 −3
Original line number Diff line number Diff line
@@ -12,11 +12,25 @@ 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;

	gfp_t		gfp_mask;

	int		order;



	/* 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;

};



/*