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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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10
mm/page_alloc.c
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@@ -2693,6 +2693,13 @@ static inline struct page *
__alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order,
const struct alloc_context *ac, unsigned long *did_some_progress)
{
struct oom_control oc = {
.zonelist = ac->zonelist,
.nodemask = ac->nodemask,
.gfp_mask = gfp_mask,
.order = order,
.force_kill = false,
};
struct page *page;
*did_some_progress = 0;
@@ -2744,8 +2751,7 @@ __alloc_pages_may_oom(gfp_t gfp_mask, unsigned int order,
goto out;
}
/* Exhausted what can be done so it's blamo time */
if (out_of_memory(ac->zonelist, gfp_mask, order, ac->nodemask, false)
|| WARN_ON_ONCE(gfp_mask & __GFP_NOFAIL))
if (out_of_memory(&oc) || WARN_ON_ONCE(gfp_mask & __GFP_NOFAIL))
*did_some_progress = 1;
out:
mutex_unlock(&oom_lock);