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mm: memcontrol: reclaim at least once for __GFP_NORETRY

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Currently, __GFP_NORETRY tries charging once and gives up before even
trying to reclaim.  Bring the behavior on par with the page allocator
and reclaim at least once before giving up.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vladimir Davydov <vdavydov@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2014-08-06 16:05:47 -07:00 committed by Linus Torvalds
parent 06b078fc06
commit 28c34c291e
1 changed files with 3 additions and 3 deletions
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6
mm/memcontrol.c
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@ -2613,13 +2613,13 @@ static int mem_cgroup_try_charge(struct mem_cgroup *memcg,
if (!(gfp_mask & __GFP_WAIT))
goto nomem;
if (gfp_mask & __GFP_NORETRY)
goto nomem;
nr_reclaimed = mem_cgroup_reclaim(mem_over_limit, gfp_mask, flags);
if (mem_cgroup_margin(mem_over_limit) >= batch)
goto retry;
if (gfp_mask & __GFP_NORETRY)
goto nomem;
/*
* Even though the limit is exceeded at this point, reclaim
* may have been able to free some pages. Retry the charge