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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 <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Johannes Weiner 2014-08-06 16:05:47 -07:00 • committed by Linus Torvalds
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 @@ retry:
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