[patch 05/12] mm: memcontrol: reclaim at least once for __GFP_NORETRY

Johannes Weiner
2014-06-16T19:54:25Z

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>
---
mm/memcontrol.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 52550bbff1ef..9c646b9b56f4 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -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
--
2.0.0