The commit is pushed to "branch-rh7-3.10.0-229.7.2-ovz" and will appear at
https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-229.7.2.vz7.6.4
------>
commit 8aee40dd982b476c208aee78e19cd756f2dac8a7
Author: Johannes Weiner <han...@cmpxchg.org>
Date: Mon Aug 31 17:09:47 2015 +0400
ms/mm: memcontrol: reclaim at least once for __GFP_NORETRY
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 <han...@cmpxchg.org>
Acked-by: Michal Hocko <mho...@suse.cz>
Cc: Hugh Dickins <hu...@google.com>
Cc: Tejun Heo <t...@kernel.org>
Cc: Vladimir Davydov <vdavy...@parallels.com>
Signed-off-by: Andrew Morton <a...@linux-foundation.org>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
(cherry picked from commit 28c34c291e746aab1c2bfd6d6609b2e47fa0978b)
Signed-off-by: Vladimir Davydov <vdavy...@parallels.com>
Conflicts:
mm/memcontrol.c
---
mm/memcontrol.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7fc2931..52c7871 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2754,11 +2754,6 @@ static int mem_cgroup_do_charge(struct mem_cgroup
*memcg, gfp_t gfp_mask,
return CHARGE_WOULDBLOCK;
}
- if (gfp_mask & __GFP_NORETRY) {
- mem_cgroup_inc_failcnt(mem_over_limit, gfp_mask, nr_pages);
- return CHARGE_NOMEM;
- }
-
ret = mem_cgroup_reclaim(mem_over_limit, gfp_mask, flags);
if (mem_cgroup_margin(mem_over_limit) >= nr_pages)
return CHARGE_RETRY;
@@ -2787,6 +2782,9 @@ static int mem_cgroup_do_charge(struct mem_cgroup *memcg,
gfp_t gfp_mask,
mem_cgroup_inc_failcnt(mem_over_limit, gfp_mask, nr_pages);
+ if (gfp_mask & __GFP_NORETRY)
+ return CHARGE_NOMEM;
+
/* check OOM */
if (!mem_cgroup_handle_oom(mem_over_limit, gfp_mask, get_order(csize)))
return CHARGE_OOM_DIE;
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