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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2011-01-25 15:07:27 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-01-26 10:50:03 +1000
commit01c88e2d6b7330c0cc5867fe2297e7d826e1337d (patch)
tree0a905aa1558af7fd401d768ead121e2b11a4a2f4
parent28bd65781c848d95ba6a7f58b5c4b8265a804ec6 (diff)
memcg: fix account leak at failure of memsw acconting
Commit 4b53433468 ("memcg: clean up try_charge main loop") removes a cancel of charge at case: memory charge-> success. mem+swap charge-> failure. This leaks usage of memory. Fix it. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@in.ibm.com> Cc: <stable@kernel.org> [2.6.36+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/memcontrol.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4fcf47a6255..1eb1a04f874 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1832,6 +1832,7 @@ static int __mem_cgroup_do_charge(struct mem_cgroup *mem, gfp_t gfp_mask,
if (likely(!ret))
return CHARGE_OK;
+ res_counter_uncharge(&mem->res, csize);
mem_over_limit = mem_cgroup_from_res_counter(fail_res, memsw);
flags |= MEM_CGROUP_RECLAIM_NOSWAP;
} else