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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2011-06-15 15:08:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-06-15 20:04:01 -0700
commit7ae534d074e01e54d5cfbc9734b73fdfc855501f (patch)
tree8c815762779fd79cc83db788aa29e6239212c3f4 /mm
parent733eda7ac316cd4e550fa096e4ed42356dc546e7 (diff)
downloadblackbird-op-linux-7ae534d074e01e54d5cfbc9734b73fdfc855501f.tar.gz
blackbird-op-linux-7ae534d074e01e54d5cfbc9734b73fdfc855501f.zip
memcg: fix wrong check of noswap with softlimit
Hierarchical reclaim doesn't swap out if memsw and resource limits are thye same (memsw_is_minimum == true) because we would hit mem+swap limit anyway (during hard limit reclaim). If it comes to the soft limit we shouldn't consider memsw_is_minimum at all because it doesn't make much sense. Either the soft limit is bellow the hard limit and then we cannot hit mem+swap limit or the direct reclaim takes a precedence. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: Michal Hocko <mhocko@suse.cz> Acked-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 02a7947608ad..0b1a32cbd74d 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1663,7 +1663,7 @@ static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
excess = res_counter_soft_limit_excess(&root_mem->res) >> PAGE_SHIFT;
/* If memsw_is_minimum==1, swap-out is of-no-use. */
- if (root_mem->memsw_is_minimum)
+ if (!check_soft && root_mem->memsw_is_minimum)
noswap = true;
while (1) {
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