+ memcg-fix-reclaim-result-checks.patch added to -mm tree

+ memcg-fix-reclaim-result-checks.patch added to -mm tree

[akpm]

The patch titled
     memcg: fix reclaim result checks
has been added to the -mm tree.  Its filename is
     memcg-fix-reclaim-result-checks.patch

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/SubmitChecklist when testing your code ***

See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: memcg: fix reclaim result checks
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

check_under_limit logic was wrong and this check should be against
mem_over_limit rather than mem.

Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Jan Blunck <jblunck@suse.de>
Cc: Hirokazu Takahashi <taka@valinux.co.jp>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memcontrol.c |   16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff -puN mm/memcontrol.c~memcg-fix-reclaim-result-checks mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-fix-reclaim-result-checks
+++ a/mm/memcontrol.c
@@ -714,17 +714,17 @@ static int __mem_cgroup_try_charge(struc
 		 * current usage of the cgroup before giving up
 		 *
 		 */
-		if (!do_swap_account &&
-			res_counter_check_under_limit(&mem->res))
-			continue;
-		if (do_swap_account &&
-			res_counter_check_under_limit(&mem->memsw))
-			continue;
+		if (do_swap_account) {
+			if (res_counter_check_under_limit(&mem_over_limit->res) &&
+			    res_counter_check_under_limit(&mem_over_limit->memsw))
+				continue;
+		} else if (res_counter_check_under_limit(&mem_over_limit->res))
+				continue;
 
 		if (!nr_retries--) {
 			if (oom) {
-				mem_cgroup_out_of_memory(mem, gfp_mask);
-				mem->last_oom_jiffies = jiffies;
+				mem_cgroup_out_of_memory(mem_over_limit, gfp_mask);
+				mem_over_limit->last_oom_jiffies = jiffies;
 			}
 			goto nomem;
 		}
_

Patches currently in -mm which might be from kamezawa.hiroyu@jp.fujitsu.com are

origin.patch
memcg-memory-hotplug-fix-for-notifier-callback.patch
vmscan-evict-streaming-io-first.patch
quota-cleanup-move-export_symbol-immediatlely-next-to-the-functions-variables-fix.patch
cgroups-make-cgroup-config-a-submenu.patch
cgroups-documentation-updates.patch
cgroups-remove-some-redundant-null-checks.patch
ns_cgroup-remove-unused-spinlock.patch
memcg-fix-a-typo-in-kconfig.patch
cgroups-add-lock-for-child-cgroups-in-cgroup_post_fork.patch
cgroups-fix-cgroup_iter_next-bug.patch
cgroups-dont-put-struct-cgroupfs_root-protected-by-rcu.patch
cgroups-use-task_lock-for-access-tsk-cgroups-safe-in-cgroup_clone.patch
cgroups-call-find_css_set-safely-in-cgroup_attach_task.patch
devcgroup-use-list_for_each_entry_rcu.patch
memcg-introduce-charge-commit-cancel-style-of-functions.patch
memcg-introduce-charge-commit-cancel-style-of-functions-fix.patch
memcg-fix-gfp_mask-of-callers-of-charge.patch
memcg-simple-migration-handling.patch
memcg-do-not-recalculate-section-unnecessarily-in-init_section_page_cgroup.patch
memcg-move-all-acccounts-to-parent-at-rmdir.patch
memcg-reduce-size-of-mem_cgroup-by-using-nr_cpu_ids.patch
memcg-new-force_empty-to-free-pages-under-group.patch
memcg-handle-swap-caches.patch
memcg-handle-swap-caches-build-fix.patch
memcg-memswap-controller-kconfig.patch
memcg-swap-cgroup-for-remembering-usage.patch
memcg-memswap-controller-core.patch
memcg-memswap-controller-core-make-resize-limit-hold-mutex.patch
memcg-synchronized-lru.patch
memcg-add-mem_cgroup_disabled.patch
memcg-add-mem_cgroup_disabled-fix.patch
memory-cgroup-hierarchy-documentation-v4.patch
memory-cgroup-resource-counters-for-hierarchy-v4.patch
memory-cgroup-resource-counters-for-hierarchy-v4-checkpatch-fixes.patch
memory-cgroup-hierarchical-reclaim-v4.patch
memory-cgroup-hierarchical-reclaim-v4-checkpatch-fixes.patch
memory-cgroup-hierarchy-feature-selector-v4.patch
memory-cgroup-hierarchy-feature-selector-v4-fix.patch
memcontrol-rcu_read_lock-to-protect-mm_match_cgroup.patch
memcg-avoid-unnecessary-system-wide-oom-killer.patch
memcg-fix-reclaim-result-checks.patch
cpuset-rcu_read_lock-to-protect-task_cs.patch