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authorHillf Danton <dhillf@gmail.com>2011-12-19 17:11:57 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2012-01-06 14:17:16 -0800
commitb38fb531508f5c250e9e52f6dc3432db32c315ad (patch)
tree6808cf9bf6ede24c73a616762cb534ac949f4e30 /mm
parentdb3be35a9693545112a3d22f35efe31bc6efab06 (diff)
memcg: keep root group unchanged if creation fails
commit a41c58a6665cc995e237303b05db42100b71b65e upstream. If the request is to create non-root group and we fail to meet it, we should leave the root unchanged. Signed-off-by: Hillf Danton <dhillf@gmail.com> Signed-off-by: Hugh Dickins <hughd@google.com> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Acked-by: Michal Hocko <mhocko@suse.cz> Cc: Balbir Singh <bsingharora@gmail.com> Cc: David Rientjes <rientjes@google.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'mm')
-rw-r--r--mm/memcontrol.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 3508777837c7..afde618f9895 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4898,9 +4898,9 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
int cpu;
enable_swap_cgroup();
parent = NULL;
- root_mem_cgroup = mem;
if (mem_cgroup_soft_limit_tree_init())
goto free_out;
+ root_mem_cgroup = mem;
for_each_possible_cpu(cpu) {
struct memcg_stock_pcp *stock =
&per_cpu(memcg_stock, cpu);
@@ -4939,7 +4939,6 @@ mem_cgroup_create(struct cgroup_subsys *ss, struct cgroup *cont)
return &mem->css;
free_out:
__mem_cgroup_free(mem);
- root_mem_cgroup = NULL;
return ERR_PTR(error);
}