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memcg: free entries in soft_limit_tree if allocation fails 

If we are not able to allocate tree nodes for all NUMA nodes then we
should release those that were allocated.

Signed-off-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michal Hocko 2012-01-12 17:18:50 -08:00 committed by Linus Torvalds
parent 9fb4b7cc07
commit c3cecc6834
1 changed files with 11 additions and 1 deletions
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12
mm/memcontrol.c
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@ -4960,7 +4960,7 @@ static int mem_cgroup_soft_limit_tree_init(void)
tmp = -1;
rtpn = kzalloc_node(sizeof(*rtpn), GFP_KERNEL, tmp);
if (!rtpn)
return 1;
goto err_cleanup;
soft_limit_tree.rb_tree_per_node[node] = rtpn;
@ -4971,6 +4971,16 @@ static int mem_cgroup_soft_limit_tree_init(void)
}
}
return 0;
err_cleanup:
for_each_node_state(node, N_POSSIBLE) {
if (!soft_limit_tree.rb_tree_per_node[node])
break;
kfree(soft_limit_tree.rb_tree_per_node[node]);
soft_limit_tree.rb_tree_per_node[node] = NULL;
}
return 1;
}
static struct cgroup_subsys_state * __ref