Messages in this thread Patch in this message |  | | | Date | Sun, 11 Dec 2011 09:19:12 +0800 | | Subject | [PATCH] mm: memcg: keep root group unchanged if fail to create new | | From | Hillf Danton <> |
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If the request is not to create root group and we fail to meet it, we'd leave the root unchanged.
Signed-off-by: Hillf Danton <dhillf@gmail.com> --- --- a/mm/memcontrol.c Fri Dec 9 21:57:40 2011 +++ b/mm/memcontrol.c Sun Dec 11 09:04:48 2011 @@ -4849,8 +4849,10 @@ mem_cgroup_create(struct cgroup_subsys * enable_swap_cgroup(); parent = NULL; root_mem_cgroup = memcg; - if (mem_cgroup_soft_limit_tree_init()) + if (mem_cgroup_soft_limit_tree_init()) { + root_mem_cgroup = NULL; goto free_out; + } for_each_possible_cpu(cpu) { struct memcg_stock_pcp *stock = &per_cpu(memcg_stock, cpu); @@ -4888,7 +4890,6 @@ mem_cgroup_create(struct cgroup_subsys * return &memcg->css; free_out: __mem_cgroup_free(memcg); - root_mem_cgroup = NULL; return ERR_PTR(error); }
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