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Date: Thu, 23 Feb 2012 17:53:19 +0400 From: Konstantin Khlebnikov <khlebnikov@...nvz.org> To: Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, Johannes Weiner <hannes@...xchg.org>, Andrew Morton <akpm@...ux-foundation.org>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Cc: Andi Kleen <andi@...stfloor.org> Subject: [PATCH v3 19/21] memcg: check lru vectors emptiness in pre-destroy We must abort cgroup destroying if it still not empty, resource counter cannot catch isolated uncharged pages. Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org> --- mm/memcontrol.c | 10 +++++++++- 1 files changed, 9 insertions(+), 1 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 4de8044..fbeff85 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4859,8 +4859,16 @@ free_out: static int mem_cgroup_pre_destroy(struct cgroup *cont) { struct mem_cgroup *memcg = mem_cgroup_from_cont(cont); + int ret; + + ret = mem_cgroup_force_empty(memcg, false); + if (ret) + return ret; - return mem_cgroup_force_empty(memcg, false); + if (mem_cgroup_nr_lru_pages(memcg, -1)) + return -EBUSY; + + return 0; } static void mem_cgroup_destroy(struct cgroup *cont) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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