From 3e6b11df245180949938734bc192eaf32f3a06b3 Mon Sep 17 00:00:00 2001 From: Andrey Vagin Date: Tue, 13 Aug 2013 16:00:47 -0700 Subject: memcg: don't initialize kmem-cache destroying work for root caches struct memcg_cache_params has a union. Different parts of this union are used for root and non-root caches. A part with destroying work is used only for non-root caches. I fixed the same problem in another place v3.9-rc1-16204-gf101a94, but didn't notice this one. This patch fixes the kernel panic: [ 46.848187] BUG: unable to handle kernel paging request at 000000fffffffeb8 [ 46.849026] IP: [] kmem_cache_destroy_memcg_children+0x6c/0xc0 [ 46.849092] PGD 0 [ 46.849092] Oops: 0000 [#1] SMP ... Signed-off-by: Andrey Vagin Cc: Glauber Costa Cc: Johannes Weiner Acked-by: Michal Hocko Cc: Balbir Singh Cc: KAMEZAWA Hiroyuki Cc: Konstantin Khlebnikov Cc: [3.9.x] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'mm/memcontrol.c') diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c290a1cf3862..c5792a5d87ce 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3195,11 +3195,11 @@ int memcg_register_cache(struct mem_cgroup *memcg, struct kmem_cache *s, if (!s->memcg_params) return -ENOMEM; - INIT_WORK(&s->memcg_params->destroy, - kmem_cache_destroy_work_func); if (memcg) { s->memcg_params->memcg = memcg; s->memcg_params->root_cache = root_cache; + INIT_WORK(&s->memcg_params->destroy, + kmem_cache_destroy_work_func); } else s->memcg_params->is_root_cache = true; -- cgit v1.2.2 From 07555ac144bbf45b1751340c6ee75da1f4e5756d Mon Sep 17 00:00:00 2001 From: Michal Hocko Date: Thu, 22 Aug 2013 16:35:46 -0700 Subject: memcg: get rid of swapaccount leftovers The swapaccount kernel parameter without any values has been removed by commit a2c8990aed5a ("memsw: remove noswapaccount kernel parameter") but it seems that we didn't get rid of all the left overs. Make sure that menuconfig help text and kernel-parameters.txt are clear about value for the paramter and remove the stalled comment which is not very much useful on its own. Signed-off-by: Michal Hocko Reported-by: Gergely Risko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 1 - 1 file changed, 1 deletion(-) (limited to 'mm/memcontrol.c') diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c5792a5d87ce..0878ff7c26a9 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -6969,7 +6969,6 @@ struct cgroup_subsys mem_cgroup_subsys = { #ifdef CONFIG_MEMCG_SWAP static int __init enable_swap_account(char *s) { - /* consider enabled if no parameter or 1 is given */ if (!strcmp(s, "1")) really_do_swap_account = 1; else if (!strcmp(s, "0")) -- cgit v1.2.2