3.10-stable review patch. If anyone has any objections, please let me know.
------------------ From: Andrey Vagin <[email protected]> commit 3e6b11df245180949938734bc192eaf32f3a06b3 upstream. 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: [<ffffffff811a484c>] kmem_cache_destroy_memcg_children+0x6c/0xc0 [ 46.849092] PGD 0 [ 46.849092] Oops: 0000 [#1] SMP ... Signed-off-by: Andrey Vagin <[email protected]> Cc: Glauber Costa <[email protected]> Cc: Johannes Weiner <[email protected]> Acked-by: Michal Hocko <[email protected]> Cc: Balbir Singh <[email protected]> Cc: KAMEZAWA Hiroyuki <[email protected]> Cc: Konstantin Khlebnikov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- mm/memcontrol.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3186,11 +3186,11 @@ int memcg_register_cache(struct mem_cgro 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
