Hi, This patch-set is a part of preparations for kmemcg re-parenting. It targets at simplifying kmemcg work-flows and synchronization. First, it removes async per memcg cache destruction (see patches 1, 2). Now caches are only destroyed on memcg offline. That means the caches that are not empty on memcg offline will be leaked. However, they are already leaked, because memcg_cache_params::nr_pages normally never drops to 0 so the destruction work is never scheduled except kmem_cache_shrink is called explicitly. In the future I'm planning reaping such dead caches on vmpressure or periodically. Second, it substitutes per memcg slab_caches_mutex's with the global memcg_slab_mutex, which should be taken during the whole per memcg cache creation/destruction path before the slab_mutex (see patch 3). This greatly simplifies synchronization among various per memcg cache creation/destruction paths. I'm still not quite sure about the end picture, in particular I don't know whether we should reap dead memcgs' kmem caches periodically or try to merge them with their parents (see https://lkml.org/lkml/2014/4/20/38 for more details), but whichever way we choose, this set looks like a reasonable change to me, because it greatly simplifies kmemcg work-flows and eases further development. Changes in v3: - rebase on top of mmotm 2014-04-22-15-20 (minor, so I preserved Johannes' ACKs) Changes in v2: - substitute per memcg slab_caches_mutex's with the global memcg_slab_mutex and re-split the set. v2: https://lkml.org/lkml/2014/4/18/42 v1: https://lkml.org/lkml/2014/4/9/298 Thanks, Vladimir Davydov (3): memcg, slab: do not schedule cache destruction when last page goes away memcg, slab: merge memcg_{bind,release}_pages to memcg_{un}charge_slab memcg, slab: simplify synchronization scheme include/linux/memcontrol.h | 15 +-- include/linux/slab.h | 8 +- mm/memcontrol.c | 231 +++++++++++++++----------------------------- mm/slab.c | 2 - mm/slab.h | 28 +----- mm/slab_common.c | 23 ++--- mm/slub.c | 2 - 7 files changed, 93 insertions(+), 216 deletions(-) -- 1.7.10.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>