From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f173.google.com (mail-wi0-f173.google.com [209.85.212.173]) by kanga.kvack.org (Postfix) with ESMTP id 471236B0036 for ; Sat, 20 Sep 2014 16:00:46 -0400 (EDT) Received: by mail-wi0-f173.google.com with SMTP id r20so1063817wiv.0 for ; Sat, 20 Sep 2014 13:00:45 -0700 (PDT) Received: from gum.cmpxchg.org (gum.cmpxchg.org. [85.214.110.215]) by mx.google.com with ESMTPS id d4si1660407wic.74.2014.09.20.13.00.44 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 20 Sep 2014 13:00:45 -0700 (PDT) From: Johannes Weiner Subject: [patch 0/3] mm: memcontrol: eliminate charge reparenting Date: Sat, 20 Sep 2014 16:00:32 -0400 Message-Id: <1411243235-24680-1-git-send-email-hannes@cmpxchg.org> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: Michal Hocko , Vladimir Davydov , Greg Thelen , Tejun Heo , cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Hi, we've come a looong way when it comes to the basic cgroups model, and the recent changes there open up a lot of opportunity to make drastic simplifications to memory cgroups as well. The decoupling of css from the user-visible cgroup, word-sized per-cpu css reference counters, and css iterators that include offlined groups means we can take per-charge css references, continue to reclaim from offlined groups, and so get rid of the error-prone charge reparenting. Combined with the higher-order reclaim fixes, lockless page counters, and memcg iterator simplification I sent on Friday, the memory cgroup core code is finally no longer the biggest file in mm/. Yay! These patches are based on mmotm + the above-mentioned changes + Tj's percpu-refcount conversion to atomic_long_t. Thanks! include/linux/cgroup.h | 26 +++ include/linux/percpu-refcount.h | 43 ++++- mm/memcontrol.c | 337 ++------------------------------------ 3 files changed, 75 insertions(+), 331 deletions(-) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org