From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752406AbbIPBvb (ORCPT ); Tue, 15 Sep 2015 21:51:31 -0400 Received: from mail-yk0-f171.google.com ([209.85.160.171]:35274 "EHLO mail-yk0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752011AbbIPBv2 (ORCPT ); Tue, 15 Sep 2015 21:51:28 -0400 From: Tejun Heo To: lizefan@huawei.com, hannes@cmpxchg.org Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com Subject: [PATCHSET] cgroup: use static_keys for subsystem enabled and on_dfl tests Date: Tue, 15 Sep 2015 21:51:21 -0400 Message-Id: <1442368285-16306-1-git-send-email-tj@kernel.org> X-Mailer: git-send-email 2.4.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org cgroup_subsys->disabled and cgroup_on_dfl() tests are likely to be used in hot paths and seldom change. The former is set once during boot and the latter only when a controller is migrated between the default hierarchy and traditional ones. This patchset makes these tests static_key based and contains the following four patches. 0001-jump_label-make-static_key_enabled-work-on-static_ke.patch 0002-cgroup-implement-static_key-based-cgroup_subsys_enab.patch 0003-cgroup-replace-cgroup_subsys-disabled-tests-with-cgr.patch 0004-cgroup-replace-cgroup_on_dfl-tests-in-controllers-wi.patch 0001 is a prep patch in jump_label. 0002 adds the needed static_keys. 0003-0004 convert the existing usages and drop the old tests. This patchset is on top of v4.3-rc1 and is availalbe in the following git branch. git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-jump-labels diffstat follows. Thanks. block/blk-throttle.c | 2 block/cfq-iosched.c | 4 - include/linux/cgroup-defs.h | 1 include/linux/cgroup.h | 79 +++++++--------------------- include/linux/hugetlb_cgroup.h | 4 - include/linux/jump_label.h | 18 +++--- include/linux/memcontrol.h | 4 - kernel/cgroup.c | 113 ++++++++++++++++++++++++++++++++++++++--- kernel/cpuset.c | 23 ++++---- mm/memcontrol.c | 4 - 10 files changed, 157 insertions(+), 95 deletions(-) -- tejun