From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757238Ab2IDOVu (ORCPT ); Tue, 4 Sep 2012 10:21:50 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:19542 "EHLO relay.sw.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757157Ab2IDOVt (ORCPT ); Tue, 4 Sep 2012 10:21:49 -0400 From: Glauber Costa To: Cc: , , davej@redhat.com, ben@decadent.org.uk, a.p.zijlstra@chello.nl, pjt@google.com, lennart@poettering.net, kay.sievers@vrfy.org, tj@kernel.org Subject: [RFC 0/5] forced comounts for cgroups. Date: Tue, 4 Sep 2012 18:18:15 +0400 Message-Id: <1346768300-10282-1-git-send-email-glommer@parallels.com> X-Mailer: git-send-email 1.7.11.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, As we have been extensively discussing, the cost and pain points for cgroups come from many places. But at least one of those is the arbitrary nature of hierarchies. Many people, including at least Tejun and me would like this to go away altogether. Problem so far, is breaking compatiblity with existing setups I am proposing here a default-n Kconfig option that will guarantee that the cpu cgroups (for now) will be comounted. I started with them because the cpu/cpuacct division is clearly the worst offender. Also, the default-n is here so distributions will have time to adapt: Forcing this flag to be on without userspace changes will just lead to cgroups failing to mount, which we don't want. Although I've tested it and it works, I haven't compile-tested all possible config combinations. So this is mostly for your eyes. If this gets traction, I'll submit it properly, along with any changes that you might require. Thanks. Glauber Costa (5): cgroup: allow some comounts to be forced. sched: adjust exec_clock to use it as cpu usage metric sched: do not call cpuacct_charge when cpu and cpuacct are comounted cpuacct: do not gather cpuacct statistics when not mounted sched: add cpusets to comounts list include/linux/cgroup.h | 6 ++ init/Kconfig | 23 ++++++++ kernel/cgroup.c | 29 +++++++++- kernel/cpuset.c | 4 ++ kernel/sched/core.c | 149 +++++++++++++++++++++++++++++++++++++++++++++---- kernel/sched/rt.c | 1 + kernel/sched/sched.h | 20 ++++++- 7 files changed, 220 insertions(+), 12 deletions(-) -- 1.7.11.4