From: Li Zefan <lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
To: Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Cgroups <cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: [PATCH 0/5] cpuacct, cgroup: Remove cgroup_subsys.active
Date: Thu, 28 Mar 2013 15:20:04 +0800 [thread overview]
Message-ID: <5153EF24.3040608@huawei.com> (raw)
cpuacct is the only user of cgroup_subsys.active flag.
The flag is needed because cpuacct_charge() and cpuacct_account_field() can
be called when cpuacct hasn't been initialized during system bootup.
This patch initializes cpuacct earlier, and the result is we don't have
to check the flag in scheduler hot path.
Note, this patchset is based on "[PATCH 0/7] sched: Split cpuacct"
(just because there're code conflicts)
http://lkml.org/lkml/2013/3/28/1
0001-cpuacct-allocate-per_cpu-cpuusage-for-root-cpuacct-s.patch
0002-cpuacct-Initialize-root-cpuacct-earlier.patch
0003-cpuacct-Initialize-cpuacct-subsystem-earlier.patch
0004-cpuacct-No-need-to-check-subsys-active-state.patch
0005-cgroup-Remove-subsys.active-flag.patch
--
include/linux/cgroup.h | 1 -
kernel/cgroup.c | 3 ---
kernel/sched/core.c | 2 --
kernel/sched/cpuacct.c | 30 +++++++++++-------------------
kernel/sched/cpuacct.h | 5 -----
5 files changed, 11 insertions(+), 30 deletions(-)
next reply other threads:[~2013-03-28 7:20 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-28 7:20 Li Zefan [this message]
2013-03-28 7:20 ` [PATCH 2/5] cpuacct: Initialize root cpuacct earlier Li Zefan
2013-03-28 7:21 ` [PATCH 4/5] cpuacct: No need to check subsys active state Li Zefan
[not found] ` <5153EF24.3040608-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-03-28 7:20 ` [PATCH 1/5] cpuacct: Allocate per_cpu cpuusage for root cpuacct statically Li Zefan
2013-03-28 7:21 ` [PATCH 3/5] cpuacct: Initialize cpuacct subsystem earlier Li Zefan
2013-03-28 7:21 ` [PATCH 5/5] cgroup: Remove subsys.active flag Li Zefan
[not found] ` <5153EF8D.2080502-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2013-03-28 18:19 ` Tejun Heo
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