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From: Tejun Heo <tj@kernel.org>
To: lizefan@huawei.com
Cc: cgroups@vger.kernel.org, mingo@redhat.com, peterz@infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCHSET] cgroup, sched: restructure threadgroup locking and replace it with a percpu_rwsem
Date: Tue, 26 May 2015 20:34:07 -0400	[thread overview]
Message-ID: <20150527003407.GM7099@htj.duckdns.org> (raw)
In-Reply-To: <1431549318-16756-1-git-send-email-tj@kernel.org>

On Wed, May 13, 2015 at 04:35:15PM -0400, Tejun Heo wrote:
> threadgroup locking was added because cgroup needs threadgroups to
> stay stable across attach operations.  It was implemented as a
> per-signal_struct generic locking mechanism so that other users which
> require threadgroups stable across blocking operations can use it too;
> however, it hasn't grown any other use cases and still conditionalized
> on CONFIG_CGROUPS.

Applying to cgroups/for-4.2.

Thanks.

-- 
tejun

WARNING: multiple messages have this Message-ID (diff)
From: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
	peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCHSET] cgroup, sched: restructure threadgroup locking and replace it with a percpu_rwsem
Date: Tue, 26 May 2015 20:34:07 -0400	[thread overview]
Message-ID: <20150527003407.GM7099@htj.duckdns.org> (raw)
In-Reply-To: <1431549318-16756-1-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

On Wed, May 13, 2015 at 04:35:15PM -0400, Tejun Heo wrote:
> threadgroup locking was added because cgroup needs threadgroups to
> stay stable across attach operations.  It was implemented as a
> per-signal_struct generic locking mechanism so that other users which
> require threadgroups stable across blocking operations can use it too;
> however, it hasn't grown any other use cases and still conditionalized
> on CONFIG_CGROUPS.

Applying to cgroups/for-4.2.

Thanks.

-- 
tejun

  parent reply	other threads:[~2015-05-27  0:34 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-13 20:35 [PATCHSET] cgroup, sched: restructure threadgroup locking and replace it with a percpu_rwsem Tejun Heo
2015-05-13 20:35 ` Tejun Heo
2015-05-13 20:35 ` [PATCH 1/3] sched, cgroup: reorganize threadgroup locking Tejun Heo
2015-05-13 20:35   ` Tejun Heo
2015-05-14  1:09   ` Sergey Senozhatsky
2015-05-14  1:09     ` Sergey Senozhatsky
2015-05-14 15:17     ` Tejun Heo
2015-05-14 15:17       ` Tejun Heo
2015-05-13 20:35 ` [PATCH 2/3] sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem Tejun Heo
2015-05-19 15:16   ` Peter Zijlstra
2015-05-19 15:51     ` Tejun Heo
2015-05-19 15:51       ` Tejun Heo
2015-05-20 10:05       ` Zefan Li
2015-05-20 10:05         ` Zefan Li
2015-05-21 20:39         ` Tejun Heo
2015-05-21 20:39           ` Tejun Heo
2015-05-24  2:35           ` Zefan Li
2015-05-24  2:35             ` Zefan Li
2015-05-13 20:35 ` [PATCH 3/3] cgroup: simplify threadgroup locking Tejun Heo
2015-05-18 16:34 ` [PATCHSET] cgroup, sched: restructure threadgroup locking and replace it with a percpu_rwsem Tejun Heo
2015-05-18 16:34   ` Tejun Heo
2015-05-18 20:06   ` Peter Zijlstra
2015-05-18 20:06     ` Peter Zijlstra
2015-05-27  0:34 ` Tejun Heo [this message]
2015-05-27  0:34   ` Tejun Heo

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