From: Li Zefan <lizf-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
To: Mandeep Singh Baines <msb-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Cc: Frederic Weisbecker
<fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Paul Menage <paul-inf54ven1CmVyaH7bEyXVA@public.gmane.org>
Subject: Re: [PATCH 2/3] cgroup: replace tasklist_lock with rcu_read_lock
Date: Thu, 05 Jan 2012 10:09:26 +0800 [thread overview]
Message-ID: <4F050656.3090609@cn.fujitsu.com> (raw)
In-Reply-To: <1325654312-32477-2-git-send-email-msb-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Mandeep Singh Baines wrote:
> We can replace the tasklist_lock in cgroup_attach_proc with an
> rcu_read_lock.
>
> Changes in V4:
> * https://lkml.org/lkml/2011/12/23/284 (Frederic Weisbecker)
> * Minimize size of rcu_read_lock critical section
> * Add comment
> * https://lkml.org/lkml/2011/12/26/136 (Li Zefan)
> * Split into two patches
> Changes in V3:
> * https://lkml.org/lkml/2011/12/22/419 (Frederic Weisbecker)
> * Add an rcu_read_lock to protect against exit
> Changes in V2:
> * https://lkml.org/lkml/2011/12/22/86 (Tejun Heo)
> * Use a goto instead of returning -EAGAIN
>
> Suggested-by: Frederic Weisbecker <fweisbec-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> Signed-off-by: Mandeep Singh Baines <msb-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
Acked-by: Li Zefan <lizf-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
> Cc: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Cc: Li Zefan <lizf-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
> Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
> Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
> Cc: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> Cc: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
> Cc: Paul Menage <paul-inf54ven1CmVyaH7bEyXVA@public.gmane.org>
> ---
> kernel/cgroup.c | 10 +++++++---
> 1 files changed, 7 insertions(+), 3 deletions(-)
WARNING: multiple messages have this Message-ID (diff)
From: Li Zefan <lizf@cn.fujitsu.com>
To: Mandeep Singh Baines <msb@chromium.org>
Cc: Tejun Heo <tj@kernel.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
linux-kernel@vger.kernel.org,
containers@lists.linux-foundation.org, cgroups@vger.kernel.org,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Oleg Nesterov <oleg@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Paul Menage <paul@paulmenage.org>
Subject: Re: [PATCH 2/3] cgroup: replace tasklist_lock with rcu_read_lock
Date: Thu, 05 Jan 2012 10:09:26 +0800 [thread overview]
Message-ID: <4F050656.3090609@cn.fujitsu.com> (raw)
In-Reply-To: <1325654312-32477-2-git-send-email-msb@chromium.org>
Mandeep Singh Baines wrote:
> We can replace the tasklist_lock in cgroup_attach_proc with an
> rcu_read_lock.
>
> Changes in V4:
> * https://lkml.org/lkml/2011/12/23/284 (Frederic Weisbecker)
> * Minimize size of rcu_read_lock critical section
> * Add comment
> * https://lkml.org/lkml/2011/12/26/136 (Li Zefan)
> * Split into two patches
> Changes in V3:
> * https://lkml.org/lkml/2011/12/22/419 (Frederic Weisbecker)
> * Add an rcu_read_lock to protect against exit
> Changes in V2:
> * https://lkml.org/lkml/2011/12/22/86 (Tejun Heo)
> * Use a goto instead of returning -EAGAIN
>
> Suggested-by: Frederic Weisbecker <fweisbec@gmail.com>
> Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
> Cc: Tejun Heo <tj@kernel.org>
> Cc: Li Zefan <lizf@cn.fujitsu.com>
> Cc: containers@lists.linux-foundation.org
> Cc: cgroups@vger.kernel.org
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> Cc: Oleg Nesterov <oleg@redhat.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Paul Menage <paul@paulmenage.org>
> ---
> kernel/cgroup.c | 10 +++++++---
> 1 files changed, 7 insertions(+), 3 deletions(-)
next prev parent reply other threads:[~2012-01-05 2:09 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-04 5:18 [PATCH 1/3] cgroup: simplify double-check locking in cgroup_attach_proc Mandeep Singh Baines
2012-01-04 5:18 ` Mandeep Singh Baines
[not found] ` <1325654312-32477-1-git-send-email-msb-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2012-01-04 5:18 ` [PATCH 2/3] cgroup: replace tasklist_lock with rcu_read_lock Mandeep Singh Baines
2012-01-04 5:18 ` Mandeep Singh Baines
[not found] ` <1325654312-32477-2-git-send-email-msb-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2012-01-04 10:38 ` Frederic Weisbecker
2012-01-04 10:38 ` Frederic Weisbecker
2012-01-05 2:09 ` Li Zefan [this message]
2012-01-05 2:09 ` Li Zefan
2012-01-21 0:00 ` Tejun Heo
2012-01-21 0:00 ` Tejun Heo
2012-01-21 0:00 ` Tejun Heo
2012-01-04 5:18 ` Mandeep Singh Baines
2012-01-04 5:18 ` [PATCH 3/3] cgroup: remove extra calls to find_existing_css_set Mandeep Singh Baines
2012-01-04 5:18 ` Mandeep Singh Baines
2012-01-04 5:18 ` Mandeep Singh Baines
[not found] ` <1325654312-32477-3-git-send-email-msb-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
2012-01-05 2:10 ` Li Zefan
2012-01-05 2:10 ` Li Zefan
[not found] ` <4F0506B1.1070909-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
2012-01-05 17:35 ` Tejun Heo
2012-01-05 17:35 ` Tejun Heo
2012-01-05 17:35 ` Tejun Heo
2012-01-05 2:10 ` Li Zefan
2012-01-21 0:08 ` Tejun Heo
2012-01-21 0:08 ` Tejun Heo
2012-01-21 0:08 ` Tejun Heo
[not found] ` <20120121000842.GB2908-RcKxWJ4Cfj1J2suj2OqeGauc2jM2gXBXkQQo+JxHRPFibQn6LdNjmg@public.gmane.org>
2012-01-21 2:57 ` Mandeep Singh Baines
2012-01-21 2:57 ` Mandeep Singh Baines
[not found] ` <20120121025712.GB4656-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2012-01-21 5:52 ` Tejun Heo
2012-01-21 5:52 ` Tejun Heo
2012-01-21 5:52 ` Tejun Heo
2012-01-05 2:08 ` [PATCH 1/3] cgroup: simplify double-check locking in cgroup_attach_proc Li Zefan
2012-01-05 2:08 ` Li Zefan
2012-01-05 2:08 ` Li Zefan
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