From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
To: "Paul Menage" <menage@google.com>
Cc: sekharan@us.ibm.com, ckrm-tech@lists.sourceforge.net,
linux-kernel@vger.kernel.org, xemul@sw.ru, dev@sw.ru,
containers@lists.osdl.org, pj@sgi.com, ebiederm@xmission.com,
mbligh@google.com, winget@google.com, rohitseth@google.com,
serue@us.ibm.com, devel@openvz.org
Subject: Re: [ckrm-tech] [PATCH 1/7] containers (V7): Generic container system abstracted from cpusets code
Date: Tue, 13 Feb 2007 13:46:25 +0530 [thread overview]
Message-ID: <20070213081625.GA4252@in.ibm.com> (raw)
In-Reply-To: <20070213054857.GD22982@in.ibm.com>
On Tue, Feb 13, 2007 at 11:18:57AM +0530, Srivatsa Vaddagiri wrote:
> Which make me wonder why we need task_lock() at all ..I can understand
> the need for a lock like that if we are reading/updating multiple words
> in task_struct under the lock. In this case, it is used to read/write
> just one pointer, isnt it? I think it can be eliminated all-together
> with the use of RCU.
I see that cpuset.c uses task_lock to read/write multiple words
(cpuset_update_task_memory_state) ..So yes it is necessary in attach_task() ..
--
Regards,
vatsa
next prev parent reply other threads:[~2007-02-13 8:16 UTC|newest]
Thread overview: 132+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-02-12 8:15 [PATCH 0/7] containers (V7): Generic Process Containers menage
2007-02-12 8:15 ` [PATCH 1/7] containers (V7): Generic container system abstracted from cpusets code menage
2007-02-12 12:33 ` Srivatsa Vaddagiri
2007-02-12 19:26 ` Paul Menage
2007-02-12 19:46 ` Paul Menage
2007-02-13 5:48 ` Srivatsa Vaddagiri
2007-02-13 8:16 ` Srivatsa Vaddagiri [this message]
2007-03-07 12:21 ` Srivatsa Vaddagiri
2007-03-07 14:06 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-07 20:50 ` Paul Menage
2007-03-08 10:38 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-08 10:40 ` Paul Menage
2007-03-11 19:38 ` Paul Jackson
2007-03-12 14:19 ` Srivatsa Vaddagiri
2007-03-22 9:56 ` Srivatsa Vaddagiri
2007-03-22 10:20 ` Srivatsa Vaddagiri
2007-03-24 15:05 ` Srivatsa Vaddagiri
2007-03-24 19:25 ` Paul Jackson
2007-03-25 0:45 ` Srivatsa Vaddagiri
2007-03-25 1:41 ` Paul Jackson
2007-03-25 2:28 ` Srivatsa Vaddagiri
2007-03-25 4:16 ` Srivatsa Vaddagiri
2007-03-25 5:43 ` Paul Jackson
2007-03-25 8:21 ` Srivatsa Vaddagiri
2007-03-25 4:45 ` Paul Jackson
2007-03-25 5:05 ` Srivatsa Vaddagiri
2007-03-25 4:59 ` Paul Jackson
2007-02-12 8:15 ` [PATCH 2/7] containers (V7): Cpusets hooked into containers menage
2007-02-15 20:35 ` Serge E. Hallyn
2007-02-15 20:49 ` Paul Menage
2007-03-07 14:34 ` Srivatsa Vaddagiri
2007-03-07 16:01 ` Paul Menage
2007-03-07 16:31 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-07 16:31 ` Paul Menage
2007-03-07 14:52 ` Srivatsa Vaddagiri
2007-03-07 16:12 ` Paul Menage
2007-02-12 8:15 ` [PATCH 4/7] containers (V7): Simple CPU accounting container subsystem menage
2007-02-12 8:15 ` [PATCH 5/7] containers (V7): Resource Groups over generic containers menage
2007-02-12 8:15 ` [PATCH 6/7] containers (V7): BeanCounters over generic process containers menage
2007-02-12 15:34 ` Srivatsa Vaddagiri
2007-02-12 18:49 ` Paul Menage
2007-02-13 8:52 ` Pavel Emelianov
2007-02-13 9:03 ` Paul Menage
2007-02-13 9:18 ` Pavel Emelianov
2007-02-13 9:37 ` Paul Menage
2007-02-13 9:49 ` Pavel Emelianov
2007-02-12 8:15 ` [PATCH 7/7] containers (V7): Container interface to nsproxy subsystem menage
2007-03-24 5:05 ` [ckrm-tech] " Srivatsa Vaddagiri
2007-03-24 16:23 ` Srivatsa Vaddagiri
2007-03-26 21:57 ` Serge E. Hallyn
2007-03-28 14:55 ` Srivatsa Vaddagiri
2007-03-28 15:26 ` Serge E. Hallyn
2007-03-26 21:55 ` Serge E. Hallyn
2007-03-31 2:47 ` Srivatsa Vaddagiri
2007-04-02 14:09 ` Serge E. Hallyn
2007-04-02 14:27 ` Srivatsa Vaddagiri
2007-04-02 18:02 ` Eric W. Biederman
2007-04-03 14:16 ` Srivatsa Vaddagiri
2007-04-03 15:32 ` Serge E. Hallyn
2007-04-03 15:45 ` Paul Menage
2007-04-03 15:54 ` Serge E. Hallyn
2007-04-03 16:16 ` Srivatsa Vaddagiri
2007-04-03 16:26 ` Kirill Korotaev
2007-04-03 16:46 ` Srivatsa Vaddagiri
2007-04-03 16:52 ` Paul Menage
2007-04-03 17:11 ` Srivatsa Vaddagiri
2007-04-03 17:10 ` Paul Menage
2007-04-03 17:30 ` Srivatsa Vaddagiri
2007-04-03 17:30 ` Paul Menage
2007-04-03 17:51 ` Srivatsa Vaddagiri
2007-04-03 17:49 ` Paul Menage
2007-04-04 3:07 ` Srivatsa Vaddagiri
2007-04-04 3:44 ` Paul Jackson
2007-04-04 4:04 ` Paul Menage
2007-04-04 5:15 ` Srivatsa Vaddagiri
2007-04-04 7:00 ` Paul Menage
2007-04-04 17:26 ` Srivatsa Vaddagiri
2007-04-04 17:42 ` Srivatsa Vaddagiri
2007-04-04 18:57 ` Paul Menage
2007-04-04 23:02 ` Eric W. Biederman
2007-04-05 1:35 ` Paul Menage
2007-04-05 1:37 ` Paul Menage
2007-04-05 16:57 ` Srivatsa Vaddagiri
2007-04-05 17:14 ` Srivatsa Vaddagiri
2007-04-06 21:54 ` Paul Menage
2007-04-05 2:57 ` Paul Menage
2007-04-05 6:39 ` Srivatsa Vaddagiri
2007-04-05 6:46 ` Srivatsa Vaddagiri
2007-04-05 6:48 ` Paul Menage
2007-04-05 8:49 ` Srivatsa Vaddagiri
2007-04-05 9:29 ` Paul Menage
2007-04-05 12:43 ` Srivatsa Vaddagiri
2007-04-05 14:13 ` Srivatsa Vaddagiri
2007-04-05 14:13 ` Paul Menage
2007-04-05 14:46 ` Srivatsa Vaddagiri
2007-04-03 17:34 ` Srivatsa Vaddagiri
2007-04-03 17:29 ` Paul Menage
2007-04-03 16:10 ` Srivatsa Vaddagiri
2007-04-03 15:41 ` Serge E. Hallyn
2007-02-12 9:18 ` [PATCH 0/7] containers (V7): Generic Process Containers Paul Jackson
2007-02-12 9:32 ` Paul Menage
2007-02-12 9:52 ` Paul Jackson
2007-02-12 22:38 ` Sam Vilain
2007-02-12 22:47 ` Serge E. Hallyn
2007-02-12 23:18 ` Paul Menage
2007-02-12 23:15 ` Paul Menage
2007-02-13 0:30 ` Sam Vilain
2007-02-13 0:42 ` [ckrm-tech] " Paul Menage
2007-02-13 1:13 ` Sam Vilain
2007-02-13 1:47 ` Paul Menage
2007-02-20 17:34 ` Eric W. Biederman
2007-02-20 17:55 ` Paul Menage
2007-02-20 19:29 ` Eric W. Biederman
2007-02-20 22:47 ` Paul Menage
2007-02-20 23:08 ` Sam Vilain
2007-02-20 23:36 ` Paul Menage
2007-02-20 23:32 ` Serge E. Hallyn
2007-02-20 21:58 ` Sam Vilain
2007-02-20 22:19 ` Paul Menage
2007-02-20 22:58 ` Sam Vilain
2007-02-20 23:28 ` Paul Menage
2007-02-20 23:37 ` Serge E. Hallyn
[not found] ` <20070212085104.485337000@menage.corp.google.com>
2007-02-12 15:27 ` [PATCH 3/7] containers (V7): Add generic multi-subsystem API to containers Srivatsa Vaddagiri
2007-02-12 18:40 ` Paul Menage
2007-02-13 13:19 ` Srivatsa Vaddagiri
2007-02-15 1:17 ` Paul Menage
2007-02-12 15:39 ` Serge E. Hallyn
2007-02-12 15:56 ` Cedric Le Goater
2007-02-12 18:31 ` Paul Menage
2007-02-14 8:49 ` Balbir Singh
2007-03-08 17:52 ` Srivatsa Vaddagiri
2007-03-24 12:51 ` [ckrm-tech] " Srivatsa Vaddagiri
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