From: Paul Jackson <pj@sgi.com>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: kamezawa.hiroyu@jp.fujitsu.com, Simon.Derr@bull.net,
akpm@osdl.org, kravetz@us.ibm.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, magnus.damm@gmail.com,
marcelo.tosatti@cyclades.com
Subject: Re: [PATCH 4/4] Swap migration V3: sys_migrate_pages interface
Date: Fri, 21 Oct 2005 11:17:06 -0700 [thread overview]
Message-ID: <20051021111706.14ba1569.pj@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.62.0510211005090.23359@schroedinger.engr.sgi.com>
Christoph wrote:
> Therefore if mems_allowed is accessed from outside of the
> task then it may not be up to date, right?
Yup - exactly.
The up to date allowed memory container for a task is in its cpuset,
which does have the locking mechanisms needed for safe access from
other tasks.
The task mems_allowed is just a private cache of the mems_allowed of
its cpuset, used for quick access from within the task context by the
page allocation code.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.925.600.0401
WARNING: multiple messages have this Message-ID (diff)
From: Paul Jackson <pj@sgi.com>
To: Christoph Lameter <clameter@engr.sgi.com>
Cc: kamezawa.hiroyu@jp.fujitsu.com, Simon.Derr@bull.net,
akpm@osdl.org, kravetz@us.ibm.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, magnus.damm@gmail.com,
marcelo.tosatti@cyclades.com
Subject: Re: [PATCH 4/4] Swap migration V3: sys_migrate_pages interface
Date: Fri, 21 Oct 2005 11:17:06 -0700 [thread overview]
Message-ID: <20051021111706.14ba1569.pj@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.62.0510211005090.23359@schroedinger.engr.sgi.com>
Christoph wrote:
> Therefore if mems_allowed is accessed from outside of the
> task then it may not be up to date, right?
Yup - exactly.
The up to date allowed memory container for a task is in its cpuset,
which does have the locking mechanisms needed for safe access from
other tasks.
The task mems_allowed is just a private cache of the mems_allowed of
its cpuset, used for quick access from within the task context by the
page allocation code.
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <pj@sgi.com> 1.925.600.0401
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next prev parent reply other threads:[~2005-10-21 18:17 UTC|newest]
Thread overview: 109+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-20 22:59 [PATCH 0/4] Swap migration V3: Overview Christoph Lameter
2005-10-20 22:59 ` Christoph Lameter
2005-10-20 22:59 ` [PATCH 1/4] Swap migration V3: LRU operations Christoph Lameter
2005-10-20 22:59 ` Christoph Lameter
2005-10-21 6:06 ` Dave Hansen
2005-10-21 6:06 ` Dave Hansen
2005-10-21 6:27 ` Magnus Damm
2005-10-21 6:27 ` Magnus Damm
2005-10-21 6:56 ` Dave Hansen
2005-10-21 6:56 ` Dave Hansen
2005-10-21 7:25 ` Magnus Damm
2005-10-21 7:25 ` Magnus Damm
2005-10-21 15:42 ` Christoph Lameter
2005-10-21 15:42 ` Christoph Lameter
2005-10-21 11:49 ` Nikita Danilov
2005-10-21 11:49 ` Nikita Danilov
2005-10-20 22:59 ` [PATCH 2/4] Swap migration V3: Page Eviction Christoph Lameter
2005-10-20 22:59 ` Christoph Lameter
2005-10-22 1:06 ` Marcelo Tosatti
2005-10-22 1:06 ` Marcelo Tosatti
2005-10-20 22:59 ` [PATCH 3/4] Swap migration V3: MPOL_MF_MOVE interface Christoph Lameter
2005-10-20 22:59 ` Christoph Lameter
2005-10-20 22:59 ` [PATCH 4/4] Swap migration V3: sys_migrate_pages interface Christoph Lameter
2005-10-20 22:59 ` Christoph Lameter
2005-10-21 2:55 ` KAMEZAWA Hiroyuki
2005-10-21 2:55 ` KAMEZAWA Hiroyuki
2005-10-21 7:07 ` Simon Derr
2005-10-21 7:07 ` Simon Derr
2005-10-21 7:20 ` KAMEZAWA Hiroyuki
2005-10-21 7:20 ` KAMEZAWA Hiroyuki
2005-10-21 7:39 ` Simon Derr
2005-10-21 7:39 ` Simon Derr
2005-10-21 7:46 ` KAMEZAWA Hiroyuki
2005-10-21 7:46 ` KAMEZAWA Hiroyuki
2005-10-21 15:22 ` Paul Jackson
2005-10-21 15:22 ` Paul Jackson
2005-10-21 15:15 ` Paul Jackson
2005-10-21 15:15 ` Paul Jackson
2005-10-21 15:21 ` Kamezawa Hiroyuki
2005-10-21 15:21 ` Kamezawa Hiroyuki
2005-10-21 18:10 ` Paul Jackson
2005-10-21 18:10 ` Paul Jackson
2005-10-21 18:26 ` Christoph Lameter
2005-10-21 18:26 ` Christoph Lameter
2005-10-21 18:57 ` Paul Jackson
2005-10-21 18:57 ` Paul Jackson
2005-10-21 15:47 ` Christoph Lameter
2005-10-21 15:47 ` Christoph Lameter
2005-10-21 16:18 ` Ray Bryant
2005-10-21 16:18 ` Ray Bryant
2005-10-21 16:33 ` Christoph Lameter
2005-10-21 16:33 ` Christoph Lameter
2005-10-21 15:18 ` Paul Jackson
2005-10-21 15:18 ` Paul Jackson
2005-10-21 16:27 ` Christoph Lameter
2005-10-21 16:27 ` Christoph Lameter
2005-10-21 16:59 ` Kamezawa Hiroyuki
2005-10-21 16:59 ` Kamezawa Hiroyuki
2005-10-21 17:03 ` Paul Jackson
2005-10-21 17:03 ` Paul Jackson
2005-10-21 17:06 ` Christoph Lameter
2005-10-21 17:06 ` Christoph Lameter
2005-10-21 18:17 ` Paul Jackson [this message]
2005-10-21 18:17 ` Paul Jackson
2005-10-20 23:06 ` [PATCH 0/4] Swap migration V3: Overview Andrew Morton
2005-10-20 23:06 ` Andrew Morton
2005-10-20 23:46 ` mike kravetz
2005-10-20 23:46 ` mike kravetz
2005-10-21 3:22 ` KAMEZAWA Hiroyuki
2005-10-21 3:22 ` KAMEZAWA Hiroyuki
2005-10-21 3:32 ` mike kravetz
2005-10-21 3:32 ` mike kravetz
2005-10-21 3:56 ` KAMEZAWA Hiroyuki
2005-10-21 3:56 ` KAMEZAWA Hiroyuki
2005-10-21 4:22 ` mike kravetz
2005-10-21 4:22 ` mike kravetz
2005-10-21 5:13 ` KAMEZAWA Hiroyuki
2005-10-21 5:13 ` KAMEZAWA Hiroyuki
2005-10-21 15:28 ` Paul Jackson
2005-10-21 15:28 ` Paul Jackson
2005-10-21 16:00 ` mike kravetz
2005-10-21 16:00 ` mike kravetz
2005-10-21 5:59 ` KAMEZAWA Hiroyuki
2005-10-21 5:59 ` KAMEZAWA Hiroyuki
2005-10-22 1:16 ` Marcelo Tosatti
2005-10-22 1:16 ` Marcelo Tosatti
2005-10-21 15:54 ` Christoph Lameter
2005-10-21 15:54 ` Christoph Lameter
2005-10-21 1:57 ` Magnus Damm
2005-10-21 1:57 ` Magnus Damm
2005-10-22 0:50 ` Marcelo Tosatti
2005-10-22 0:50 ` Marcelo Tosatti
2005-10-23 12:50 ` Magnus Damm
2005-10-23 12:50 ` Magnus Damm
2005-10-24 7:44 ` Marcelo Tosatti
2005-10-24 7:44 ` Marcelo Tosatti
2005-10-25 11:37 ` Magnus Damm
2005-10-25 14:37 ` Marcelo Tosatti
2005-10-25 14:37 ` Marcelo Tosatti
2005-10-26 7:04 ` Magnus Damm
2005-10-26 7:04 ` Magnus Damm
2005-10-27 15:01 ` Marcelo Tosatti
2005-10-27 15:01 ` Marcelo Tosatti
2005-10-27 20:43 ` Andrew Morton
2005-10-27 20:43 ` Andrew Morton
2005-10-27 21:35 ` Marcelo Tosatti
2005-10-27 21:35 ` Marcelo Tosatti
2005-10-28 3:07 ` Andrew Morton
2005-10-28 3:07 ` Andrew Morton
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