From: Nick Piggin <npiggin@suse.de>
To: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
GOTO <y-goto@jp.fujitsu.com>
Subject: Re: Warning on memory offline (and possible in usual migration?)
Date: Fri, 2 May 2008 02:44:45 +0200 [thread overview]
Message-ID: <20080502004445.GB30768@wotan.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0805011224150.8738@schroedinger.engr.sgi.com>
On Thu, May 01, 2008 at 12:25:54PM -0700, Christoph Lameter wrote:
> On Thu, 1 May 2008, Nick Piggin wrote:
>
> > Yes if PageUptodate and the page is locked, then I don't believe
> > any read IO should happen.
>
> Ok so page migration should check for that and not migrate a page that is
> !Uptodate?
Buffer migration seems to work OK now, why do you need to add the
restriction?
> > But you definitely do seem to be migrating !PageUptodate pages. In
> > that case I think it works because of buffer_migrate_page which takes
> > the buffer locks and holds off read IO to buffers too.
>
> Comes about because memory offlining gets to pages that are not mapped
> into a process address space.
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next prev parent reply other threads:[~2008-05-02 0:44 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-14 5:58 KAMEZAWA Hiroyuki
2008-04-14 17:46 ` Christoph Lameter
2008-04-15 10:13 ` KAMEZAWA Hiroyuki
2008-04-15 19:31 ` Christoph Lameter
2008-04-16 0:23 ` KAMEZAWA Hiroyuki
2008-04-16 2:23 ` KAMEZAWA Hiroyuki
2008-04-16 3:10 ` KAMEZAWA Hiroyuki
2008-04-16 5:22 ` KAMEZAWA Hiroyuki
2008-04-16 18:04 ` Christoph Lameter
2008-04-16 11:00 ` KAMEZAWA Hiroyuki
2008-04-16 18:36 ` Andrew Morton
2008-04-17 0:19 ` KAMEZAWA Hiroyuki
2008-04-17 6:38 ` Warning on memory offline (possible in migration ?) KAMEZAWA Hiroyuki
2008-04-17 6:43 ` Andrew Morton
2008-04-17 6:55 ` KAMEZAWA Hiroyuki
2008-04-22 4:41 ` Warning on memory offline (and possible in usual migration?) Nick Piggin
2008-04-22 4:52 ` Nick Piggin
2008-04-22 7:56 ` KAMEZAWA Hiroyuki
2008-04-22 9:43 ` Nick Piggin
2008-04-22 9:57 ` KAMEZAWA Hiroyuki
2008-04-22 19:16 ` Christoph Lameter
2008-04-23 0:48 ` Nick Piggin
2008-04-23 1:37 ` KAMEZAWA Hiroyuki
2008-04-23 2:41 ` KAMEZAWA Hiroyuki
2008-04-23 2:53 ` Nick Piggin
2008-04-23 3:44 ` KAMEZAWA Hiroyuki
2008-04-23 15:28 ` Nick Piggin
2008-04-24 1:34 ` KAMEZAWA Hiroyuki
2008-04-23 17:50 ` Christoph Lameter
2008-04-24 1:36 ` KAMEZAWA Hiroyuki
2008-04-24 19:11 ` Christoph Lameter
2008-04-25 0:11 ` KAMEZAWA Hiroyuki
2008-04-23 17:47 ` Christoph Lameter
2008-04-24 2:13 ` Nick Piggin
2008-04-29 7:20 ` KAMEZAWA Hiroyuki
2008-04-30 6:56 ` Nick Piggin
2008-04-30 7:04 ` KAMEZAWA Hiroyuki
2008-04-30 7:12 ` Andrew Morton
2008-04-30 7:22 ` KAMEZAWA Hiroyuki
2008-04-30 7:26 ` Nick Piggin
2008-04-30 17:59 ` Christoph Lameter
2008-04-30 18:01 ` Christoph Lameter
2008-05-01 1:44 ` Nick Piggin
2008-05-01 19:25 ` Christoph Lameter
2008-05-02 0:44 ` Nick Piggin [this message]
2008-05-02 1:07 ` Christoph Lameter
2008-05-02 1:23 ` Nick Piggin
2008-05-02 1:37 ` Christoph Lameter
2008-05-02 21:16 ` Christoph Lameter
2008-05-05 4:27 ` Nick Piggin
2008-05-05 17:28 ` Christoph Lameter
2008-05-06 8:52 ` Nick Piggin
2008-05-06 17:49 ` Christoph Lameter
2008-04-30 23:29 ` kamezawa.hiroyu
2008-05-01 0:34 ` Badari Pulavarty
2008-05-01 8:36 ` kamezawa.hiroyu
2008-04-22 4:50 ` Nick Piggin
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