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 03:23:50 +0200 [thread overview]
Message-ID: <20080502012350.GF30768@wotan.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.0805011805150.13527@schroedinger.engr.sgi.com>
On Thu, May 01, 2008 at 06:07:43PM -0700, Christoph Lameter wrote:
> On Fri, 2 May 2008, Nick Piggin wrote:
>
> > 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?
>
> Because we have to protect against read I/O. We cannot migrate
> a page that is under I/O and free the memory that is being written to by a
> device.
The buffer migration path protects against read IO on buffers.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2008-05-02 1:23 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-14 5:58 Warning on memory offline (and possible in usual migration?) 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 6:38 ` KAMEZAWA Hiroyuki
2008-04-17 6:43 ` Andrew Morton
2008-04-17 6:43 ` Andrew Morton
2008-04-17 6:55 ` KAMEZAWA Hiroyuki
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
2008-04-30 23:29 ` kamezawa.hiroyu
2008-05-01 0:34 ` Badari Pulavarty
2008-05-01 8:36 ` kamezawa.hiroyu
2008-05-01 1:44 ` Nick Piggin
2008-05-01 19:25 ` Christoph Lameter
2008-05-02 0:44 ` Nick Piggin
2008-05-02 1:07 ` Christoph Lameter
2008-05-02 1:23 ` Nick Piggin [this message]
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
2008-04-22 4:50 ` Nick Piggin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080502012350.GF30768@wotan.suse.de \
--to=npiggin@suse.de \
--cc=akpm@linux-foundation.org \
--cc=clameter@sgi.com \
--cc=kamezawa.hiroyu@jp.fujitsu.com \
--cc=linux-mm@kvack.org \
--cc=y-goto@jp.fujitsu.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.