From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: linux-mm@kvack.org, mel@csn.ul.ie, y-goto@jp.fujitsu.com,
hugh@veritas.com
Subject: Re: [RFC] memory unplug v5 [1/6] migration by kernel
Date: Fri, 15 Jun 2007 01:15:36 +0900 [thread overview]
Message-ID: <20070615011536.beaa79c1.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0706140909030.29612@schroedinger.engr.sgi.com>
On Thu, 14 Jun 2007 09:12:37 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:
> > An unmapped swapcache page, which is just added to LRU, may be accessed via migrate_page().
> > But page->mapping is NULL yet.
>
> Yes then lets add a check for page->mapping == NULL there.
>
> if (!page->mapping)
> goto unlock;
>
> That will retry the migration on the next pass. Add some concise comment
> explaining the situation. This is general bug in page migration.
>
Ok, will do. thank you for your advice.
-Kame
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next prev parent reply other threads:[~2007-06-14 16:15 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-14 6:56 [RFC] memory unplug v5 [0/6] intro KAMEZAWA Hiroyuki
2007-06-14 6:59 ` [RFC] memory unplug v5 [1/6] migration by kernel KAMEZAWA Hiroyuki
2007-06-14 7:01 ` Christoph Lameter
2007-06-14 7:11 ` KAMEZAWA Hiroyuki
2007-06-14 7:22 ` Christoph Lameter
2007-06-14 7:41 ` KAMEZAWA Hiroyuki
2007-06-14 7:47 ` Christoph Lameter
2007-06-14 8:29 ` KAMEZAWA Hiroyuki
2007-06-14 14:19 ` Christoph Lameter
2007-06-14 16:02 ` KAMEZAWA Hiroyuki
2007-06-14 16:12 ` Christoph Lameter
2007-06-14 16:15 ` KAMEZAWA Hiroyuki [this message]
2007-06-14 18:04 ` Mel Gorman
2007-06-14 22:31 ` KAMEZAWA Hiroyuki
2007-06-15 9:43 ` KAMEZAWA Hiroyuki
2007-06-15 9:53 ` KAMEZAWA Hiroyuki
2007-06-15 14:41 ` Christoph Lameter
2007-06-15 15:36 ` KAMEZAWA Hiroyuki
2007-06-14 7:00 ` [RFC] memory unplug v5 [2/6] isolate lru page race fix KAMEZAWA Hiroyuki
2007-06-14 7:01 ` [RFC] memory unplug v5 [3/6] walk memory resources assist function KAMEZAWA Hiroyuki
2007-06-15 6:05 ` David Rientjes
2007-06-15 6:11 ` KAMEZAWA Hiroyuki
2007-06-14 7:03 ` [RFC] memory unplug v5 [4/6] page isolation KAMEZAWA Hiroyuki
2007-06-15 15:46 ` Dave Hansen
2007-06-15 16:59 ` KAMEZAWA Hiroyuki
2007-06-14 7:04 ` [RFC] memory unplug v5 [5/6] page unplug KAMEZAWA Hiroyuki
2007-06-15 6:04 ` David Rientjes
2007-06-15 6:12 ` KAMEZAWA Hiroyuki
2007-06-15 14:35 ` Christoph Lameter
2007-06-15 14:40 ` Andy Whitcroft
2007-06-15 15:52 ` Dave Hansen
2007-06-15 17:03 ` KAMEZAWA Hiroyuki
2007-06-15 21:09 ` Dave Hansen
2007-06-14 7:06 ` [RFC] memory unplug v5 [6/6] ia64 interface KAMEZAWA Hiroyuki
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