From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, akpm@osdl.org,
clameter@sgi.com, mel@csn.ul.ie
Subject: Re: [RFC] memory hotremove patch take 2 [10/10] (retry swap-in page)
Date: Wed, 9 May 2007 12:26:05 +0900 [thread overview]
Message-ID: <20070509122605.e178e516.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20070509120947.B91A.Y-GOTO@jp.fujitsu.com>
On Wed, 09 May 2007 12:12:32 +0900
Yasunori Goto <y-goto@jp.fujitsu.com> wrote:
> There is a race condition between swap-in and unmap_and_move().
> When swap-in occur, page_mapped might be not set yet.
> So, unmap_and_move() gives up at once, and tries later.
>
>
Note: this will not happen in sys_migratepage(), it holds mm->sem and
gathers migration target page from page table.
-Kame
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prev parent reply other threads:[~2007-05-09 3:26 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-09 2:59 [RFC] memory hotremove patch take 2 [00/10] Yasunori Goto
2007-05-09 3:10 ` [RFC] memory hotremove patch take 2 [01/10] (counter of removable page) Yasunori Goto
2007-05-10 12:46 ` Mel Gorman
2007-05-10 13:44 ` Andi Kleen
2007-05-11 1:08 ` KAMEZAWA Hiroyuki
2007-05-10 18:00 ` Christoph Lameter
2007-05-11 1:09 ` KAMEZAWA Hiroyuki
2007-05-09 3:10 ` [RFC] memory hotremove patch take 2 [02/10] (make page unused) Yasunori Goto
2007-05-10 15:34 ` Mel Gorman
2007-05-11 0:47 ` KAMEZAWA Hiroyuki
2007-05-10 18:04 ` Christoph Lameter
2007-05-11 0:49 ` KAMEZAWA Hiroyuki
2007-05-09 3:10 ` [RFC] memory hotremove patch take 2 [03/10] (drain all pages) Yasunori Goto
2007-05-10 15:35 ` Mel Gorman
2007-05-11 0:53 ` KAMEZAWA Hiroyuki
2007-05-10 18:07 ` Christoph Lameter
2007-05-11 0:54 ` KAMEZAWA Hiroyuki
2007-05-09 3:10 ` [RFC] memory hotremove patch take 2 [04/10] (isolate all free pages) Yasunori Goto
2007-05-10 16:42 ` Mel Gorman
2007-05-11 0:58 ` KAMEZAWA Hiroyuki
2007-05-10 18:07 ` Christoph Lameter
2007-05-09 3:11 ` [RFC] memory hotremove patch take 2 [05/10] (make basic remove code) Yasunori Goto
2007-05-10 18:09 ` Christoph Lameter
2007-05-11 1:05 ` KAMEZAWA Hiroyuki
2007-05-09 3:11 ` [RFC] memory hotremove patch take 2 [06/10] (ia64's remove_memory code) Yasunori Goto
2007-05-09 3:11 ` [RFC] memory hotremove patch take 2 [07/10] (delay freeing anon_vma) Yasunori Goto
2007-05-09 3:12 ` [RFC] memory hotremove patch take 2 [08/10] (memap init alignment) Yasunori Goto
2007-05-09 3:12 ` [RFC] memory hotremove patch take 2 [09/10] (direct isolation for remove) Yasunori Goto
2007-05-09 3:12 ` [RFC] memory hotremove patch take 2 [10/10] (retry swap-in page) Yasunori Goto
2007-05-09 3:26 ` KAMEZAWA Hiroyuki [this message]
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