linux-kernel - Re: [RFC] memory hotremove patch take 2 [10/10] (retry swap-in page)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 9 May 2007 12:26:05 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Yasunori Goto <y-goto@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org, akpm@...l.org,
	clameter@....com, mel@....ul.ie
Subject: Re: [RFC] memory hotremove patch take 2 [10/10] (retry swap-in
 page)

On Wed, 09 May 2007 12:12:32 +0900
Yasunori Goto <y-goto@...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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/