linux-kernel - Re: [PATCH] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous

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]

Message-ID: <20110604072512.GB4114@barrios-laptop>
Date:	Sat, 4 Jun 2011 16:25:12 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Andrea Arcangeli <aarcange@...hat.com>
Cc:	Mel Gorman <mgorman@...e.de>, akpm@...ux-foundation.org,
	Ury Stankevich <urykhy@...il.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, stable@...nel.org
Subject: Re: [PATCH] mm: compaction: Abort compaction if too many pages are
 isolated and caller is asynchronous

On Fri, Jun 03, 2011 at 05:45:54PM +0200, Andrea Arcangeli wrote:
> On Fri, Jun 03, 2011 at 03:49:41PM +0100, Mel Gorman wrote:
> > Right idea of the wrong zone being accounted for but wrong place. I
> > think the following patch should fix the problem;
> 
> Looks good thanks.
> 
> I also found this bug during my debugging that made NR_SHMEM underflow.
> 
> ===
> Subject: migrate: don't account swapcache as shmem
> 
> From: Andrea Arcangeli <aarcange@...hat.com>
> 
> swapcache will reach the below code path in migrate_page_move_mapping,
> and swapcache is accounted as NR_FILE_PAGES but it's not accounted as
> NR_SHMEM.
> 
> Signed-off-by: Andrea Arcangeli <aarcange@...hat.com>
Reviewed-by: Minchan Kim <minchan.kim@...il.com>

Nice catch!
-- 
Kind regards
Minchan Kim
--
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/