linux-kernel - Re: [RFC PATCH 0/8] Reduce filesystem writeback from page reclaim v2

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20110729095005.GH1843@barrios-desktop>
Date:	Fri, 29 Jul 2011 18:50:05 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Mel Gorman <mgorman@...e.de>, Andrew Lutomirski <luto@....edu>
Cc:	Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
	XFS <xfs@....sgi.com>, Dave Chinner <david@...morbit.com>,
	Christoph Hellwig <hch@...radead.org>,
	Johannes Weiner <jweiner@...hat.com>,
	Wu Fengguang <fengguang.wu@...el.com>, Jan Kara <jack@...e.cz>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [RFC PATCH 0/8] Reduce filesystem writeback from page reclaim v2

Sorry for missing Ccing.

On Fri, Jul 29, 2011 at 06:48:16PM +0900, Minchan Kim wrote:
> On Thu, Jul 28, 2011 at 12:38:52PM +0100, Mel Gorman wrote:
> > On Thu, Jul 28, 2011 at 01:18:21AM +0900, Minchan Kim wrote:
> > > On Thu, Jul 21, 2011 at 05:28:42PM +0100, Mel Gorman wrote:
> > > > Note how preventing kswapd reclaiming dirty pages pushes up its CPU
> 
> <snip>
> 
> > > > usage as it scans more pages but it does not get excessive due to
> > > > the throttling.
> > > 
> > > Good to hear.
> > > The concern of this patchset was early OOM kill with too many scanning.
> > > I can throw such concern out from now on.
> > > 
> > 
> > At least, I haven't been able to trigger a premature OOM.
> 
> AFAIR, Andrew had a premature OOM problem[1] but I couldn't track down at that time.
> I think this patch series might solve his problem. Although it doesn't, it should not accelerate
> his problem, at least.
> 
> Andrew, Could you test this patchset?
> 
> [1] https://lkml.org/lkml/2011/5/25/415
> -- 
> Kind regards,
> Minchan Kim

-- 
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/