linux-kernel - Re: [Bug #14141] order 2 page allocation failures (generic)

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: <20091019140145.GA4222@bizet.domek.prywatny>
Date:	Mon, 19 Oct 2009 16:01:45 +0200
From:	Karol Lewandowski <karol.k.lewandowski@...il.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Tobi Oetiker <tobi@...iker.ch>, Frans Pop <elendil@...net.nl>,
	Mel Gorman <mel@....ul.ie>,
	David Rientjes <rientjes@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Karol Lewandowski <karol.k.lewandowski@...il.com>,
	Mohamed Abbas <mohamed.abbas@...el.com>,
	"John W. Linville" <linville@...driver.com>, linux-mm@...ck.org,
	jens.axboe@...cle.com
Subject: Re: [Bug #14141] order 2 page allocation failures (generic)

On Mon, Oct 19, 2009 at 12:54:11PM +0300, Pekka Enberg wrote:
> On Mon, 2009-10-19 at 11:49 +0200, Tobi Oetiker wrote:
> > I have updated a fileserver to 2.6.31 today and I see page
> > allocation failures from several parts of the system ... mostly nfs though ... (it is a nfs server).
> > So I guess the problem must be quite generic:
> 
> Yup, it almost certainly is. Does this patch help?
> 
> http://lkml.org/lkml/2009/10/16/89

This patch seems to help in some cases.  Before applying this patch I
was able to trigger alloc failures on different machine by booting
kernel with "mem=256MB" and doing:

  $ gitk on-full-tree &
  # rmmod e100
  ... wait for few MBs in swap
  # modprobe e100; ifup --force ethX

So here this patch helped -- with it, I was unable to trigger page
allocation failures (testing was short, tough).  However, as I said
here[1], I applied both of Mel's patches (including this one) and that
didn't help my orginal issue (failures after suspend).

[1] http://lkml.org/lkml/2009/10/17/109

Thanks.
--
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/