linux-kernel - Re: [Bug #13319] Page allocation failures with b43 and p54usb

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Date:	Thu, 11 Jun 2009 20:41:36 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Pekka Enberg <penberg@...helsinki.fi>
Cc:	Christoph Lameter <cl@...ux-foundation.org>,
	Larry Finger <Larry.Finger@...inger.net>,
	David Rientjes <rientjes@...gle.com>,
	Mel Gorman <mel@....ul.ie>, Rik van Riel <riel@...hat.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	npiggin@...e.de, yanmin.zhang@...ux.intel.com
Subject: Re: [Bug #13319] Page allocation failures with b43 and p54usb

On Thu, 2009-06-11 at 18:09 +0300, Pekka Enberg wrote:
> On Wed, 10 Jun 2009, Pekka Enberg wrote:
> > > Aha, SLUB thinks the minimum order for 4096 is 1. I guess you have
> > > CONFIG_SLUB_DEBUG enabled? If yes, something like to following should
> > > help. Christoph, are you okay with this patch?
> 
> On Thu, 2009-06-11 at 10:41 -0400, Christoph Lameter wrote:
> > He likely has CONFIG_SLUB_DEBUG_ON set which enables debugging and thus
> > needs more than the payload for metadata.
> 
> Yup. I suspect a lot of people who are doing _testing_ enable that. If
> you're unhappy with my patch (the get_order one which shouldn't affect
> that many caches anyway), any suggestions how to fix this up? It seems
> that the wireless stack at least does quite a few kmalloc(4096)
> allocations.

I think networking rounds up allocations, but it's not wireless per se.

johannes

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