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

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Message-Id: <20090516163610.8a012268.akpm@linux-foundation.org>
Date:	Sat, 16 May 2009 16:36:10 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	"Johannes Berg" <johannes@...solutions.net>,
	"Larry Finger" <Larry.Finger@...inger.net>,
	linux-wireless@...r.kernel.org
Subject: Re: [Bug #13319] Page allocation failures with b43 and p54usb

On Sat, 16 May 2009 21:20:45 +0200 (CEST) "Rafael J. Wysocki" <rjw@...k.pl> wrote:

> This message has been generated automatically as a part of a report
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions
> from 2.6.29.  Please verify if it still should be listed and let me know
> (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=13319
> Subject		: Page allocation failures with b43 and p54usb
> Submitter	: Larry Finger <Larry.Finger@...inger.net>
> Date		: 2009-04-29 21:01 (18 days old)
> References	: http://marc.info/?l=linux-kernel&m=124103897101088&w=4
> Handled-By	: Johannes Berg <johannes@...solutions.net>
> 
> 

Well..  order-1 GFP_ATOMIC allocations are unreliable.  The networking
code should hanlde the situation and recover.  I assume that is
happening in this case?

Perhaps we did something in that code after 2.6.29 which increased the
frequency of the order-1 allocation attempts?  Maybe earlier kernels
used order-0 all the time?  Those are much more reliable.

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