From mboxrd@z Thu Jan  1 00:00:00 1970
From: Larry Finger <Larry.Finger-tQ5ms3gMjBLk1uMJSBkQmQ@public.gmane.org>
Subject: Re: [Bug #13319] Page allocation failures with b43 and p54usb
Date: Sun, 07 Jun 2009 08:10:08 -0500
Message-ID: <4A2BBC30.2030300@lwfinger.net>
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To: "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>
Cc: Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Kernel Testers List <kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Johannes Berg <johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>

Rafael J. Wysocki 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-tQ5ms3gMjBLk1uMJSBkQmQ@public.gmane.org>
> Date		: 2009-04-29 21:01 (40 days old)
> References	: http://marc.info/?l=linux-kernel&m=124103897101088&w=4
> Handled-By	: Johannes Berg <johannes-cdvu00un1VgdHxzADdlk8Q@public.gmane.org>

This bug is extremely difficult to pin down. I cannot reproduce it at
will. The system has to be up for a long time, which is difficult with
testing the late RC's of 2.6.30 and the code in wireless-testing so
that new bugs don't end up in 2.6.31-RCX. That said, it still was in
2.6.30-RC6 and I'm not aware of any changes since that would fix it.

My operating kernel is patched with additional diagnostics to help me
understand why a kmalloc request for a buffer of 1390 bytes suddenly
ends up as an O(1) request. Unfortunately, I don't have any answers.

Larry