linux-ext4 - Re: 2.6.25-git2: BUG: unable to handle kernel paging request at ffffffffffffffff

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Message-ID: <alpine.LFD.1.10.0804241539150.2779@woody.linux-foundation.org>
Date:	Thu, 24 Apr 2008 15:41:27 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Jiri Slaby <jirislaby@...il.com>
cc:	Zdenek Kabelac <zdenek.kabelac@...il.com>,
	Ingo Molnar <mingo@...e.hu>, "Rafael J. Wysocki" <rjw@...k.pl>,
	paulmck@...ux.vnet.ibm.com, David Miller <davem@...emloft.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ext4@...r.kernel.org, herbert@...dor.apana.org.au,
	Pekka Enberg <penberg@...helsinki.fi>,
	Christoph Lameter <clameter@....com>
Subject: Re: 2.6.25-git2: BUG: unable to handle kernel paging request at
 ffffffffffffffff



On Fri, 25 Apr 2008, Jiri Slaby wrote:
> 
> 20 arpings running on wlan0 (don't know if this is related so far), suspend,
> resume, right after resume:
> 
> freed 114
> alloced 115
> freed 115
> alloced 116
> WHAT THE HELL (000a3ff8):
> ff00aa00deadcc22 ff00aa00deadcc22 ff00aa00deadcc22 ff00aa00deadcc22

Very interesting indeed.

> Shouldn't be 2.6.25 uttered as broken until this is solved to not corrupt
> anyone's data? I'm going to play with that testing program further in the
> meantime.

Do you actually see this with _plain_ 2.6.25? So far I've assumed that all 
the reports are about post-2.6.25 issues.

Also, it does seem like you can re-create this at will in ways that others 
can not. Could you try to bisect it a bit? Right now we have no real clue 
what it is all about, except that it seems to be related to suspend/resume 
and there are some indications that it's about networking (and _perhaps_ 
wireless in particular).

		Linus
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