linux-kernel - Re: [Bug #13941] x86 Geode issue

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Message-ID: <11fae7c70908161217p33830075p783880315a31b2e5@mail.gmail.com>
Date:	Sun, 16 Aug 2009 22:17:04 +0300
From:	Martin-Éric Racine <q-funk@....fi>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Alexander Viro <viro@....linux.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>
Subject: Re: [Bug #13941] x86 Geode issue

On Thu, Aug 13, 2009 at 9:34 PM, Rafael J. Wysocki<rjw@...k.pl> wrote:
> On Thursday 13 August 2009, Martin-Éric Racine wrote:
>> On Thu, Aug 13, 2009 at 5:54 PM, Rafael J. Wysocki<rjw@...k.pl> wrote:
>> > On Thursday 13 August 2009, Martin-Éric Racine wrote:
>> >> 2009/8/13 Martin-Éric Racine <q-funk@....fi>:
>> >> > On Thu, Aug 13, 2009 at 12:07 PM, Ingo Molnar<mingo@...e.hu> wrote:
>> >> >> * Martin-Éric Racine <q-funk@....fi> wrote:
>> >> >>> Yes, this bug is still valid.
>> >> >>>
>> >> >>> Ubuntu kernel team member Leann Ogasawara and I are slowly
>> >> >>> bisecting our way through the changes that took place since 2.6.30
>> >> >>> to find the commit that introduced this regression. Please stay
>> >> >>> tuned.
>> >> >>
>> >> >> hm, the only outright Geode related commit was:
>> >> >>
>> >> >>  d6c585a: x86: geode: Mark mfgpt irq IRQF_TIMER to prevent resume failure
>> >> >>
>> >> >> the jpg at:
>> >> >>
>> >> >>  http://launchpadlibrarian.net/28892781/00002.jpg
>> >> >>
>> >> >> is very out of focus - but what i could decypher suggests a
>> >> >> pagefault crash in the VFS code, in generic_delete_inode().
>> >>
>> >> This one might be a bit better:
>> >>
>> >> http://launchpadlibrarian.net/30267494/2.6.31-5.24.jpg
>
> Hmm.  This looks like a sysfs oops to my untrained eye.

The bisect I did with Leann Ogasawara has narrowed the kernel panic
down to the following:

commit f19d4a8fa6f9b6ccf54df0971c97ffcaa390b7b0
Author: Al Viro <viro@...iv.linux.org.uk>
Date: Mon Jun 8 19:50:45 2009 -0400

    add caching of ACLs in struct inode

    No helpers, no conversions yet.

    Signed-off-by: Al Viro <viro@...iv.linux.org.uk>

Best Regards,
Martin-Éric
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