linux-kernel - Re: 2.6.34-rc2 - crash on shutdown

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Message-ID: <bd4cb8901003230631q22cdac6dg8011489b94c6d5e0@mail.gmail.com>
Date:	Tue, 23 Mar 2010 14:31:04 +0100
From:	Stephane Eranian <eranian@...gle.com>
To:	Clemens Ladisch <clemens@...isch.de>
Cc:	David R <david@...olicited.net>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.34-rc2 - crash on shutdown

On Tue, Mar 23, 2010 at 1:02 PM, Clemens Ladisch <clemens@...isch.de> wrote:
> David R wrote:
>> I recently upgraded my kernel to the .34 rc, and I'm getting the
>> following crash on shutdown (see attached console image)
>
> Mee too, also in amd_pmu_cpu_offline().
>
> The only pointer access in this function is cpuhw->amd_nb, but
> I don't see any obvious bugs.
>
>
I reported a problem with the AMD initialization just last week.
There is an issue with amd_pmu_cpu_online() which gets called
too early, and thus fails. That leaves some bogus state and causes
a crash in amd_pmu_cpu_offline().

I proposed a fix which was rejected. The alternative involves moving
some the of CPU initialization code (on AMD) to an earlier position,i.e.,
which would be executed before the CPU_STARTED notifier. Nobody
has proposed anything else so far.


> Regards,
> Clemens
>



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