From: MK <mk@cognitivedissonance.ca>
To: linux-kernel@vger.kernel.org
Subject: Re: AVX "Sandy Bridge" hardware issue?
Date: Fri, 15 Jul 2011 09:12:34 -0400 [thread overview]
Message-ID: <20110715091234.087d94a2.mk@cognitivedissonance.ca> (raw)
In-Reply-To: <m2k4bn57j4.fsf@firstfloor.org>
On Tue, 12 Jul 2011 17:49:35 -0700
Andi Kleen <andi@firstfloor.org> wrote:
> If there's a problem then it's likely in the VM. Maybe it leaks
> AVX partially through only.
>
> For example I had a similar problem a long time ago on a system
> which had inconsistent CPU features for different CPUs. The kernel
> will chose the least common denominator, but an application
> directly calling CPUID can sometimes see different flags and then
> crash when it switches CPUs.
>
> The symptoms would be consistent with that.
>
> I would contact the VM vendor.
I think I will go the developer list for openVZ first and get some more
info. The vendor is trepidatious as no one else has had a problem (I
dunno how many, if any, of the other clients use mod_perl) and this
could be an unsolvable headache headache for them.
Thanks all for the input!
--
"Enthusiasm is not the enemy of the intellect." (said of Irving Howe)
"The angel of history[...]is turned toward the past." (Walter Benjamin)
next prev parent reply other threads:[~2011-07-15 13:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-12 20:16 MK
2011-07-12 21:06 ` Chris Friesen
2011-07-15 13:06 ` MK
2011-07-13 0:49 ` Andi Kleen
2011-07-13 16:17 ` Chris Friesen
2011-07-15 13:12 ` MK [this message]
2011-07-20 13:55 ` Andy Lutomirski
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