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    SubjectRe: AVX "Sandy Bridge" hardware issue?
    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)



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