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    SubjectRe: [PATCH x86 kvm] Fix register corruption in pvclock_scale_delta
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    On Wed, 2011-06-22 at 10:40 +0100, Avi Kivity wrote:
    > On 06/22/2011 12:35 PM, Ian Campbell wrote:
    > > On Sun, 2011-06-19 at 15:44 +0300, Avi Kivity wrote:
    > > > On 06/16/2011 06:50 AM, Zachary Amsden wrote:
    > > > > The 128-bit multiply in pvclock.h was missing an output constraint for
    > > > > EDX which caused a register corruption to appear.
    > >
    > > Was there any particular symptom associated with corruption at that
    > > particular point or just general badness?
    > >
    >
    > Time went backwards and forwards as vcpus were migrated across cpus.

    Oops!

    > The problem was in the host, not the guest, so Xen should not be affected.

    Good to know, thanks!

    Ian.



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