From: Avi Kivity <avi@redhat.com>
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Zachary Amsden <zamsden@redhat.com>, kvm <kvm@vger.kernel.org>,
Linux-kernel <linux-kernel@vger.kernel.org>,
Ulrich Obergfell <uobergfe@redhat.com>
Subject: Re: [PATCH x86 kvm] Fix register corruption in pvclock_scale_delta
Date: Wed, 22 Jun 2011 12:40:44 +0300 [thread overview]
Message-ID: <4E01B89C.7050704@redhat.com> (raw)
In-Reply-To: <1308735302.6920.172.camel@zakaz.uk.xensource.com>
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.
The problem was in the host, not the guest, so Xen should not be affected.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-06-22 9:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-16 3:50 [PATCH x86 kvm] Fix register corruption in pvclock_scale_delta Zachary Amsden
2011-06-19 12:44 ` Avi Kivity
2011-06-22 9:35 ` Ian Campbell
2011-06-22 9:39 ` Avi Kivity
2011-06-22 9:40 ` Avi Kivity [this message]
2011-06-22 9:52 ` Ian Campbell
-- strict thread matches above, loose matches on Subject: below --
2011-08-30 8:58 Duncan Sands
2011-08-30 11:39 ` Avi Kivity
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