From: Paolo Bonzini <pbonzini@redhat.com>
To: Nick Thomas <nick@bytemark.co.uk>,
"Qemu-devel@nongnu.org" <Qemu-devel@nongnu.org>
Cc: kvm@vger.kernel.org
Subject: Re: AMD Opteron 6276 to Intel Xeon E5645 live migration failure
Date: Fri, 28 Feb 2014 13:57:06 +0100 [thread overview]
Message-ID: <531087A2.7070604@redhat.com> (raw)
In-Reply-To: <53107E2E.10201@bytemark.co.uk>
Il 28/02/2014 13:16, Nick Thomas ha scritto:
> I'd love to get this working, but I'm a little ignorant on where to
> begin, or even if it's possible at all. Are these CPUs just too old, or
> is a fixup missing in qemu (or kvm)?
It's the latter (in kvm). Note that for migration to work, especially
for such different models, you have to disable CPU features that aren't
present in both models. In general the way to do this is to add "-cpu".
I'd start debugging with "-cpu kvm64" on both sides.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Nick Thomas <nick@bytemark.co.uk>,
"Qemu-devel@nongnu.org" <Qemu-devel@nongnu.org>
Cc: kvm@vger.kernel.org
Subject: Re: [Qemu-devel] AMD Opteron 6276 to Intel Xeon E5645 live migration failure
Date: Fri, 28 Feb 2014 13:57:06 +0100 [thread overview]
Message-ID: <531087A2.7070604@redhat.com> (raw)
In-Reply-To: <53107E2E.10201@bytemark.co.uk>
Il 28/02/2014 13:16, Nick Thomas ha scritto:
> I'd love to get this working, but I'm a little ignorant on where to
> begin, or even if it's possible at all. Are these CPUs just too old, or
> is a fixup missing in qemu (or kvm)?
It's the latter (in kvm). Note that for migration to work, especially
for such different models, you have to disable CPU features that aren't
present in both models. In general the way to do this is to add "-cpu".
I'd start debugging with "-cpu kvm64" on both sides.
Paolo
next prev parent reply other threads:[~2014-02-28 12:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-28 12:16 AMD Opteron 6276 to Intel Xeon E5645 live migration failure Nick Thomas
2014-02-28 12:16 ` [Qemu-devel] " Nick Thomas
2014-02-28 12:57 ` Paolo Bonzini [this message]
2014-02-28 12:57 ` Paolo Bonzini
2014-02-28 13:15 ` Nick Thomas
2014-02-28 13:15 ` [Qemu-devel] " Nick Thomas
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