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Date: Tue, 15 Jul 2014 17:34:35 -0300
From: Marcelo Tosatti <mtosatti@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH uq/master] kvmclock: Ensure proper env->tsc
 value for kvmclock_current_nsec calculation
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To: Paolo Bonzini <pbonzini@redhat.com>, Andrey Korolyov <andrey@xdel.ru>
Cc: Marcin =?utf-8?Q?Gibu=C5=82a?= <m.gibula@beyond.pl>, Alexander Graf <agraf@suse.de>, qemu-devel@nongnu.org

On Tue, Jul 15, 2014 at 05:31:22PM -0300, Marcelo Tosatti wrote:
> On Tue, Jul 15, 2014 at 10:15:14PM +0200, Paolo Bonzini wrote:
> > Il 15/07/2014 22:03, Marcin Gibu=C5=82a ha scritto:
> > >>This causes a hang during migration, so I'll revert the patch from =
2.1.
> > >
> > >For me this patch series fixed all hangs I had with migration (at le=
ast
> > >with qemu 2.0).
> >=20
> > Unfortunately, someone else bisected their hangs exactly to this patc=
h:
> >=20
> > http://permalink.gmane.org/gmane.comp.emulators.qemu/286681
> >=20
> > I could not reproduce that, but I couldn't reproduce yours either so
> > I'm inclined to trust him and revert the patch.
>=20
> This patch (or some form of updating env->tsc, see changelog)=20
> is necessary.
>=20
> I was just about to reproduce it.
>=20
> Andrey, can you please provide the qemu command line ?
>=20
> Can you attempt to start VM via command line and migrate
> via QEMU monitor, then gdb -p to get a backtrace for all=20
> threads ?
>=20

The backtrace in the following message is for a different problem,
correct?

http://www.mail-archive.com/qemu-devel@nongnu.org/msg246161.html