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Date: Sat, 29 Dec 2012 15:58:02 +0100
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Subject: Re: [Qemu-devel] setting migrate_downtime results in halted vm
	(qemu 1.3)
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To: Stefan Priebe <s.priebe@profihost.ag>
Cc: qemu-devel <qemu-devel@nongnu.org>, Alexandre DERUMIER <aderumier@odiso.com>, Juan Quintela <quintela@redhat.com>

Il 29/12/2012 15:05, Stefan Priebe ha scritto:
> Hi Paolo,
> Am 29.12.2012 15:00, schrieb Paolo Bonzini:
>>> i cherry picked that one on top of 1.3 sadly it does not help. VM halts,
>>> monitor socket is no longer available kvm process is running with 100%
>>> CPU on source side.
>>
>> Can you please test master and, if it works, bisect it in reverse?
>> (That is, mark "bad" if it works, "good" if it fails).
> 
> It's working fine with qemu master.
> 
> I walked then through the bug patchset here:
> http://www.mail-archive.com/qemu-commits@nongnu.org/msg02028.html
> 
> and backported them step by step to qemu 1.3.
> 
> It starts working to me after the first 22 patches (after introducing
> the new mutex and threading for writes).

And when does it break in 1.3?

I suppose it will be between 05e72dc5812a9f461fc2c606dff2572909eafc39
and aa723c23147e93fef8475bd80fd29e633378c34d.

Probably at 2dddf6f4133975af62e64cb6406ec1239491fa89, which was supposed
to be placed before switching to the migration thread (or even squashed
in it) but ended up much earlier when the project moved from me to Juan.

Paolo