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From: John Snow <jsnow@redhat.com>
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Date: Wed, 5 Apr 2017 18:18:56 -0400
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Subject: Re: [Qemu-devel] external snapshots freezes block device since qemu
 2.8
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To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Piotr Rybicki <piotr.rybicki@innervision.pl>
Cc: qemu-devel@nongnu.org, Kashyap Chamarthy <kchamart@redhat.com>



On 03/09/2017 07:26 AM, Dr. David Alan Gilbert wrote:
> * Piotr Rybicki (piotr.rybicki@innervision.pl) wrote:
>> Hello there.
>>
>> I discovered, that since qemu 2.8 , external snapshots (very similar to:
>> http://wiki.libvirt.org/page/Live-disk-backup-with-active-blockcommit),
>> freezes block device after:
>>
>> # virsh blockcommit (...)
>>
>> There is no error message after completion of the command above.
>> I'm using gluster + ZFS fuse mount as a storage for a VM on gentoo.
>> libvirt debug showed nothing helpful.
>> With qemu <2.8 -: snapshots are working as expected.
>>
>> Is this a known issue?
>> Is it qemu or libvirt ?
>>
>> If it helps, how can i diagnose this further?
> 
> I don't know of it, cc'd in jsnow.
> Have you tried bisecting?
> 
> Dave
> 
>> Thank You & Best regards
>> Piotr Rybicki
>>
> --
> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
> 

I'm cleaning out my inbox and I seem to have missed this thread. Was
there any resolution?