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Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop i
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From: |
Alexandre DERUMIER |
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Subject: |
Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop is hanging forever |
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Date: |
Mon, 9 Nov 2015 11:48:45 +0100 (CET) |
adding to ceph.conf
[client]
rbd_non_blocking_aio = false
fix the problem for me (with rbd_cache=false)
(@cc address@hidden)
----- Mail original -----
De: "Denis V. Lunev" <address@hidden>
À: "aderumier" <address@hidden>, "ceph-devel" <address@hidden>, "qemu-devel"
<address@hidden>
Envoyé: Lundi 9 Novembre 2015 08:22:34
Objet: Re: [Qemu-devel] qemu : rbd block driver internal snapshot and vm_stop
is hanging forever
On 11/09/2015 10:19 AM, Denis V. Lunev wrote:
> On 11/09/2015 06:10 AM, Alexandre DERUMIER wrote:
>> Hi,
>>
>> with qemu (2.4.1), if I do an internal snapshot of an rbd device,
>> then I pause the vm with vm_stop,
>>
>> the qemu process is hanging forever
>>
>>
>> monitor commands to reproduce:
>>
>>
>> # snapshot_blkdev_internal drive-virtio0 yoursnapname
>> # stop
>>
>>
>>
>>
>> I don't see this with qcow2 or sheepdog block driver for example.
>>
>>
>> Regards,
>>
>> Alexandre
>>
> this could look like the problem I have recenty trying to
> fix with dataplane enabled. Patch series is named as
>
> [PATCH for 2.5 v6 0/10] dataplane snapshot fixes
>
> Den
anyway, even if above will not help, can you collect gdb
traces from all threads in QEMU process. May be I'll be
able to give a hit.
Den