[libvirt] libvirt 3.5.0 locks

[Martin Kletzander]

On Fri, Jul 14, 2017 at 11:53:15AM +0300, Vasiliy Tolstov wrote:
>2017-07-14 10:27 GMT+03:00 Martin Kletzander <mkletzan at redhat.com>:
>> On Fri, Jul 14, 2017 at 10:09:00AM +0300, Vasiliy Tolstov wrote:
>>>
>>> Hi. I'm testing libvirt 3.5.0 and have many issues like this:
>>>
>>> Jul 14 09:47:25 cn25 libvirtd[18820]: 2017-07-14 06:47:25.598+0000:
>>> 18841: error : qemuDomainObjBeginJobInternal:3872 : Timed out during
>>> operation: cannot acquire state change lock (held by
>>> remoteDispatchConnectGetAllDomainStats)
>>> Jul 14 09:47:25 cn25 libvirtd[18820]: 2017-07-14 06:47:25.598+0000:
>>> 18841: warning : qemuDomainObjBeginJobInternal:3860 : Cannot start job
>>> (query, none) for domain 147565; current job is (query, none) owned by
>>> (18828 remoteDispatchConnectGetAllDomainStats, 0 <null>) for (53670s,
>>> 0s)
>>> Jul 14 09:46:55 cn25 libvirtd[18820]: 2017-07-14 06:46:55.576+0000:
>>> 18836: error : virNetDevTapInterfaceStats:751 : internal error:
>>> /proc/net/dev: Interface not found
>>> Jul 14 09:46:55 cn25 libvirtd[18820]: 2017-07-14 06:46:55.542+0000:
>>> 18832: warning : qemuGetProcessInfo:1428 : cannot parse process status
>>> data
>>> Jul 14 09:46:31 cn25 libvirtd[18820]: 2017-07-14 06:46:31.050+0000:
>>> 18838: warning : qemuGetProcessInfo:1428 : cannot parse process status
>>> data
>>>
>>> Domain in status in shutdown
>>> as i see tap device already removed from the system, so
>>> virNetDevTapInterfaceStats says right info.
>>>
>>> My question - why lock now released and why only libvirt restart can
>>> helps in this case
>>
>>
>> What's be stacktrace of libvirtd in this case?
>>
>
>
>How can i get it when new lock appears?
>

gdb -batch -p $(pgrep libvirtd) -ex 't a a bt'

>
>
>--
>Vasiliy Tolstov,
>e-mail: v.tolstov at selfip.ru
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