[libvirt-users] reboot problem with libxl

[Alvin Starr]

I am not sure if this is a libvirt or libxl problem.

It looks as if each running vm has an associated event thread and this 
thread calls the libxl_destroy to clean up the rebooting processes.
Possibly these threads should lock to insure synchronization and allow 
only one reboot or termination at a time.

I will try to add some diagnostics and run a few more tests.


On 10/31/2014 09:28 AM, Martin Kletzander wrote:
> On Fri, Oct 31, 2014 at 08:34:48AM -0400, Alvin Starr wrote:
>> I was sort of hoping that is was something simple like setting the
>> "do_the_right_thing" flag.
>>
>>
>> The libvirtd kicks out
>> 2014-10-31 11:58:57.111+0000: 8741: error : virRegisterNetworkDriver:549
>> : driver in virRegisterNetworkDriver must not be NULL
>> 2014-10-31 11:59:29.379+0000: 8840: error : virRegisterNetworkDriver:549
>> : driver in virRegisterNetworkDriver must not be NULL
>> 2014-10-31 12:02:03.419+0000: 14712: error :
>> virRegisterNetworkDriver:549 : driver in virRegisterNetworkDriver must
>> not be NULL
>> 2014-10-31 12:02:20.547+0000: 14712: error : virNetlinkEventCallback:343
>> : nl_recv returned with error: No buffer space available
>> 2014-10-31 12:02:21.873+0000: 17428: error :
>> virRegisterNetworkDriver:549 : driver in virRegisterNetworkDriver must
>> not be NULL
>> 2014-10-31 12:03:06.721+0000: 17428: error : virNetlinkEventCallback:343
>> : nl_recv returned with error: No buffer space available
>>
>>
>> (I deleted the other errors caused by trying to load drivers that don't
>> exits).
>>
>> I reboot 3 systems mirantis_[457]
>>
>> /var/log/libxl/* kicks out.
>> mirantis_4.log:libxl: error:
>> libxl_dm.c:1311:libxl__destroy_device_model: Device Model already exited
>> mirantis_5.log:libxl: error:
>> libxl_dm.c:1311:libxl__destroy_device_model: Device Model already exited
>>
>> These are more interesting.
>>
>> I wonder if libxl has a race condition.
>>
>
> I'm completely unaware of libxl works, so I can only guess.  But this
> looks like an error in libxl.  Maybe someone else has an idea?
>
> Martin
>
>> On 10/31/2014 02:58 AM, Martin Kletzander wrote:
>>> On Thu, Oct 30, 2014 at 01:00:04PM -0400, Alvin Starr wrote:
>>>>
>>>> If I reboot a single vm through libvirt/libxl the system reboots
>>>> normally.
>>>> If I have several vm's reboot at the same time then The systems go 
>>>> into
>>>> a paused state and do not reboot.
>>>> I then have to kill them via xl and   restart them.
>>>>
>>>
>>> Do logs [1] uncover something?
>>>
>>> Martin
>>>
>>> [1] http://libvirt.org/logging.html
>>
>>
>> -- 
>> Alvin Starr                   ||   voice: (905)513-7688
>> Netvel Inc.                   ||   Cell:  (416)806-0133
>> alvin at netvel.net              ||
>>


-- 
Alvin Starr                   ||   voice: (905)513-7688
Netvel Inc.                   ||   Cell:  (416)806-0133
alvin at netvel.net              ||