Re: [Qemu-devel] Unresponsive linux guest once migrated

[Chris Dunlop]

On Fri, Mar 28, 2014 at 12:29:18AM +0100, Marcin Gibuła wrote:
> W dniu 2014-03-27 23:52, Chris Dunlop pisze:
>> Hi,
>>
>> I have a problem where I migrate a linux guest VM, and on the
>> receiving side the guest goes to 100% cpu as seen by the host, and
>> the guest itself is unresponsive, e.g. not responding to ping etc.
>> The only way out I've found is to destroy the guest.
>>
>> This seems to only happen if the guest has been idle for an extended
>> period (e.g. overnight). I've migrated the guest 100 times in a row
>> without any problems when the guest has been used "a little" (e.g.
>> logging in and looking around, it's not doing anything normally).
> 
> Hi,
> 
> I've seen very similar problem on our installation. Have you tried to
> run with kvm-clock explicitly disabled (either via no-kvmclock in
> guest kernel or with -kvm-clock in qemu) ?

No, I haven't tried it yet (I've confirmed kvm-clock is currently
being used). I'll have a look at it.

Did it help your issue?

Thanks,

Chris