[Qemu-devel] Re: [libvirt] Re: [PATCH] Hardware watchdog patch, version 6

[Anthony Liguori <anthony@codemonkey.ws>]

Daniel P. Berrange wrote:
> On Tue, Apr 07, 2009 at 04:19:42PM -0500, Hollis Blanchard wrote:
>   
>> Hi Rich, your watchdog qemu patch is working fine for me (i6300esb,
>> default reset behavior), but I was wondering... how should libvirt find
>> out about the watchdog firing?
>>     
>
> This falls into the general problem space of how does QEMU notify its
> management app  of interesting events. We already really want the
> ability to be notify of ENOSPC errors in disks, and also would like
> to know if the VM is paused for any reason outside our control.
> There have been proposals to just print an async message to the 
> monitor upon events, that mgmt app could then parse. This is a little
> fragile though, so for a long term solutiuon we really need the generic
> libqemumonitor.so type API with formal async notification support.
>   

I just posted a patch series that demonstrate how I think it should 
work.  FWIW, I think notifications are orthogonal to libqemumonitor.so 
and a non-human monitor mode.

Regards,

Anthony Liguori