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

From: Anthony Liguori
Subject: [Qemu-devel] Re: [libvirt] Re: [PATCH] Hardware watchdog patch, version 6
Date: Wed, 08 Apr 2009 09:18:55 -0500
User-agent: Thunderbird (X11/20090320)

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.


Anthony Liguori

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