Re: [libvirt] [RFC PATCH v2 0/3] Start fixing the pvpanic mess
Il 21/08/2013 18:48, Daniel P. Berrange ha scritto:
No, <on_crash> is the right thing to be using for this from
libvirt's pov & I don't think we should invent something new.
The <on_crash> element has always been intended to represent
handling of guest panics, not qemu internal errors.
Actually for Xen HVM guests, it mostly traps things such as failed
vmentries. The Xen PV-on-HVM drivers do not register a panic notifier
that moves the guest to the "crashed" state.
<on_crash> cannot be salvaged, in my opinion, because all domain XMLs in
the wild will have a setting that causes libvirt to add "-device
isa-pvpanic". Thus changing libvirt versions will change guest
hardware, which is _very_ bad.
In addition, Windows XP and 2003 will show the annoying device wizard
upon a libvirt upgrade, and fixing this is what surfaced all the mess.
Paolo