Re: [libvirt] [PATCH] Keep track of guest paused state after disk IO / watchdog events

On Wed, Mar 31, 2010 at 01:14:13PM +0100, Daniel P. Berrange wrote: > When a watchdog/IO error occurs, one of the possible actions that > QEMU might take is to pause the guest. In this scenario libvirt > needs to update its internal state for the VM, and emit a > lifecycle event: > > VIR_DOMAIN_EVENT_SUSPENDED > > with a detail being one of: > > VIR_DOMAIN_EVENT_SUSPENDED_IOERROR > VIR_DOMAIN_EVENT_SUSPENDED_WATCHDOG > > To future proof against possible QEMU support for multiple monitor > consoles, this patch also hooks into the 'STOPPED' event in QEMU > and emits a generic VIR_DOMAIN_EVENT_SUSPENDED_PAUSED event you mean if a command was emitted on one console stopping the guest so that the event is captured on other consoles. I wonder what's the limits here, it sounds impossible to garantee a coherent view in general in case of access on an extra console outside of libvirtd control. So you plan on doing some kind of best-effort to cover this new use case ?