On Fri, Nov 09, 2012 at 03:17:39PM -0500, Sasha Levin wrote: > On Mon, Nov 5, 2012 at 8:58 PM, Hu Tao <hu...@cn.fujitsu.com> wrote: > > But in the case of panic notification, more dependency means more > > chances of failure of panic notification. Say, if we use a virtio device > > to do panic notification, then we will fail if: virtio itself has > > problems, virtio for some reason can't be deployed(neither built-in or > > as a module), or guest doesn't support virtio, etc. > > Add polling to your virtio device. If it didn't notify of a panic but > taking more than 20 sec to answer your poll request you can assume > it's dead. > > Actually, just use virtio-serial and something in userspace on the guest.
They want the guest to stop, so a memory dump can be taken by management interface. Hu Tao, lets assume port I/O is the preferred method for communication. Now, the following comments have still not been addressed: 1) Lifecycle of the stopped guest and interaction with other stopped states in QEMU. 2) Format of the interface for other architectures (you can choose a different KVM supported architecture and write an example). 3) Clear/documented management interface for the feature.
