Messages in this thread | | | From | Sasha Levin <> | Date | Fri, 9 Nov 2012 15:17:39 -0500 | Subject | Re: [PATCH v11] kvm: notify host when the guest is panicked |
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On Mon, Nov 5, 2012 at 8:58 PM, Hu Tao <hutao@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.
> We choose IO because compared to virtio device, it is not that heavy and > less problematic.
Less problematic? Heavy? Are there any known issues with virtio that should be fixed? You make virtio sound like an old IDE drive or something.
Thanks, Sasha
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