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SubjectRe: [RFC 0/2] virtio: provide a way for host to monitor critical events in the device
On Tue, Jul 24, 2012 at 02:26:33PM +0200, Sasha Levin wrote:
> On 07/24/2012 09:44 AM, Gleb Natapov wrote:
> > On Mon, Jul 23, 2012 at 10:32:39PM +0200, Sasha Levin wrote:
> >> As it was discussed recently, there's currently no way for the guest to notify
> >> the host about panics. Further more, there's no reasonable way to notify the
> >> host of other critical events such as an OOM kill.
> >>
> >> This short patch series introduces a new device named virtio-notifier which
> >> does two simple things:
> >>
> >> 1. Provide a simple interface for the guest to notify the host of critical
> > To get early OOPSes virtio will have to be compiled into the kernel. If
> > your are so keen on using virtio for this though, why not just use
> > dedicated virtio serial channel?
>
> Let's separate between having log for these events and receiving notifications about them.
>
> For the log part, I can already run a simple serial console to dump everything somewhere. I'm more concerned about having notifications about something critical happening when the guest is already up and running.
>
I am talking about notifications. Run your notification protocol over
dedicated virtio-serial channel. Logs goes to virtio-console as you've
said.

--
Gleb.


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