Messages in this thread | | | From | Rusty Russell <> | Subject | Re: [RFC 0/2] virtio: provide a way for host to monitor critical events in the device | Date | Wed, 25 Jul 2012 10:06:37 +0930 |
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On Tue, 24 Jul 2012 15:01:59 +0200, Sasha Levin <levinsasha928@gmail.com> wrote: > virtio on it's own was introduced to help solve the fragmentation > around virtualized devices, so I don't think that the main purpose of > doing virtio drivers is due to any performance benefits virtio may > provide.
There's one argument in your favor (with my Linaro hat on): ARM wants a virtio reboot button, which would look remarkably similar. There's no standard ARM hardware for this.
So a more generalized virtio-event device might make sense. But there are almost an infinite number of guest events we might want: panics, oom, low memory, stuck devices, deadlock, etc, etc. I'm concerned about trying to standardize them. If we include a unspecified free-form string, people will end up relying on the contents. If we add a feature bit for every new event, we'll end up running out of feature bits :)
CC'ing Amit for opinion over how much of this should be done via virtio-serial.
Cheers, Rusty.
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