Re: [kvm-devel] [PATCH 10/13] KVM: Wire up hypercall handlers toa central arch-independent location

From: Arjan van de Ven
Date: Thu Feb 22 2007 - 08:12:30 EST

> Somthing else that came up in a conversation with Dor: the need for a
> clean way to raise a guest interrupt. The guest may be sleeping in
> userspace, scheduled out, or running on another cpu (and requiring an
> ipi to get it out of guest mode).

yeah it'd be nice if I could just call a function for it rather than
poking into kvm internals ;)

> Right now I'm thinking about using the signal machinery since it appears
> to do exactly the right thing.

signals are *expensive* though.

If you design an interrupt interface, it'd rock if you could make it
such that it is "raise <this> interrupt within <x> miliseconds from
now", rather than making it mostly synchronous. That way irq mitigation
becomes part of the interface rather than having to duplicate it all
over the virtual drivers...

if you want to mail me at work (you don't), use arjan (at)
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