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SubjectRe: [PATCH 1/4] kvm: Destroy & free KVM devices on release
On Wed, Oct 30, 2013 at 04:42:15PM +0100, Paolo Bonzini wrote:
> Il 30/10/2013 16:33, Gleb Natapov ha scritto:
> > > Hmm, ok. In that case I can drop this patch and I think the rest just
> > > boils down to userspace use of the device. I had been close()'ing the
> > > kvm device fd when all QEMU vfio devices are detached, but I can just as
> > > easily leave it open in case a new device is added later. I'll send out
> > > a new series after doing some more review and testing. Do you have any
> > > comments on the rest of the series? Thanks,
> >
> > If I understand 4/4 correctly if there is VFIO device connected we
> > assume non coherent domain. How hard it would be to do proper checking
> > in this path series?
>
> Yes, that's my understanding as well. Is the performance impact measurable?
>
We grant a guest permission to call wbinvd() needlessly.

--
Gleb.


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