Re: [PULL] topic/iomem-mmap-vs-gup

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+Paolo

On Mon, May 10, 2021, Jason Gunthorpe wrote:
> On Mon, May 10, 2021 at 04:55:39PM +0200, Daniel Vetter wrote:
> 
> > yeah vfio is still broken for the case I care about. I think there's
> > also some questions open still about whether kvm really uses
> > mmu_notifier in all cases correctly, 
> 
> IIRC kvm doesn't either.

Yep, KVM on x86 has a non-trivial number of flows that don't properly hook into
the mmu_notifier.  Paolo is working on fixing the problem, but I believe the
rework won't be ready until 5.14.




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