Re: [PATCH v2 11/27] KVM: x86/mmu: Zap only the relevant pages when removing a memslot

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On 26.06.20 19:32, Sean Christopherson wrote:
/cast <thread necromancy>

On Tue, Aug 20, 2019 at 01:03:19PM -0700, Sean Christopherson wrote:

[...]

I don't think any of this explains the pass-through GPU issue.  But, we
have a few use cases where zapping the entire MMU is undesirable, so I'm
going to retry upstreaming this patch as with per-VM opt-in.  I wanted to
set the record straight for posterity before doing so.

Hey Sean,

Did you ever get around to upstream or rework the zap optimization? The way I read current upstream, a memslot change still always wipes all SPTEs, not only the ones that were changed.


Thanks,

Alex




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