Re: [PATCH] KVM: x86/mmu: Add capability to zap only sptes for the affected memslot

From: Sean Christopherson
Date: Mon Jul 20 2020 - 23:03:24 EST


+Weijiang

On Mon, Jul 13, 2020 at 12:06:50PM -0700, Sean Christopherson wrote:
> The only ideas I have going forward are to:
>
> a) Reproduce the bug outside of your environment and find a resource that
> can go through the painful bisection.

We're trying to reproduce the original issue in the hopes of biesecting, but
have not yet discovered the secret sauce. A few questions:

- Are there any known hardware requirements, e.g. specific flavor of GPU?

- What's the average time to failure when running FurMark/PassMark? E.g.
what's a reasonable time to wait before rebooting to rerun the tests (I
assume this is what you meant when you said you sometimes needed to
reboot to observe failure).

Thanks!