[Bug 206579] KVM with passthrough generates "BUG: kernel NULL pointer dereference" and crashes

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https://bugzilla.kernel.org/show_bug.cgi?id=206579

--- Comment #40 from muncrief (rmuncrief@humanavance.com) ---
(In reply to Anthony from comment #39)
> (In reply to muncrief from comment #38)
> > (In reply to Anthony from comment #37)
> ... Oh if that's the case then my understanding has just been poor as I assumed
> the kvm_apicv_update_request counter should be higher to show the times
> where apicv has been activated and deactivated which should also be
> reflected in a trace. At least that is what it reads like to me reading this
> patch - https://lore.kernel.org/patchwork/patch/1153605/

I took a look at that just out of curiosity Anthony but unfortunately I don't
know anything about the Linux kernel code, I've just been following along with
the devs as best I can. I'm simply a retired hardware/firmware/software
designer from the olden days. And by "olden" I mean before Linux, and even
things like CGA graphics, existed :)

I was just passing along what I learned from Suravee, and some cursory
observation of tiny related code segments. All I was ever able to accomplish
was a partial understanding of the first 5 bits of the avic_inhibit_reasons
output :)

Your question is an interesting one though, I wasn't even aware that a request
counter existed!

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