Re: [RFCv1 7/7] KVM: unmap guest memory using poisoned pages

From: Andi Kleen
Date: Wed Apr 07 2021 - 11:10:42 EST

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David Hildenbrand <david@xxxxxxxxxx> writes:

> I have no idea how expensive would be bouncing writes (and reads?)
> through the kernel. Did you ever experiment with that/evaluate that?

I would expect it to be quite expensive, as in virtio IO performance
tanking.

-Andi

Next message: Liam Howlett: "[PATCH] arch/arm64/kernel/traps: Use find_vma_intersection() in traps for setting si_code"
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In reply to: David Hildenbrand: "Re: [RFCv1 7/7] KVM: unmap guest memory using poisoned pages"
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