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Re: [Xen-devel] [PATCH] nestedhvm: ASID emulation

  • To: Christoph Egger <Christoph.Egger@xxxxxxx>, Keir Fraser <keir@xxxxxxx>
  • From: Keir Fraser <keir.xen@xxxxxxxxx>
  • Date: Fri, 15 Apr 2011 10:24:09 +0100
  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Fri, 15 Apr 2011 02:24:53 -0700
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  • Thread-topic: [Xen-devel] [PATCH] nestedhvm: ASID emulation

On 15/04/2011 10:08, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote:

>> You didn't notice my subtle error in switching n1 and n2 asid selection in
>> svm_asid_handle_vmrun()? ;-)
> Oh, now that you mention it...

Yeah, I fixed it before I checked it in (xen-unstable:23229).

> A l2 smp guest actually boots up. Maybe I need to use more vcpus than I
> have physical cpus to hit that bug.

I think it would have been a source of very subtle quite hard-to-repro bugs.
Not something you'd pick up in a simple does-it-boot smoke test. So a pretty
nasty bug all round!

 -- Keir

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