Re: [PATCH] KVM: VMX: require virtual NMI support

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On Mon, Oct 30, 2017 at 09:34:00AM +0100, Paolo Bonzini wrote:
> On 27/10/2017 10:38, Fabian Grünbichler wrote:
> > On Wed, Oct 25, 2017 at 11:07:54AM +0200, Fabian Grünbichler wrote:
> >> On Wed, Oct 25, 2017 at 10:40:11AM +0200, Paolo Bonzini wrote:
> >>> On 25/10/2017 10:12, Fabian Grünbichler wrote:
> >>>> any update on this? 4.14 is soon out the door, and 4.13 with the
> >>>> breaking change just got released as part of Ubuntu 17.10 / Artful..
> >>>
> >>> I had posted a patch on October 10th, but no one replied with test results.
> >>>
> >>
> >> sorry, missed the (second) thread.
> >>
> >> currently building, will get back with test results ASAP.
> > 
> > so, while we haven't found any affected hardware in our test lab (not
> > even in the to-be-discarded pile), feedback from users has been positive
> > across the board for the following CPUs which were not able to use KVM
> > without the patch:
> > 
> > - Intel Xeon 3040 (Conroe)
> > - Intel Xeon 5050 (Dempsey)
> > - Intel Xeon 5130 (Woodcrest)
> > - Intel Xeon E3-1256L V2 (Ivy Bridge)
> 
> Ivy Bridge definitely worked without the patch.
> 
> Can you send me a link to the exact patch you applied (pastebin or
> something like that)?
> 

the exact wording was the following, so it is possible that that user
confused an unrelated (kernel or other) issue with the one at hand:

-----%<-----

After rolling back the 5.1 update, and staying on pve 5.0, testing the
kernel posted above seams to work. However, I will be staying with the
4.10.17 kernel for now (and pve 5.0). 

-----%<-----

the switch from 4.10 based to 4.13 based coincides with a minor release
unfortunately. like I said, we don't have any test HW available, so we
have to rely on user reports.

there has been no further feedback so far.

patch is available at http://sprunge.us/ULML




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