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Re: [PATCH v3 1/4] x86: Reject CPU policies with vendors other than the host's
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Alejandro Vallejo <alejandro.garciavallejo@xxxxxxx>
- Date: Wed, 11 Mar 2026 13:43:48 +0100
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- Cc: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Community Manager <community.manager@xxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 11 Mar 2026 12:44:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed Mar 11, 2026 at 9:26 AM CET, Jan Beulich wrote:
> On 13.02.2026 12:42, Alejandro Vallejo wrote:
>> --- a/CHANGELOG.md
>> +++ b/CHANGELOG.md
>> @@ -22,6 +22,11 @@ The format is based on [Keep a
>> Changelog](https://keepachangelog.com/en/1.0.0/)
>> - Xenoprofile support. Oprofile themselves removed support for Xen in
>> 2014
>> prior to the version 1.0 release, and there has been no development
>> since
>> before then in Xen.
>> + - Domains can no longer run on a CPU vendor if they were initially
>> launched
>> + on a different CPU vendor. This affects live migrations and
>> save/restore
>> + workflows accross mixed-vendor hosts. Cross-vendor emulation has always
>> + been unreliable, but since 2017 with the advent of speculation
>> security it
>> + became unsustainably so.
>
> While the code adjustment looks okay to me, the wording is a little odd. What
> is
> "run on a CPU vendor"? How about "Domains can no longer run on a system with
> CPUs
> of a vendor different from the one they were initially launched on"?
>
> Also, nit: "across".
Sure
Cheers,
Alejandro
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