Re: Linux PV domU with >1 vCPU never resumes after xl save/restore

[George Dunlap <gwd@xxxxxxxxxxxxxx>]

On Tue, Aug 4, 2026 at 6:02 PM Jan Beulich <jbeulich@xxxxxxxx> wrote:

On 04.08.2026 08:12, George Dunlap wrote:
> Saving and restoring a multi-vcpu PV guest appears to have been broken in
> Linux for some time (observed 6.6.56 and 6.12.86).  Report below from
> Claude Fable; I've independently verified the behavior on vanilla Linux
> 6.6.56.  Claude seems to think it's a bug in Linux.

Just to double check, as there was a crucial fix there recently: This is with
a Xen including bedbc17d8407 ("x86/domctl: restore all registers in
arch_{get,set}_info_guest()")?

Ah, yes, that seems to have done the trick.  Sorry for he noise.

 -George