Re: [PATCH-for-4.17] xen/sched: migrate timers to correct cpus after suspend

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On Fri, Oct 28, 2022 at 10:12:36AM +0000, Andrew Cooper wrote:
> On 28/10/2022 11:08, Juergen Gross wrote:
> > On 27.10.22 20:13, Marek Marczykowski-Górecki wrote:
> >
> > This is very weird. The data suggests that the scheduling resource
> > pointer
> > for cpu 1 was NULL, but I can't see how this can be the case without
> > causing
> > similar crashes without this patch.
> >
> > Are there any additional patches related to cpu on/offlining or
> > suspend/resume
> > in the hypervisor?

No such patches, it was this:
https://github.com/marmarek/xen/commits/master-credit-timers

> QubesOS runs with smt=0 by default.  Siblings ought to be parked at this
> point.

Yes, indeed this test was with smt=off.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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