On 28.10.22 12:22, Marek Marczykowski-Górecki wrote:
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-timersQubesOS runs with smt=0 by default. Siblings ought to be parked at this point.Yes, indeed this test was with smt=off.
Ah, this is subtle. The CPU_ONLINE notifiers are called for the siblings, too, resulting in above error. Preparing V2 of the patch. Juergen
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