Re: [Xen-devel] Xen4.2 S3 regression?

[Keir Fraser <keir@xxxxxxx>]

On 20/09/2012 09:03, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

>>>> On 20.09.12 at 08:13, Keir Fraser <keir.xen@xxxxxxxxx> wrote:
>> CPU#1 got stuck in loop in cpu_init() as it appears to be Åalready
>> initialised in cpu_initialized bitmap. CPU#0 detects it is stuck and
>> carries on, but the resume code assumes all CPUs are brought back online and
>> crashes later.
> 
> So this would suggest play_dead() (-> cpu_exit_clear() ->
> cpu_uninit()) not getting reached during the suspend cycle.
> That should be fairly easy to verify, as the serial console
> ought to still work when the secondary CPUs get offlined.

Yes.

> That might imply cpumask_clear_cpu(cpu, &cpu_online_map)
> not getting reached in __cpu_disable(), which would be in line
> with the observation that none of the logs provided so far
> showed anything being done by fixup_irqs() (called right
> after clearing the online bit).

I did just test cpu offline/online via xen-hptool myself, and that does
work. So perhaps this is platform specific, or S3 specific...

 -- Keir

> Jan



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