Re: [Xen-devel] [PATCH 0/3] x86: fixes/improvements for scratch cpumask

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Wed, Feb 12, 2020 at 05:53:39PM +0100, Sander Eikelenboom wrote:
> On 12/02/2020 17:49, Roger Pau Monne wrote:
> > Hello,
> > 
> > Commit:
> > 
> > 5500d265a2a8fa63d60c08beb549de8ec82ff7a5
> > x86/smp: use APIC ALLBUT destination shorthand when possible
> > 
> > Introduced a bogus usage of the scratch cpumask: it was used in a
> > function that could be called from interrupt context, and hence using
> > the scratch cpumask there is not safe. Patch #2 is a fix for that usage.
> > 
> > Patch #3 adds some debug infrastructure to make sure the scratch cpumask
> > is used in the right context, and hence should prevent further missuses.
> > 
> > Thanks, Roger.
> 
> Hi Roger,
> 
> Do you still want me to test the "panic" patch ?
> Or test this series instead ?

I've been able to trigger this myself, so if you can give a try to the
series in order to assert it fixes your issue that would be great.

Thanks.

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