Re: [Xen-devel] dom0less + sched=null => broken in staging

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Wed, 21 Aug 2019, Dario Faggioli wrote:
> On Wed, 2019-08-14 at 19:35 +0200, Dario Faggioli wrote:
> > On Wed, 2019-08-14 at 09:27 -0700, Stefano Stabellini wrote:
> > > On Wed, 14 Aug 2019, Dario Faggioli wrote:
> > > > On Tue, 2019-08-13 at 14:14 -0700, Stefano Stabellini wrote:
> > > > Now, while staring at the code of that loop, I've seen that
> > > > pick_cpu()
> > > > may mess up with the scratch cpumask for the CPU, which I don't
> > > > think
> > > > is a good thing.
> > > > 
> > > > So, can you also try this third debug-patch?
> > > 
> > > Yep, see attached
> > > 
> > Ok, thanks again. So, cpumask_scratch() being mishandled was part of
> > the problem, but not the root-cause.
> > 
> > Well, it was worth a shot. :-P
> > 
> > I think we need to get rid of the loop in which we're stuck. 
> >
> Hey, Stefano, Julien,
> 
> Here's another patch.
> 
> Rather than a debug patch, this is rather an actual "proposed
> solution".
> 
> Can you give it a go? If it works, I'll spin it as a proper patch.

Yes, this seems to solve the problem, thank you!

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