Re: [Xen-devel] [PATCH v6 11/13] xen: support the Null scheduler

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Thu, 14 Jun 2018, Andrew Cooper wrote:
> On 14/06/18 14:40, Jan Beulich wrote:
> >>>> On 13.06.18 at 23:14, <sstabellini@xxxxxxxxxx> wrote:
> >> The Null scheduler has been in the tree long enough to be marked
> >> supported.
> > Wasn't there at least one problem pointed out with it that last time
> > is was proposed to mark it supported (not overly long ago)?
> 
> The PV-shim work has identified that there are definitely functional
> problems with the Null scheduler.  ISTR that after a while, vcpus just
> ceased to be scheduled.
> 
> I don't think its reasonable to alter the support status with this issue
> outstanding.

I completely missed this report, probably because I haven't paid
attention to PV-shim. Do you have any more information about this? The
report is a bit vague. If I can't repro it, I can't fix it.

Couldn't it be that is normal because after a while you ran out of
pcpus?

Dario, do you have any opinion on this?

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