Re: [Xen-devel] [PATCH v2 1/2] xen: fix a (latent) cpupool-related race during domain destroy

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Fri, 2016-07-15 at 16:23 +0200, Dario Faggioli wrote:
> On Fri, 2016-07-15 at 14:52 +0200, Juergen Gross wrote:
> > On 15/07/16 13:52, Dario Faggioli wrote:
> > > Therefore, I still think this patch is correct, but I'm up for
> > > investigating further and finding a way to solve the "zombie in
> > > cpupool" issue as well.
> > I'm not saying your patch is wrong. I just wanted to give you a
> > hint
> > about the history of the stuff you are changing. :-)
> > 
> Sure, and that's much appreciated! :-)
> 
> > If it is working I'd really prefer it over the current situation.
> > 
> Right. I've got to leave now. But I'll produce some zombies on
> Monday,
> and will see if they move. :-D
> 
Here you go:

http://pastebin.com/r93TGCZU

Is that "vm1 -b-" --> "(null) ---" domain zombie enough?

If yes, as you can see, it moves to cpupool0 while being destroyed, and
I can destroy the pool without problems.

I also shutdown the system with the domain still there (in cpupool0),
and it works.

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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