Re: [Xen-devel] Xen-4.3 and -unstable regression from changeset "numa-sched: leave node-affinity alone if not in 'auto' mode"

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On gio, 2013-11-28 at 15:09 +0000, George Dunlap wrote:
> On 11/28/2013 12:31 PM, Andrew Cooper wrote:
> Do you have a xen-syms you can use to find out what line the crash 
> happened at?
> 
Yep, that would be helpful...

> Dom0 should have auto_node_affinity set at this point; so before this 
> patch you'd have:
>   nodemask = NODEMASK_MASK_NONE;
>   [set nodes in nodemask from cpumask]
>   d->node_affinity=nodemask
> 
> After, you have:
>   nodes_clear(d->node_affinity)
>   [set nodes in d->node_affinity from cpumask]
> 
> Everything looks like it should be the same.
> 
Exactly! I really don't see what could be happening.

Anyway, I've now access to the machine and can try doing some
debugging...

> Can you try just reverting what's in the positive side of the if()? 
> I.e., adding back in nodemask=NODE_MASK_NONE at the top, and the 
> nodemask copying, and see what happens?
> 
...Including this, and let you know.

Regards,
Dario

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

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