Re: [PATCH v2 1/5] mm: add numa node symlink for memory section insysfs

[David Rientjes]

On Tue, 27 Oct 2009, Alex Chiang wrote:

> Thank you for ACKing, David.
> 
> S390 guys, I cc'ed you on this patch because I heard a rumour
> that your memory sections may belong to more than one NUMA node?
> Is that true? If so, how would you like me to handle that
> situation?
> 

You're referring to how unregister_mem_sect_under_nodes() should be 
handled, right?  register_mem_sect_under_node() already looks supported by 
your patch.

Since the unregister function includes a plural "nodes," I assume that 
it's possible for hotplug to register a memory section to more than one 
node.  That's probably lacking on x86 currently, however, because we lack 
node hotplug.

I'd suggest a similiar iteration through pfn's that the register function 
does checking for multiple nodes and then removing the link from all 
applicable node_devices kobj when unregistering.

Maybe one of the s390 maintainers will test that?
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