[RFC PATCH v2 1/2] powerpc: numa: enable USE_PERCPU_NUMA_NODE_ID

Nishanth Aravamudan nacc at linux.vnet.ibm.com
Wed May 28 10:09:58 EST 2014

On 28.05.2014 [09:56:14 +1000], Benjamin Herrenschmidt wrote:
> On Tue, 2014-05-27 at 16:44 -0700, Nishanth Aravamudan wrote:
> > > Signed-off-by: Nishanth Aravamudan <nacc at linux.vnet.ibm.com>
> > 
> > Ping on this and patch 2/2. Ben, would you be willing to pull these
> > into
> > your -next branch so they'd get some testing?
> > 
> > http://patchwork.ozlabs.org/patch/350368/
> > http://patchwork.ozlabs.org/patch/349838/
> > 
> > Without any further changes, these two help quite a bit with the slab
> > consumption on CONFIG_SLUB kernels when memoryless nodes are present.
> I don't mind at all :-) I haven't really been following that story
> so I was waiting for the dust to settle and maybe acks from MM people
> but if you tell me they are good I'm prepared to trust you.

The patches themselves are pretty minimal and similar to the ia64
changes (and the affected code seems like it hasn't changed in some
time, beyond in the common code). I'd mostly like to get some
broad-range build & boot testing.

Also, is NUMA a sufficient symbol to depend, you think? I figure most of
the PPC NUMA systems are the pSeries/IBM variety, which is where I've
run into memoryless nodes in the first place.


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