Re: [RFC PATCH] powerpc/numa: reset node_possible_map to only node_online_map

On Thu, Mar 05, 2015 at 05:08:04PM -0500, Tejun Heo wrote:

It can be argued that we should always stick to the online masks for
allocation and iteration; however, that usually requires more
complexity and the only cases where this mattered have been when the
boot code got it wrong and failed to set the possible masks correctly,
which also seems to be the case here.  I don't see any reason to
deviate here.

Hmm... but yeah, as you wrote, keeping the allocation local could be a
reason but let's please not do this just to reduce memory consumption.
If memory locality of the field affects performance noticeably, sure.

Thanks.

-- 
tejun