Re: [RFC Patch V1 07/30] mm: Use cpu_to_mem()/numa_mem_id() to support memoryless node

On Fri, 11 Jul 2014, Tejun Heo wrote:

> On Fri, Jul 11, 2014 at 12:29:30PM -0500, Christoph Lameter wrote:
> > GFP_THISNODE is mostly used by allocators that need memory from specific
> > nodes. The use of numa_mem_id() there is useful because one will not
> > get any memory at all when attempting to allocate from a memoryless
> > node using GFP_THISNODE.
>
> As long as it's in allocator proper, it doesn't matter all that much
> but the changes are clearly not contained, are they?

Well there is a proliferation of memory allocators recently. NUMA is often
a second thought in those.

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