Re: [PATCH 01/14] NUMA: Generic management of nodemasks for various purposes

[Christoph Lameter <clameter@sgi.com>]

On Wed, 1 Aug 2007, Lee Schermerhorn wrote:

> I think Andrew is referring to the "exclude selected nodes from
> interleave policy" and "preferred policy fixups" patches.  Those are
> related to the memoryless node patches in the sense that they touch some
> of the same lines in mempolicy.c.  However, IMO, those patches shouldn't
> gate the memoryless node series once the i386 issues are resolved.

Right. I think we first need to get the basic set straight. In order to be 
complete we need to audit all uses of node_online() in the kernel and 
think about those uses. They may require either N_NORMAL_MEMORY or 
N_HIGH_MEMORY depending on the check being for a page cache or a kernel 
allocation.

Then we need to test on esoteric NUMA systems like NUMAQ and embedded.

On the way we may add some additional stuff like interleave policy 
settings, restricting node use for hugh pages and slab etc. 
All of these are likely going to be important for asymmetric NUMA 
configurations that the memoryless_nodes patchset is going to address.



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