Re: NUMA policy issues with ZONE_MOVABLE

Mel Gorman
2007-07-27T08:20:46Z

On (26/07/07 18:22), Christoph Lameter didst pronounce:
> On Thu, 26 Jul 2007, Mel Gorman wrote:
>
> > Comments?
>
> Lets go with the unconditional filtering and get rid of some of the per
> node zonelists?

I would prefer to go with this for 2.6.23 and work on that for 2.6.24.
The patch should be relatively straight-forward (I'll work on it today)
but it would need wider testing than what I can do here, particularly on
the larger machines that needed things like zlcache.

> We could f.e. merge the lists for ZONE_MOVABLE and
> ZONE_base_of_zone_movable?

That will be fine for freelist management but a mess with respect to
reclaim. I'd rather not go down that rathole.

> That may increase the cacheability of the
> zonelists and reduce cache footprint.

That should be the case. I'll work on the patch today and see what sort
of results I get.

--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab