On Wed, 14 Jun 2006, Mel Gorman wrote: > No, it hasn't. It's really a NUMA thing and there are a number of > important restrictions as far as hotremove is concerned. No, page migration is not only a NUMA thing, and yes there are still restrictions but there is code in Andrews tree to relax some of them. The migrate_pages() function is designed to migrate between arbitrary lists of pages (or using a allocation function(mm)). You can use that in the non NUMA case without a problem (Hugh Dickins did that to test the page migration on SMP as far as I can tell). It was designed after all by keeping the needs of memory hotplug in mind.
