On Thu, May 15, 2014 at 11:10:55AM +0900, Joonsoo Kim wrote: > > That doesn't always prefer CMA region. It would be nice to > > understand why grouping in pageblock_nr_pages is beneficial. Also in > > your patch you decrement nr_try_cma for every 'order' allocation. Why ? > > pageblock_nr_pages is just magic value with no rationale. :) I'm not following this discussions closely but there is rational to that value -- it's the size of a huge page for that architecture. At the time the fragmentation avoidance was implemented this was the largest allocation size of interest. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>