Messages in this thread | | | Date | Thu, 15 May 2014 10:47:18 +0100 | From | Mel Gorman <> | Subject | Re: [RFC PATCH 0/3] Aggressively allocate the pages on cma reserved memory |
| |
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
| |