On Mon, Apr 27, 2015 at 04:23:39PM +0900, Joonsoo Kim wrote: > When we steal whole pageblock, we don't need to break highest order > freepage. Perhaps, there is small order freepage so we can use it. > The reason why the largest block is taken is to reduce the probability there will be another fallback event in the near future. Early on, there were a lot of tests conducted to measure the number of external fragmenting events and take steps to reduce them. Stealing the largest highest order freepage was one of those steps. -- 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>