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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
