On Mon, Jun 06, 2016 at 03:48:35PM -0400, Johannes Weiner wrote: > Noting a reference on an active file page but still deactivating it > represents a smaller cost of reclaim than noting a referenced > anonymous page and actually physically rotating it back to the head. > The file page *might* refault later on, but it's definite progress > toward freeing pages, whereas rotating the anonymous page costs us > real time without making progress toward the reclaim goal. > > Don't treat both events as equal. The following patch will hook up LRU > balancing to cache and swap refaults, which are a much more concrete > cost signal for reclaiming one list over the other. Remove the > maybe-IO cost bias from page references, and only note the CPU cost > for actual rotations that prevent the pages from getting reclaimed. > > Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx> Acked-by: Minchan Kim <minchan@xxxxxxxxxx> -- 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>