On Thu, Apr 11, 2013 at 08:57:54PM +0100, Mel Gorman wrote: > Currently kswapd queues dirty pages for writeback if scanning at an elevated > priority but the priority kswapd scans at is not related to the number > of unqueued dirty encountered. Since commit "mm: vmscan: Flatten kswapd > priority loop", the priority is related to the size of the LRU and the > zone watermark which is no indication as to whether kswapd should write > pages or not. > > This patch tracks if an excessive number of unqueued dirty pages are being > encountered at the end of the LRU. If so, it indicates that dirty pages > are being recycled before flusher threads can clean them and flags the > zone so that kswapd will start writing pages until the zone is balanced. > > Signed-off-by: Mel Gorman <mgorman@xxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> -- 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>