On Thu, Aug 5, 2010 at 4:56 PM, KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> wrote: > /proc/vmstat already have both. > > cat /proc/vmstat |grep nr_dirty > cat /proc/vmstat |grep nr_writeback > > Also, /sys/devices/system/node/node0/meminfo show per-node stat. > > Perhaps, I'm missing your point. These only show the number of dirty pages present in the system at the point they are queried. The counter I am trying to add are increasing over time. They allow developers to see rates of pages being dirtied and entering writeback. Which is very helpful. mrubin -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>