On Mon, 23 Aug 2010, Mel Gorman wrote: > > When the vm gets into a state where continual reclaim is necessary then > > the counters are not that frequently updated. If the machine is already > > slowing down due to reclaim then the vm can likely affort more frequent > > counter updates. > > > > Ok, but is that better than this patch? Decreasing the size of the window by > reducing the threshold still leaves a window. There is still a small amount > of drift by summing up all the deltas but you get a much more accurate count > at the point of time it was important to know. In order to make that decision we would need to know what deltas make a significant difference. Would be also important to know if there are any other counters that have issues. If so then the reduction of the thresholds is addressing these problems in a number of counters. I have no objection against this approach here but it may just be bandaid on a larger issue that could be approached in a cleaner way. -- 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>