On Thu, Apr 11, 2013 at 09:14:19AM +0900, Kamezawa Hiroyuki wrote: > > > >nr[lru] at the end there is pages remaining to be scanned not pages > >scanned already. > > yes. > > >Did you mean something like this? > > > >nr[lru] = scantarget[lru] * percentage / 100 - (scantarget[lru] - nr[lru]) > > > > For clarification, this "percentage" means the ratio of remaining scan target > of > another LRU. So, *scanned* percentage is "100 - percentage", right ? >
Yes, correct. > If I understand the changelog correctly, you'd like to keep > > scantarget[anon] : scantarget[file] > == really_scanned_num[anon] : really_scanned_num[file] > Yes. > even if we stop scanning in the middle of scantarget. And you introduced > "percentage" > to make sure that both scantarget should be done in the same ratio. > Yes. > So...another lru should scan scantarget[x] * (100 - percentage)/100 in total. > > nr[lru] = scantarget[lru] * (100 - percentage)/100 - (scantarget[lru] - > nr[lru]) > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > ^^^^^^^^^^^^^^^^^^^^^^^^^ > proportionally adjusted scan target already scanned num > > = nr[lru] - scantarget[lru] * percentage/100. > Yes, you are completely correct. This preserves the original ratio of anon:file scanning properly. -- 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/
