On Wed, 18 Jan 2012 08:08:01 +0900 Minchan Kim <minchan@xxxxxxxxxx> wrote: > > > > > > > > 2. can't we measure page-in/page-out distance by recording something ? > > > > > > I can't understand your point. What's relation does it with swapout prevent? > > > > > > > If distance between pageout -> pagein is short, it means thrashing. > > For example, recoding the timestamp when the page(mapping, index) was > > paged-out, and check it at page-in. > > Our goal is prevent swapout. When we found thrashing, it's too late. > If you want to prevent swap-out, don't swapon any. That's all. Then, you can check the number of FILE_CACHE and have threshold. Thanks, -Kame -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>