On Mon, 19 Mar 2012, Andrea Arcangeli wrote: > Yeah I'll try to fix that but it's massively complex and frankly > benchmarking wise it won't help much fixing that... so it's beyond the > end of my todo list. Well a word of caution here: SGI tried to implement automatic migration schemes back in the 90's but they were never able to show a general benefit of migration. The overhead added because of auto migration often was not made up by true acceleration of the applications running on the system. They were able to tune the automatic migration to work on particular classes of applications but it never turned out to be generally advantageous. I wonder how we can verify that the automatic migration schemes are a real benefit to the application? We have a history of developing a kernel that decreases in performance as development proceeds. How can we make sure that these schemes are actually beneficial overall for all loads and do not cause regressions elsewhere? -- 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>