On Fri, 18 Nov 2011, Shaohua Li wrote: > So can we make both interleave fairness and continuous allocation happy? Maybe. > Simplily we can adjust the round robin algorithm. We switch to another node > after several (N) allocation happens. If N isn't too big, we can still get > fair allocation. And we get N continuous pages. I use N=8 in below patch. > I thought 8 isn't too big for modern NUMA machine. Applications which use > interleave are unlikely run short time, so I thought fairness still works. People are already complaining that the 4k interleaving is too coarse. Bioses can often interleave on a cacheline level. A smaller size balances the load better over multiple nodes. Large sizes can result in imbalances since f.e. a whole array may end up on one node. Maybe make it tunable by expanding the numa_policy structure to include a size parameter? -- 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>