On Wed, Jul 03, 2013 at 03:21:39PM +0100, Mel Gorman wrote: > Initial support for automatic NUMA balancing was unable to distinguish > between false shared versus private pages except by ignoring pages with an > elevated page_mapcount entirely. This patch kicks away the training wheels > as initial support for identifying shared/private pages is now in place. > Note that the patch still leaves shared, file-backed in VM_EXEC vmas in > place guessing that these are shared library pages. Migrating them are > likely to be of major benefit as generally the expectation would be that > these are read-shared between caches and that iTLB and iCache pressure is > generally low. This reminds me; there a clause in task_numa_work() that skips 'small' VMAs. I don't see the point of that. In fact; when using things like electric fence this might mean skipping most memory. -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>