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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
