On Wed, Jun 24, 2015 at 05:50:28PM -0500, Nathan Zimmer wrote: > My apologies for taking so long to get back to this. > > I think I did locate two potential sources of slowdown. > One is the set_cpus_allowed_ptr as I have noted previously. > However I only notice that on the very largest boxes. > I did cobble together a patch that seems to help. > If you are using kthread_create_on_node(), is it even necessary to call set_cpus_allowed_ptr() at all? -- Mel Gorman SUSE Labs -- 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>