On Wed, 17 Dec 2014, Joonsoo Kim wrote: > Ping... and I found another way to remove preempt_disable/enable > without complex changes. > > What we want to ensure is getting tid and kmem_cache_cpu > on the same cpu. We can achieve that goal with below condition loop. > > I ran Jesper's benchmark and saw 3~5% win in a fast-path loop over > kmem_cache_alloc+free in CONFIG_PREEMPT. > > 14.5 ns -> 13.8 ns > > See following patch. Good idea. How does this affect the !CONFIG_PREEMPT case? -- 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>