On Thu, 2012-06-28 at 18:20 +0200, Peter Zijlstra wrote: > Now the switch_mm should imply the same cache+TBL flush we'd otherwise > do, and I'd think that that would be the majority of the cost. Am I > wrong there? The advantage of doing this is that you don't need any of the batching and possibly multiple invalidate nonsense you otherwise need. So it might still be an over-all win, even if the switch is slightly more expensive than a regular flush. Simply because you can avoid most (if not all) the usual complexities. -- 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