From: Michal Hocko <mhocko@xxxxxxxxxx> Date: Tue, 27 Oct 2015 13:26:47 +0100 > On Mon 26-10-15 12:56:19, Johannes Weiner wrote: > [...] >> Or any other combination of pick-and-choose consumers. But >> honestly, nowadays all our paths are lockless, and the counting is an >> atomic-add-return with a per-cpu batch cache. > > You are still hooking into hot paths and there are users who want to > squeeze every single cycle from the HW. Yeah, you're basically probably undoing a half year of work by another developer who was able to remove an atomic from these paths. -- 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>