On Tue, 10 May 2011 02:05:17 +0200 Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > > hm, which atomic ops are those? We shouldn't need buslocked operations > > on UP. > > Good point. I forgot they're patched out. > > Then it's likely somewhat slower, but I doubt it's a significant > slowdown. Essentially it's just a few more if ()s > And presumably some more instruction cachelines here and there. It'll be small, but 100*small == large. We can reduce the overhead to zero, it's a question of how ugly the end result is. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>