On Wed, 2011-06-15 at 18:45 +0200, Peter Zijlstra wrote: > On Wed, 2011-06-15 at 09:18 -0700, Andi Kleen wrote: > > > And in general it looks like blind conversion from spinlock to mutex > > is a bad idea right now. > > For 4 socket machines, maybe. On 2 sockets I cannot reproduce anything. > > I wonder if its the fairness thing, the mutex spinners aren't fifo fair > like the ticket locks are. It could be significant with larger socket > count since their cacheline arbitration is more sucky. > > > Peter, Wonder if you can provide the profile on your run so I can compare with what I got on 4 sockets? Thanks. Tim -- 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>