On Wed, 7 Jan 2009, Peter Zijlstra wrote: > > Change mutex contention behaviour such that it will sometimes busy wait on > acquisition - moving its behaviour closer to that of spinlocks. Ok, this one looks _almost_ ok. The only problem is that I think you've lost the UP case. In UP, you shouldn't have the code to spin, and the "spin_or_schedule()" should fall back to just the schedule case. It migth also be worthwhile to try to not set the owner, and re-organize that a bit (by making it a inline function that sets the owner only for CONFIG_SMP or lockdep/debug). Linus -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
