SCHED_ULE + SMP Phenom freeze [SOLVED]

[Michal Varga]

Just a quick success report - kern/120138 does indeed solve the Phenom
X3 SCHED_ULE problem.

Attached patch against recent -STABLE in case someone else runs into
it in the near future:


--- sys/kern/sched_ule.c.orig	2008-12-08 05:07:30.000000000 +0100
+++ sys/kern/sched_ule.c	2009-03-11 00:09:43.000000000 +0100
@@ -1399,7 +1399,7 @@
 	 * prevents excess thrashing on large machines and excess idle on
 	 * smaller machines.
 	 */
-	steal_thresh = min(ffs(mp_ncpus) - 1, 4);
+	steal_thresh = min(fls(mp_ncpus) - 1, 4);
 	affinity = SCHED_AFFINITY_DEFAULT;
 #endif
 }