OK, I have bisected this problem to the following change: commit 8dc85d547285668e509f86c177bcd4ea055bcaaf Author: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Date: Thu Sep 2 16:50:03 2010 +0200 perf: Multiple task contexts Provide the infrastructure for multiple task contexts. -- To unsubscribe from this list: send the line "unsubscribe trinity" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html