raise_softirq is called every timer interrupt in run_local_timers(), which causes a thread wakeup to happen every timer interrupt. This happens in !CONFIG_PREEMPT_SOFTIRQS, which means the wakeup is most likely not needed. In addition it also fouls calc_load() since it's, agian, observing at least one thread running on every invocation. Signed-off-by: Daniel Walker --- kernel/softirq.c | 2 ++ 1 file changed, 2 insertions(+) Index: linux-2.6.22/kernel/softirq.c =================================================================== --- linux-2.6.22.orig/kernel/softirq.c +++ linux-2.6.22/kernel/softirq.c @@ -508,7 +508,9 @@ inline fastcall void raise_softirq_irqof { __do_raise_softirq_irqoff(nr); +#ifdef CONFIG_PREEMPT_SOFTIRQS wakeup_softirqd(nr); +#endif } EXPORT_SYMBOL(raise_softirq_irqoff); -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/