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 <dwalker@xxxxxxxxxx>
---
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);
--
-
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