Andrew, there's one more fallout of the dyntick queue: the fix below
goes after (or into) dynticks-core-nmi-watchdog-fix.patch. The bug only
affected NO_HZ kernels.
Ingo
----------------->
Subject: dynticks: core, NMI watchdog fix, #2
From: Ingo Molnar <[email protected]>
a partial fix of the NMI watchdog bug sneaked into yesterday night's
queue - this patch removes that extra in_interrupt() condition.
(One effect of this bug is a 'slow' serial console on NO_HZ, because we
never update jiffies and the serial console's timeouts get confused by
it.)
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
---
kernel/softirq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux/kernel/softirq.c
===================================================================
--- linux.orig/kernel/softirq.c
+++ linux/kernel/softirq.c
@@ -280,7 +280,7 @@ void irq_enter(void)
{
__irq_enter();
#ifdef CONFIG_NO_HZ
- if (idle_cpu(smp_processor_id()) && !in_interrupt())
+ if (idle_cpu(smp_processor_id()))
hrtimer_update_jiffies();
#endif
}
-
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