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| author | Thomas Gleixner <tglx@linutronix.de> | 2007-02-19 18:12:05 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-19 14:18:43 -0800 |
| commit | bc5393a6c9c0e70b4b43fb2fb63e3315e9a15c8f (patch) | |
| tree | 7fe069bfde8bef8381bead946e42036e8a325e5a /kernel | |
| parent | 6ba9b346e1e0eca65ec589d32de3a9fe32dc5de6 (diff) | |
| download | lwn-bc5393a6c9c0e70b4b43fb2fb63e3315e9a15c8f.tar.gz lwn-bc5393a6c9c0e70b4b43fb2fb63e3315e9a15c8f.zip | |
[PATCH] NOHZ: Produce debug output instead of a BUG()
The BUG_ON() in tick_nohz_stop_sched_tick() triggers on some boxen.
Remove the BUG_ON and print information about the pending softirq
to allow better debugging of the problem.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/tick-sched.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 9234e44fc94a..512a4a906467 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -165,7 +165,9 @@ void tick_nohz_stop_sched_tick(void) goto end; cpu = smp_processor_id(); - BUG_ON(local_softirq_pending()); + if (unlikely(local_softirq_pending())) + printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n", + local_softirq_pending()); now = ktime_get(); /* |