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authorJohannes Weiner <hannes@saeurebad.de>2008-06-27 15:07:21 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-30 15:03:08 +0200
commitdd7a1e5615b1719c0fdffee1ea5a7820ac8141a6 (patch)
treeeecc48d905d53ee4e8b71cb2b88c0651c76922a4 /kernel
parent8d5be7f4e8515af461cbc8f07687ccc81507d508 (diff)
downloadop-kernel-dev-dd7a1e5615b1719c0fdffee1ea5a7820ac8141a6.zip
op-kernel-dev-dd7a1e5615b1719c0fdffee1ea5a7820ac8141a6.tar.gz
softlockup: fix watchdog task wakeup frequency
Updating the timestamp more often is pointless as we print the warnings only if we exceed the threshold. And the check for hung tasks relies on the last timestamp, so it will keep working correctly, too. Signed-off-by: Johannes Weiner <hannes@saeurebad.de> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/softlockup.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 97977ec..d53ab70 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -130,8 +130,11 @@ void softlockup_tick(void)
now = get_timestamp(this_cpu);
- /* Wake up the high-prio watchdog task every second: */
- if (now > (touch_timestamp + 1))
+ /*
+ * Wake up the high-prio watchdog task twice per
+ * threshold timespan.
+ */
+ if (now > touch_timestamp + softlockup_thresh/2)
wake_up_process(per_cpu(watchdog_task, this_cpu));
/* Warn about unreasonable delays: */
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