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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
parentsoftlockup: show irqtrace (diff)
downloadlinux-dd7a1e5615b1719c0fdffee1ea5a7820ac8141a6.tar.xz
linux-dd7a1e5615b1719c0fdffee1ea5a7820ac8141a6.zip
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>
-rw-r--r--kernel/softlockup.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 97977ecc3171..d53ab702a7db 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: */