diff options
| author | Colin Ian King <colin.king@canonical.com> | 2010-03-19 10:28:02 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-01 15:58:47 -0700 |
| commit | 7b6c1753bc0ee455adf4f4ed489a367c7dc7c432 (patch) | |
| tree | 3d9b9b3f56bc8b36f2b081541522d7c920ee5e30 /kernel | |
| parent | 893b328f07c17aa84f562fc5566eb524bd76188e (diff) | |
softlockup: Stop spurious softlockup messages due to overflow
commit 8c2eb4805d422bdbf60ba00ff233c794d23c3c00 upstream.
Ensure additions on touch_ts do not overflow. This can occur
when the top 32 bits of the TSC reach 0xffffffff causing
additions to touch_ts to overflow and this in turn generates
spurious softlockup warnings.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
LKML-Reference: <1268994482.1798.6.camel@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/softlockup.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c index 81324d12eb35..d2080ad196fd 100644 --- a/kernel/softlockup.c +++ b/kernel/softlockup.c @@ -140,11 +140,11 @@ void softlockup_tick(void) * Wake up the high-prio watchdog task twice per * threshold timespan. */ - if (now > touch_timestamp + softlockup_thresh/2) + if (time_after(now - softlockup_thresh/2, touch_timestamp)) wake_up_process(per_cpu(watchdog_task, this_cpu)); /* Warn about unreasonable delays: */ - if (now <= (touch_timestamp + softlockup_thresh)) + if (time_before_eq(now - softlockup_thresh, touch_timestamp)) return; per_cpu(print_timestamp, this_cpu) = touch_timestamp; |