diff options
| author | Andrew Morton <akpm@linux-foundation.org> | 2008-03-19 17:01:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-03-19 18:53:37 -0700 |
| commit | 3150e63df41450a795bbd0bd98a8e70da74e0285 (patch) | |
| tree | cee77b25ba25abc5c892cfb06fdac92bbd946991 /kernel | |
| parent | cf821e8f53e3d147ebae03c8c710d2b8842d88a1 (diff) | |
| download | lwn-3150e63df41450a795bbd0bd98a8e70da74e0285.tar.gz lwn-3150e63df41450a795bbd0bd98a8e70da74e0285.zip | |
revert "clocksource: make clocksource watchdog cycle through online CPUs"
Revert commit 1ada5cba6a0318f90e45b38557e7b5206a9cba38 ("clocksource:
make clocksource watchdog cycle through online CPUs") due to the
regression reported by Gabriel C at
http://lkml.org/lkml/2008/2/24/281
(short vesion: it makes TSC be marked as always unstable on his
machine).
Cc: Andi Kleen <ak@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Robert Hancock <hancockr@shaw.ca>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Gabriel C <nix.or.die@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/clocksource.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 548c436a776b..278534bbca95 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -141,13 +141,8 @@ static void clocksource_watchdog(unsigned long data) } if (!list_empty(&watchdog_list)) { - /* Cycle through CPUs to check if the CPUs stay synchronized to - * each other. */ - int next_cpu = next_cpu(raw_smp_processor_id(), cpu_online_map); - if (next_cpu >= NR_CPUS) - next_cpu = first_cpu(cpu_online_map); - watchdog_timer.expires += WATCHDOG_INTERVAL; - add_timer_on(&watchdog_timer, next_cpu); + __mod_timer(&watchdog_timer, + watchdog_timer.expires + WATCHDOG_INTERVAL); } spin_unlock(&watchdog_lock); } @@ -169,7 +164,7 @@ static void clocksource_check_watchdog(struct clocksource *cs) if (!started && watchdog) { watchdog_last = watchdog->read(); watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL; - add_timer_on(&watchdog_timer, first_cpu(cpu_online_map)); + add_timer(&watchdog_timer); } } else { if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS) @@ -190,8 +185,7 @@ static void clocksource_check_watchdog(struct clocksource *cs) watchdog_last = watchdog->read(); watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL; - add_timer_on(&watchdog_timer, - first_cpu(cpu_online_map)); + add_timer(&watchdog_timer); } } } |