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authorFeng Tang <feng.tang@intel.com>2009-09-03 16:32:53 +0800
committerThomas Gleixner <tglx@linutronix.de>2009-11-20 11:25:48 +0100
commit8629ea2eaba8ca0de2e38ce1b4a825e16255976e (patch)
tree8a4f16c0cdd069c808993e4701ca45590b35c611
parent8747d793fc5c4d3e4decd41d55f6dc24498dd5f5 (diff)
hrtimer: Fix /proc/timer_list regression
commit 507e1231 (timer stats: Optimize by adding quick check to avoid function calls) introduced a regression in /proc/timer_list. /proc/timer_list shows now #0: <c27d46b0>, tick_sched_timer, S:01, <(null)>, /-1 instead of #0: <c27d46b0>, tick_sched_timer, S:01, hrtimer_start, swapper/0 Revert the hrtimer quick check for now. The optimization needs more thought, but this is neither 2.6.32-rc7 nor stable material. [ tglx: - Removed unrelated changes from the original patch - Prevent unneccesary call to timer_stats_update_stats - massaged the changelog ] Signed-off-by: Feng Tang <feng.tang@intel.com> LKML-Reference: <alpine.LFD.2.00.0911181933540.24119@localhost.localdomain> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: stable@kernel.org Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--include/linux/hrtimer.h4
1 files changed, 1 insertions, 3 deletions
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index ff037f0b1b4..9bace4b9f4f 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -446,7 +446,7 @@ extern void timer_stats_update_stats(void *timer, pid_t pid, void *startf,
static inline void timer_stats_account_hrtimer(struct hrtimer *timer)
{
- if (likely(!timer->start_site))
+ if (likely(!timer_stats_active))
return;
timer_stats_update_stats(timer, timer->start_pid, timer->start_site,
timer->function, timer->start_comm, 0);
@@ -457,8 +457,6 @@ extern void __timer_stats_hrtimer_set_start_info(struct hrtimer *timer,
static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
{
- if (likely(!timer_stats_active))
- return;
__timer_stats_hrtimer_set_start_info(timer, __builtin_return_address(0));
}