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Subject[tip:timers/core] hrtimer: Make the statistics fields smaller
Commit-ID:  a6ffebce7f89f6f97cc22838a5d4383b15d6774f
Gitweb: http://git.kernel.org/tip/a6ffebce7f89f6f97cc22838a5d4383b15d6774f
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 14 Apr 2015 21:08:34 +0000
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 22 Apr 2015 17:06:49 +0200

hrtimer: Make the statistics fields smaller

No point in having usigned long for /proc/timer_list statistics. Make
them unsigned int.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Preeti U Murthy <preeti@linux.vnet.ibm.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/20150414203500.959773467@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
include/linux/hrtimer.h | 8 ++++----
kernel/time/hrtimer.c | 4 ++--
kernel/time/timer_list.c | 2 +-
3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index 8025156..d39f284 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -187,10 +187,10 @@ struct hrtimer_cpu_base {
int in_hrtirq;
int hres_active;
int hang_detected;
- unsigned long nr_events;
- unsigned long nr_retries;
- unsigned long nr_hangs;
- ktime_t max_hang_time;
+ unsigned int nr_events;
+ unsigned int nr_retries;
+ unsigned int nr_hangs;
+ unsigned int max_hang_time;
#endif
struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES];
};
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 73131da..874e091 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -1327,8 +1327,8 @@ retry:
cpu_base->hang_detected = 1;
raw_spin_unlock(&cpu_base->lock);
delta = ktime_sub(now, entry_time);
- if (delta.tv64 > cpu_base->max_hang_time.tv64)
- cpu_base->max_hang_time = delta;
+ if ((unsigned int)delta.tv64 > cpu_base->max_hang_time)
+ cpu_base->max_hang_time = (unsigned int) delta.tv64;
/*
* Limit it to a sensible value as we enforce a longer
* delay. Give the CPU at least 100ms to catch up.
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index bdd5e98..6232fc5 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -165,7 +165,7 @@ static void print_cpu(struct seq_file *m, int cpu, u64 now)
P(nr_events);
P(nr_retries);
P(nr_hangs);
- P_ns(max_hang_time);
+ P(max_hang_time);
#endif
#undef P
#undef P_ns

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