From 8fffde8f06288077bf919394b00c213de898370b Mon Sep 17 00:00:00 2001
From: Guillaume Chazarain <guichaz@yahoo.fr>
Date: Fri, 25 Jan 2008 21:08:34 +0100
Subject: [PATCH] --- yaml --- r: 76195 b: refs/heads/master c:
 cc203d2422004498909c4886d1b94a2e388d973e h: refs/heads/master i:   76193:
 34d2ab98b383d7790f0af5bad56b8b22c2c9f77a   76191:
 01ec8dc86eb89a7c6d700b5424b26ea7e1adb244 v: v3

---
 [refs]                     | 2 +-
 trunk/kernel/sched.c       | 6 ++++--
 trunk/kernel/sched_debug.c | 1 +
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 20327608cceb..b90d18b6b6f7 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 782daeee3d596282bfee4cd9e976c86be0e194a8
+refs/heads/master: cc203d2422004498909c4886d1b94a2e388d973e
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
index 3995d1679858..4d3a5a700866 100644
--- a/trunk/kernel/sched.c
+++ b/trunk/kernel/sched.c
@@ -465,7 +465,7 @@ struct rq {
 	u64 clock, prev_clock_raw;
 	s64 clock_max_delta;
 
-	unsigned int clock_warps, clock_overflows;
+	unsigned int clock_warps, clock_overflows, clock_underflows;
 	u64 idle_clock;
 	unsigned int clock_deep_idle_events;
 	u64 tick_timestamp;
@@ -3736,8 +3736,10 @@ void scheduler_tick(void)
 	/*
 	 * Let rq->clock advance by at least TICK_NSEC:
 	 */
-	if (unlikely(rq->clock < next_tick))
+	if (unlikely(rq->clock < next_tick)) {
 		rq->clock = next_tick;
+		rq->clock_underflows++;
+	}
 	rq->tick_timestamp = rq->clock;
 	update_cpu_load(rq);
 	curr->sched_class->task_tick(rq, curr, 0);
diff --git a/trunk/kernel/sched_debug.c b/trunk/kernel/sched_debug.c
index 80fbbfc04290..9e5de098d471 100644
--- a/trunk/kernel/sched_debug.c
+++ b/trunk/kernel/sched_debug.c
@@ -179,6 +179,7 @@ static void print_cpu(struct seq_file *m, int cpu)
 	PN(prev_clock_raw);
 	P(clock_warps);
 	P(clock_overflows);
+	P(clock_underflows);
 	P(clock_deep_idle_events);
 	PN(clock_max_delta);
 	P(cpu_load[0]);