linux-kernel - [RFC PATCH 10/10] timer: Lower base clock forwarding threshold

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Message-Id: <20200701011030.14324-11-frederic@kernel.org>
Date:   Wed,  1 Jul 2020 03:10:30 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Anna-Maria Gleixner <anna-maria@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>
Subject: [RFC PATCH 10/10] timer: Lower base clock forwarding threshold

There is no apparent reason for not forwarding base->clk when it's 2
jiffies late, except perhaps for past optimizations. But since forwarding
has to be done at some point now anyway, this doesn't stand anymore.

Signed-off-by: Frederic Weisbecker <frederic@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Anna-Maria Gleixner <anna-maria@...utronix.de>
Cc: Juri Lelli <juri.lelli@...hat.com>
---
 kernel/time/timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 439fee098e76..25a55c043297 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -883,7 +883,7 @@ static inline void forward_timer_base(struct timer_base *base)
 	 * Also while executing timers, base->clk is 1 offset ahead
 	 * of jiffies to avoid endless requeuing to current jffies.
 	 */
-	if ((long)(jnow - base->clk) < 2)
+	if ((long)(jnow - base->clk) < 1)
 		return;
 
 	/*
-- 
2.26.2