linux-kernel - [PATCH 12/12] timer: Lower base clock forwarding threshold

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Message-Id: <20200717140551.29076-13-frederic@kernel.org>
Date:   Fri, 17 Jul 2020 16:05:51 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Anna-Maria Behnsen <anna-maria@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>
Subject: [PATCH 12/12] timer: Lower base clock forwarding threshold

There is nothing that prevents us from forwarding the base clock if
it's one jiffy off. This reason for this arbitrary limit is historical
and doesn't seem to stand anymore.

Tested-by: Juri Lelli <juri.lelli@...hat.com>
Signed-off-by: Frederic Weisbecker <frederic@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Anna-Maria Behnsen <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 8b3fb52d8c47..77e21e98ec32 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -894,7 +894,7 @@ 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