linux-kernel - [tip: timers/core] timers: Lower base clock forwarding threshold

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 17 Jul 2020 20:00:14 -0000
From:   "tip-bot2 for Frederic Weisbecker" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Juri Lelli <juri.lelli@...hat.com>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: timers/core] timers: Lower base clock forwarding threshold

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     36cd28a4cdd05d47ccb62a2d86e8f37839cc879a
Gitweb:        https://git.kernel.org/tip/36cd28a4cdd05d47ccb62a2d86e8f37839cc879a
Author:        Frederic Weisbecker <frederic@...nel.org>
AuthorDate:    Fri, 17 Jul 2020 16:05:51 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 17 Jul 2020 21:55:25 +02:00

timers: Lower base clock forwarding threshold

There is nothing that prevents from forwarding the base clock if it's one
jiffy off. The reason for this arbitrary limit of two jiffies is historical
and does not longer exist.

Signed-off-by: Frederic Weisbecker <frederic@...nel.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Tested-by: Juri Lelli <juri.lelli@...hat.com>
Link: https://lkml.kernel.org/r/20200717140551.29076-13-frederic@kernel.org

---
 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 8b3fb52..77e21e9 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;
 
 	/*