linux-kernel - [tip: timers/core] mm/damon/core: Use generic upper bound recommondation for usleep

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Message-ID: <172903208300.1442.6813676317012789457.tip-bot2@tip-bot2>
Date: Tue, 15 Oct 2024 22:41:23 -0000
From: "tip-bot2 for Anna-Maria Behnsen" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Anna-Maria Behnsen" <anna-maria@...utronix.de>,
 Thomas Gleixner <tglx@...utronix.de>, SeongJae Park <sj@...nel.org>,
 Frederic Weisbecker <frederic@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: timers/core] mm/damon/core: Use generic upper bound
 recommondation for usleep_range()

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

Commit-ID:     ef0245582e5bccd8b4c480a58bd4da91ee276397
Gitweb:        https://git.kernel.org/tip/ef0245582e5bccd8b4c480a58bd4da91ee276397
Author:        Anna-Maria Behnsen <anna-maria@...utronix.de>
AuthorDate:    Mon, 14 Oct 2024 10:22:25 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Wed, 16 Oct 2024 00:36:47 +02:00

mm/damon/core: Use generic upper bound recommondation for usleep_range()

The upper bound for usleep_range_idle() was taken from the outdated
documentation. As a recommondation for the upper bound of usleep_range()
depends on HZ configuration it is not possible to hard code it.

Use the define "USLEEP_RANGE_UPPER_BOUND" instead.

Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: SeongJae Park <sj@...nel.org>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
Link: https://lore.kernel.org/all/20241014-devel-anna-maria-b4-timers-flseep-v3-8-dc8b907cb62f@linutronix.de

---
 mm/damon/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/damon/core.c b/mm/damon/core.c
index c725c78..79efd80 100644
--- a/mm/damon/core.c
+++ b/mm/damon/core.c
@@ -1892,8 +1892,7 @@ static unsigned long damos_wmark_wait_us(struct damos *scheme)
 
 static void kdamond_usleep(unsigned long usecs)
 {
-	/* See Documentation/timers/timers-howto.rst for the thresholds */
-	if (usecs > 20 * USEC_PER_MSEC)
+	if (usecs >= USLEEP_RANGE_UPPER_BOUND)
 		schedule_timeout_idle(usecs_to_jiffies(usecs));
 	else
 		usleep_range_idle(usecs, usecs + 1);