linux-kernel - [tip: core/rcu] torture: Make refscale throttle high-rate printk()s

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Message-ID: <161313342878.23325.17600408859832508616.tip-bot2@tip-bot2>
Date:   Fri, 12 Feb 2021 12:37:08 -0000
From:   "tip-bot2 for Paul E. McKenney" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Paul E. McKenney" <paulmck@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: core/rcu] torture: Make refscale throttle high-rate printk()s

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

Commit-ID:     414c116e016584137118067f506125f6ace6128c
Gitweb:        https://git.kernel.org/tip/414c116e016584137118067f506125f6ace6128c
Author:        Paul E. McKenney <paulmck@...nel.org>
AuthorDate:    Wed, 25 Nov 2020 10:50:35 -08:00
Committer:     Paul E. McKenney <paulmck@...nel.org>
CommitterDate: Wed, 06 Jan 2021 17:17:20 -08:00

torture: Make refscale throttle high-rate printk()s

This commit adds a short delay for verbose_batched-throttled printk()s
to further decrease console flooding.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/rcu/refscale.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/rcu/refscale.c b/kernel/rcu/refscale.c
index 3da246f..02dd976 100644
--- a/kernel/rcu/refscale.c
+++ b/kernel/rcu/refscale.c
@@ -52,8 +52,10 @@ static atomic_t verbose_batch_ctr;
 do {											\
 	if (verbose &&									\
 	    (verbose_batched <= 0 ||							\
-	     !(atomic_inc_return(&verbose_batch_ctr) % verbose_batched)))		\
+	     !(atomic_inc_return(&verbose_batch_ctr) % verbose_batched))) {		\
+		schedule_timeout_uninterruptible(1);					\
 		pr_alert("%s" SCALE_FLAG s, scale_type, ## x);				\
+	}										\
 } while (0)
 
 #define VERBOSE_SCALEOUT_ERRSTRING(s, x...) \