linux-kernel - [tip: core/rcu] rcuscale: Disable verbose torture-test output

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Message-ID: <161814861109.29796.8899087504876908130.tip-bot2@tip-bot2>
Date:   Sun, 11 Apr 2021 13:43:31 -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] rcuscale: Disable verbose torture-test output

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

Commit-ID:     0e7457b550233314394574c6bdc890de9131daf5
Gitweb:        https://git.kernel.org/tip/0e7457b550233314394574c6bdc890de9131daf5
Author:        Paul E. McKenney <paulmck@...nel.org>
AuthorDate:    Thu, 28 Jan 2021 10:15:02 -08:00
Committer:     Paul E. McKenney <paulmck@...nel.org>
CommitterDate: Mon, 08 Mar 2021 14:23:01 -08:00

rcuscale: Disable verbose torture-test output

Given large numbers of threads, the quantity of torture-test output is
sufficient to sometimes result in RCU CPU stall warnings.  The probability
of these stall warnings was greatly reduced by batching the output,
but the warnings were not eliminated.  However, the actual test only
depends on console output that is printed even when rcuscale.verbose=0.
This commit therefore causes this test to run with rcuscale.verbose=0.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh b/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
index 0333e9b..ffbe151 100644
--- a/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
+++ b/tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
@@ -12,5 +12,5 @@
 # Adds per-version torture-module parameters to kernels supporting them.
 per_version_boot_params () {
 	echo $1 rcuscale.shutdown=1 \
-		rcuscale.verbose=1
+		rcuscale.verbose=0
 }