linux-kernel - [PATCH rcu 2/5] scftorture: Shut down if nonsensical arguments given

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Message-Id: <20210915234141.3907301-2-paulmck@kernel.org>
Date:   Wed, 15 Sep 2021 16:41:38 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, akpm@...ux-foundation.org,
        mathieu.desnoyers@...icios.com, josh@...htriplett.org,
        tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
        dhowells@...hat.com, edumazet@...gle.com, fweisbec@...il.com,
        oleg@...hat.com, joel@...lfernandes.org,
        "Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH rcu 2/5] scftorture: Shut down if nonsensical arguments given

If (say) a 10-hour scftorture run is started, but the module parameters
are so nonsensical that the run doesn't even start, then scftorture will
wait the full ten hours when run built into a guest OS.  This commit
therefore shuts down the system in this case so that the error is reported
immediately instead of ten hours hence.

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

diff --git a/kernel/scftorture.c b/kernel/scftorture.c
index bc3f8e26345c..31b458b3b113 100644
--- a/kernel/scftorture.c
+++ b/kernel/scftorture.c
@@ -651,6 +651,10 @@ static int __init scf_torture_init(void)
 unwind:
 	torture_init_end();
 	scf_torture_cleanup();
+	if (shutdown_secs) {
+		WARN_ON(!IS_MODULE(CONFIG_SCF_TORTURE_TEST));
+		kernel_power_off();
+	}
 	return firsterr;
 }
 
-- 
2.31.1.189.g2e36527f23