From 65bd77f554336407f5fd7ced7a6df686767fba21 Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@kernel.org>
Date: Thu, 23 Jul 2020 15:53:02 -0700
Subject: [PATCH] scftorture: Add cond_resched() to test loop
Although the test loop does randomly delay, which would provide quiescent
states and so forth, it is possible for there to be a series of long
smp_call_function*() handler runtimes with no delays, which results in
softlockup and RCU CPU stall warning messages. This commit therefore
inserts a cond_resched() into the main test loop.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/scftorture.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/scftorture.c b/kernel/scftorture.c
index fc22bcc9a589a..554a521ee235e 100644
--- a/kernel/scftorture.c
+++ b/kernel/scftorture.c
@@ -420,6 +420,7 @@ static int scftorture_invoker(void *arg)
set_cpus_allowed_ptr(current, cpumask_of(cpu));
was_offline = false;
}
+ cond_resched();
} while (!torture_must_stop());
VERBOSE_SCFTORTOUT("scftorture_invoker %d ended", scfp->cpu);
--
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