linux-kernel - [PATCH tip/core/rcu 29/55] rcutorture: Add diagnostic for unscheduled system shutdown

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Date:	Mon, 17 Feb 2014 14:12:33 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
	josh@...htriplett.org, niv@...ibm.com, tglx@...utronix.de,
	peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com,
	edumazet@...gle.com, darren@...art.com, fweisbec@...il.com,
	oleg@...hat.com, sbw@....edu,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 29/55] rcutorture: Add diagnostic for unscheduled system shutdown

From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>

Currently, rcutorture can terminate via rmmod, via self-shutdown,
via something else shutting the system down, or of course the usual
catastrophic termination.  The first two get flagged, so this commit adds
a message for the third.  For the fourth, your warranty is void as always.

Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 kernel/torture.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/torture.c b/kernel/torture.c
index ed360cf948da..d51de3029a5c 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -438,10 +438,12 @@ static int torture_shutdown_notify(struct notifier_block *unused1,
 				   unsigned long unused2, void *unused3)
 {
 	mutex_lock(&fullstop_mutex);
-	if (fullstop == FULLSTOP_DONTSTOP)
+	if (fullstop == FULLSTOP_DONTSTOP) {
+		VERBOSE_TOROUT_STRING("Unscheduled system shutdown detected");
 		fullstop = FULLSTOP_SHUTDOWN;
-	else
+	} else {
 		pr_warn("Concurrent rmmod and shutdown illegal!\n");
+	}
 	mutex_unlock(&fullstop_mutex);
 	return NOTIFY_DONE;
 }
-- 
1.8.1.5

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