From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Thu, 18 Aug 2011 16:30:32 +0000 (-0700)
Subject: rcu: Make rcu_torture_boost() exit loops at end of test
X-Git-Tag: next-20110829~18^2~4
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1bc68bd0cfa66b82d006a3482771558f42b88919;p=karo-tx-linux.git

rcu: Make rcu_torture_boost() exit loops at end of test

One of the loops in rcu_torture_boost() fails to check kthread_should_stop(),
and thus might be slowing or even stopping completion of rcutorture tests
at rmmod time.  This commit adds the kthread_should_stop() check to the
offending loop.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index eb739c03c143..76fe8936c32e 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -779,7 +779,8 @@ static int rcu_torture_boost(void *arg)
 		 * interval.  Besides, we are running at RT priority,
 		 * so delays should be relatively rare.
 		 */
-		while (oldstarttime == boost_starttime) {
+		while (oldstarttime == boost_starttime &&
+		       !kthread_should_stop()) {
 			if (mutex_trylock(&boost_mutex)) {
 				boost_starttime = jiffies +
 						  test_boost_interval * HZ;