[PATCH RFC tip/core/rcu 4/5] rcutorture: Suppress spurious RCU CPU stall warnings

["Paul E. McKenney" <paulmck@linux.vnet.ibm.com>]

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

Because rcutorture runs CPU-bound in the kernel, it can prevent grace
periods from being reported.  In RCU_COND_RESCHED_QS=y builds, the
cond_resched() calls handle this reporting.  This commit therefore
forces RCU_COND_RESCHED_QS=y for the TREE01 rcutorture configuration,
which is otherwise prone to spurious RCU CPU stall warnings.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Christoph Lameter <cl@gentwo.org>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
---
 tools/testing/selftests/rcutorture/configs/rcu/TREE01 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE01 b/tools/testing/selftests/rcutorture/configs/rcu/TREE01
index 9c827ec59a97..82e70bc38125 100644
--- a/tools/testing/selftests/rcutorture/configs/rcu/TREE01
+++ b/tools/testing/selftests/rcutorture/configs/rcu/TREE01
@@ -4,6 +4,7 @@ CONFIG_PREEMPT_NONE=n
 CONFIG_PREEMPT_VOLUNTARY=n
 CONFIG_PREEMPT=y
 #CHECK#CONFIG_TREE_PREEMPT_RCU=y
+CONFIG_RCU_COND_RESCHED_QS=y
 CONFIG_HZ_PERIODIC=n
 CONFIG_NO_HZ_IDLE=y
 CONFIG_NO_HZ_FULL=n
-- 
1.8.1.5