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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-06-06 12:52:44 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-07-24 16:04:11 -0700
commit5e741fa9e9698f4010bb85eff252186f7a4071f4 (patch)
treec7b07c1434d2edd09705c037d93db8658921bf02 /kernel/rcu
parent85ef2bd2a561055f3b1cab634f67b734034eb984 (diff)
downloadlwn-5e741fa9e9698f4010bb85eff252186f7a4071f4.tar.gz
lwn-5e741fa9e9698f4010bb85eff252186f7a4071f4.zip
rcutorture: Enable SRCU readers from timer handler
Now that it is legal to invoke srcu_read_lock() and srcu_read_unlock() for a given srcu_struct from both process context and {soft,}irq handlers, it is time to test it. This commit therefore enables testing of SRCU readers from rcutorture's timer handler, using in_task() to determine whether or not it is safe to sleep in the SRCU read-side critical sections. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
-rw-r--r--kernel/rcu/rcutorture.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index aedc8f2ad955..8d59c82bec0b 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -522,7 +522,7 @@ static void srcu_read_delay(struct torture_random_state *rrsp)
delay = torture_random(rrsp) %
(nrealreaders * 2 * longdelay * uspertick);
- if (!delay)
+ if (!delay && in_task())
schedule_timeout_interruptible(longdelay);
else
rcu_read_delay(rrsp);
@@ -583,6 +583,7 @@ static struct rcu_torture_ops srcu_ops = {
.call = srcu_torture_call,
.cb_barrier = srcu_torture_barrier,
.stats = srcu_torture_stats,
+ .irq_capable = 1,
.name = "srcu"
};
@@ -615,6 +616,7 @@ static struct rcu_torture_ops srcud_ops = {
.call = srcu_torture_call,
.cb_barrier = srcu_torture_barrier,
.stats = srcu_torture_stats,
+ .irq_capable = 1,
.name = "srcud"
};