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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>
This commit is contained in:
Paul E. McKenney 2017-06-06 12:52:44 -07:00
parent 85ef2bd2a5
commit 5e741fa9e9
1 changed files with 3 additions and 1 deletions
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4
kernel/rcu/rcutorture.c
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@ -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"
};