rcutorture: Enable SRCU readers from timer handler (5e741fa9) · Commits · 戴 / test

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>

kernel/rcu/rcutorture.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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"
		};

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