rcutorture: Allow for rcupdate.rcu_normal (9efafb88) · Commits · 戴 / test

Currently, rcu_torture_writer() checks only for rcu_gp_is_expedited() when deciding whether or not to do dynamic control of RCU expediting. This means that if rcupdate.rcu_normal is specified, rcu_torture_writer() will attempt to dynamically control RCU expediting, but will nonetheless only test normal RCU grace periods. This commit therefore adds a check for !rcu_gp_is_normal(), and prints a message and desists from testing dynamic control of RCU expediting when doing so is futile. Signed-off-by:

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

kernel/rcu/rcutorture.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -916,7 +916,7 @@ rcu_torture_fqs(void *arg)
		static int
		rcu_torture_writer(void *arg)
		{
		bool can_expedite = !rcu_gp_is_expedited();
		bool can_expedite = !rcu_gp_is_expedited() && !rcu_gp_is_normal();
		int expediting = 0;
		unsigned long gp_snap;
		bool gp_cond1 = gp_cond, gp_exp1 = gp_exp, gp_normal1 = gp_normal;
		@@ -932,7 +932,7 @@ rcu_torture_writer(void *arg)
		VERBOSE_TOROUT_STRING("rcu_torture_writer task started");
		if (!can_expedite) {
		pr_alert("%s" TORTURE_FLAG
		" Grace periods expedited from boot/sysfs for %s,\n",
		" GP expediting controlled from boot/sysfs for %s,\n",
		torture_type, cur_ops->name);
		pr_alert("%s" TORTURE_FLAG
		" Disabled dynamic grace-period expediting.\n",

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