rcu: Add rcu_expedite_gp() and rcu_unexpedite_gp() to rcutorture (4bb3c5f4) · Commits · e / devices / android_kernel_oneplus_sm7250

kernel/rcu/rcutorture.c

+25 −0

Original line number	Diff line number	Diff line
		@@ -853,6 +853,8 @@ rcu_torture_fqs(void *arg)
		static int
		rcu_torture_writer(void *arg)
		{
		bool can_expedite = !rcu_gp_is_expedited();
		int expediting = 0;
		unsigned long gp_snap;
		bool gp_cond1 = gp_cond, gp_exp1 = gp_exp, gp_normal1 = gp_normal;
		bool gp_sync1 = gp_sync;
		@@ -865,6 +867,12 @@ rcu_torture_writer(void *arg)
		int nsynctypes = 0;

		VERBOSE_TOROUT_STRING("rcu_torture_writer task started");
		pr_alert("%s" TORTURE_FLAG
		" Grace periods expedited from boot/sysfs for %s,\n",
		torture_type, cur_ops->name);
		pr_alert("%s" TORTURE_FLAG
		" Testing of dynamic grace-period expediting diabled.\n",
		torture_type);

		/* Initialize synctype[] array. If none set, take default. */
		if (!gp_cond1 && !gp_exp1 && !gp_normal1 && !gp_sync)
		@@ -949,9 +957,26 @@ rcu_torture_writer(void *arg)
		}
		}
		rcutorture_record_progress(++rcu_torture_current_version);
		/* Cycle through nesting levels of rcu_expedite_gp() calls. */
		if (can_expedite &&
		!(torture_random(&rand) & 0xff & (!!expediting - 1))) {
		WARN_ON_ONCE(expediting == 0 && rcu_gp_is_expedited());
		if (expediting >= 0)
		rcu_expedite_gp();
		else
		rcu_unexpedite_gp();
		if (++expediting > 3)
		expediting = -expediting;
		}
		rcu_torture_writer_state = RTWS_STUTTER;
		stutter_wait("rcu_torture_writer");
		} while (!torture_must_stop());
		/* Reset expediting back to unexpedited. */
		if (expediting > 0)
		expediting = -expediting;
		while (can_expedite && expediting++ < 0)
		rcu_unexpedite_gp();
		WARN_ON_ONCE(can_expedite && rcu_gp_is_expedited());
		rcu_torture_writer_state = RTWS_STOPPING;
		torture_kthread_stopping("rcu_torture_writer");
		return 0;