rcu: Move end of special early-boot RCU operation earlier

Ingo was getting warnings from rcu_scheduler_starting() indicating that context switches had occurred before RCU ended its special early-boot handling of grace periods. This is a dangerous condition, as it indicates that RCU might have prematurely ended grace periods. This exploratory fix moves rcu_scheduler_starting() earlier in boot. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
mrcsosa · Sep 4, 2009 · 7db905e · 7db905e
1 parent 29e2035
commit 7db905e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/init/main.c b/init/main.c
@@ -451,6 +451,7 @@ static noinline void __init_refok rest_init(void)
 {
 	int pid;
 
+	rcu_scheduler_starting();
 	kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);
 	numa_default_policy();
 	pid = kernel_thread(kthreadd, NULL, CLONE_FS | CLONE_FILES);
@@ -462,7 +463,6 @@ static noinline void __init_refok rest_init(void)
 	 * at least once to get things moving:
 	 */
 	init_idle_bootup_task(current);
-	rcu_scheduler_starting();
 	preempt_enable_no_resched();
 	schedule();
 	preempt_disable();