aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2009-09-02 14:01:24 -0700
committerIngo Molnar <mingo@elte.hu>2009-09-04 09:29:34 +0200
commit7db905e636f08ea5bc9825c1f73d77802e8ccad5 (patch)
tree1fc6699a3e7aa2ef73d4a70005f9e1e3e522079a
parent29e2035bddecce3eb584a8304528b50da8370a24 (diff)
downloadlinux-linaro-stable-7db905e636f08ea5bc9825c1f73d77802e8ccad5.tar.gz
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 <mingo@elte.hu> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--init/main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/init/main.c b/init/main.c
index 11f4f145be3f..525f6fb2bd22 100644
--- 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();