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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2009-09-02 14:01:24 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-04 09:29:34 +0200 |
| commit | 7db905e636f08ea5bc9825c1f73d77802e8ccad5 (patch) | |
| tree | 1fc6699a3e7aa2ef73d4a70005f9e1e3e522079a /init | |
| parent | 29e2035bddecce3eb584a8304528b50da8370a24 (diff) | |
| download | op-kernel-dev-7db905e636f08ea5bc9825c1f73d77802e8ccad5.zip op-kernel-dev-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>
Diffstat (limited to 'init')
| -rw-r--r-- | init/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/init/main.c b/init/main.c index 11f4f14..525f6fb 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(); |
