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DateFri, 18 Mar 2005 04:56:41 -0800
SubjectRe: Real-Time Preemption and RCU
FromBill Huey (hui) <>
On Thu, Mar 17, 2005 at 04:20:26PM -0800, Paul E. McKenney wrote:
> 5. Scalability -and- Realtime Response.
...

> 	void
> 	rcu_read_lock(void)
> 	{
> 		preempt_disable();
> 		if (current->rcu_read_lock_nesting++ == 0) {
> 			current->rcu_read_lock_ptr =
> 				&__get_cpu_var(rcu_data).lock;
> 			read_lock(current->rcu_read_lock_ptr);
> 		}
> 		preempt_enable();
> 	}

Ok, here's a rather unsure question...

Uh, is that a sleep violation if that is exclusively held since it
can block within an atomic critical section (deadlock) ?

bill


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