Messages in this thread | | | Subject | Re: [PATCH] NMI request/release | From | Robert Love <> | Date | 22 Oct 2002 14:16:21 -0400 |
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On Tue, 2002-10-22 at 14:08, Corey Minyard wrote:
> In 2.5.44, stock from kernel.org, rcu_process_callbacks() calls > local_irq_disable(). Is that just preemption disabling, now?
No, but rcu_process_callbacks() is for the copy update part.
Look at rcu_read_lock() and rcu_read_unlock()... those are the read paths.
Of course, I can be very wrong about some of this, RCU grosses^Wconfuses me. But the read paths do just seem to call rcu_read_lock/unlock which just do a preempt_disable/enable. Otherwise the read path is entirely transparent.
Robert Love
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