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SubjectRe: new IRQ scalability changes in 2.3.48
On Mon, 13 Mar 2000, Jamie Lokier wrote:

>Note: In many cases, spinlock_irqsave doesn't need to do the
>spinlock_depth thing on UP. [..]

It doesn't need that in SMP either.

>[..] However, not all cases: the code in the
>lock region might wake up another task.

If you wakeup another task you don't risk to get rescheduled before you
drop the lock.

Andrea


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