Re: new IRQ scalability changes in 2.3.48

From: Andrea Arcangeli (andrea@suse.de)
Date: Mon Mar 13 2000 - 18:08:42 EST


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



This archive was generated by hypermail 2b29 : Wed Mar 15 2000 - 21:00:33 EST