Re: aio stress panic on 2.6.11-mm1

From: Arjan van de Ven
Date: Wed Mar 09 2005 - 06:14:20 EST

On Wed, 2005-03-09 at 16:34 +0530, Suparna Bhattacharya wrote:
> Any sense of how costly it is to use spin_lock_irq's vs spin_lock
> (across different architectures) ? Isn't rwsem used very widely ?

oh also rwsems aren't used all that much simply because they are quite
more expensive than regular semaphores, so that you need a HUGE bias in
reader/writer ratio to make it even worth it...

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