[linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch

[Nick Piggin]

Scott Wood wrote:
> On Wed, Jul 21, 2004 at 09:32:46PM +1000, Nick Piggin wrote:
> 
>>What do you think about deferring softirqs just while in critical
>>sections?
>>
>>I'm not sure how well this works, and it is CONFIG_PREEMPT only
>>but in theory it should prevent unbounded softirqs while under
>>locks without taking the performance hit of doing the context
>>switch.
> 
> 
> You're still running do_softirq() with preemption disabled, which is
> almost as bad as doing it under a lock.
> 

do_softirq is only run a maximum of once with preemption disabled,
instead of an unbounded number of times.