Re: [PATCH] 2.5: conditional schedules with a preemptive kernel

[Linus Torvalds]

On 20 Feb 2002, Robert Love wrote:
> 
> With a preemptive kernel, explicit conditional schedules when
> preempt_count is zero are a waste of cycles and code size.

Hmm.. Are there any other kind?

Another way of saying this: how can a conditional schedule _ever_ be 
nothing but a waste of cycles and code size with preemption enabled?

If the reason is the BKL, then I would much prefer those paths to be 
BKL-fixed, than have two different conditional schedules.

In short, I'd rather get a patch that just unconditionally makes the 
conditional schedules no-ops with preemption enabled. That would seem to 
make a lot more sense.

		Linus