Re: [RFC] sched: make callers check lock contention forcond_resched_lock()

[Peter Zijlstra]

On Thu, 2012-05-03 at 17:12 +0900, Takuya Yoshikawa wrote:
> 
> Although we can do that using spin_is_contended() and cond_resched(),
> changing cond_resched_lock() to satisfy such a need is another option.
> 
Yeah, not a pretty patch. Changing all cond_resched_lock() sites just to
change one and in such an ugly way too.

So what's the impact of making spin_needbreak() work for !PREEMPT?
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