Re: [PATCH] 2.5: don't miss a preemption

From: Hugh Dickins (hugh@veritas.com)
Date: Mon Apr 15 2002 - 15:50:12 EST

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On 15 Apr 2002, Robert Love wrote:
>
> This patch checks for need_resched in preempt_schedule after setting
> preempt_count back to zero, before returning. The overhead is
> negligible and it is crucial to never miss a preemption opportunity.

I'm curious: why is it crucial to never miss a preemption opportunity?

Hugh

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