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

Hugh Dickins (hugh@veritas.com)
Mon, 15 Apr 2002 21:50:12 +0100 (BST)

Messages sorted by: [ date ][ thread ][ subject ][ author ]
Next message: Linus Torvalds: "Re: [PATCH] for_each_zone / for_each_pgdat"
Previous message: Andrew Morton: "Re: [patch] writeback daemons"
In reply to: Robert Love: "[PATCH] 2.5: don't miss a preemption"

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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Next message: Linus Torvalds: "Re: [PATCH] for_each_zone / for_each_pgdat"
Previous message: Andrew Morton: "Re: [patch] writeback daemons"
In reply to: Robert Love: "[PATCH] 2.5: don't miss a preemption"