Re: preempt-timing-2.6.8-rc1

William Lee Irwin III
2004-07-13T13:04:52Z

William Lee Irwin III wrote:
>> AFAICT this is nothing more than rounding up.

On Tue, Jul 13, 2004 at 10:57:54PM +1000, Nick Piggin wrote:
> But you want to round down by definition of preempt_thresh, don't you?
> preempt_thresh = 1ms = 1000000us
> ie. warn me if the lock hold goes _to or above_ 1000000us

The semantics I implemented are warning for strictly above the
preempt_thresh. Whether those semantics are ideal is irrelevant; it's
faithful to those semantics. Given that people are asking for sub-
millisecond latencies, maybe I should increase the precision.

-- wli