Re: Preempt? (was Re: Cannot enable DMA on SATA drive (SCSI-libsata,VIA SATA))

[Jeff Garzik]

Nick Piggin wrote:
> When you say low latency, you mean small lock hold times, *and*
> cond_rescheds placed everywhere - it is this second requirement
> that isn't the cleanest way of doign things.
>
> With preempt, sure you still need small lock hold times. No big
> deal.

And with preempt you're still hiding stuff that needs fixing.  And when 
it gets fixed, you don't need preempt.

Therefore, preempt is just a hack that hides stuff that wants fixing anyway.

	Jeff



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