Re: cerberus errors on 2.4.19 (ide dma related)

From: Ed Sweetman (
Date: Sun Aug 18 2002 - 13:11:46 EST

On Sun, 2002-08-18 at 05:19, Andre Hedrick wrote:
> 2.4.19-preempt
> All bets are off because who knows what preempt is doing to the state
> machines and in PIO you are dead.
> You can not delay transaction of data between interrupts w/o having the
> transport help out. But the preempt don't get it.
> If you push your request size down to 8k or to a page you preempt problems
> will go away, only because granularity of requests. And the price is
> performance goes in the tank. But this is preempt so who cares.

OK, that makes some sense, at least more than removing devfs. I'll not
compile in preempt and test to see if the problem still occurs. As
soon as i figure out how to not use devfs i'll try it without that too.

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