From owner-freebsd-current  Mon Sep 21 09:49:01 1998
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To: Roger Hardiman <roger@cs.strath.ac.uk>
cc: current@FreeBSD.ORG, multimedia@FreeBSD.ORG, templin@erg.sri.com
Subject: Re: wd0 / bt848 causing IDE timeouts 
In-reply-to: Your message of "Mon, 21 Sep 1998 14:16:42 BST."
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Date: Mon, 21 Sep 1998 09:45:55 -0700
From: "Fred L. Templin" <templin@erg.sri.com>
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Roger,

> I think it is possible the bt848 driver is causing lots of interrupts
> when there is not a TV signal but there is lots of noise.
> Would excessive IRQs (say 100 a second) cause the IDE to timeout?

I would think it more likely that you're spending too much time in the
interrupt service routine per individual interrupt while blocking other
device interrupts. Look for long-duration DELAYs, and verify whether your
spl*()'s are setting a higher priority than necessary.

Regards,

Fred
templin@erg.sri.com


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