Date: Mon, 14 Aug 2000 01:00:03 -0700 (PDT) From: Johan Karlsson <k@numeri.campus.luth.se> To: freebsd-doc@freebsd.org Subject: Re: kern/17774: stray irq7 Message-ID: <200008140800.BAA18924@freefall.freebsd.org>
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The following reply was made to PR kern/17774; it has been noted by GNATS.
From: Johan Karlsson <k@numeri.campus.luth.se>
To: Bruce Evans <bde@zeta.org.au>
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: kern/17774: stray irq7
Date: Mon, 14 Aug 2000 09:58:19 +0200
At Sun, 13 Aug 2000 22:52:53 +1000, Bruce Evans wrote:
> Frequently Wrong Answers.
That is why I thought it was the correct answer :-)
> > Should the print of this text be removed from kernel then?
> =
> Either that or turned into a KASSERT panic or something that annoys
> developers enough to fix the problem. (The irq7 and irq15 handlers
> need extra code which is hard to fit into the macros used to generate
> the code. This may be easier when the code is rewritten for SMPng.)
If you think this should be done please go ahead and change it.
In the mean time I think a FAQ entry should exists.
-doc people, please check grammar and such since I'm not nativ :-)
I have tried to merge Bruce's answer and any error is =
probably mine.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Q: What does 'stray irq' mean?
A: Stray IRQs are indications of hardware IRQ glitches, mostly =
from hardware that removes its interrupt request in the middle =
of the interrupt request acknowledge cycle.
One has three alternatives how to deal with this:
1) Live with the warnings. All except the first 5 per irq =
are suppressed anyway.
2) Break the warnings by changing 5 to 0 in isa_strayintr() =
so that all the warnings are suppressed.
3) Break the warnings by installing parallel port hardware =
that uses irq 7 and the ppp driver for it (this happens =
on most systems), and install an ide drive or other =
hardware that uses irq 15 and a suitable driver for it.
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Thanks
Johan K
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