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From: "Darren Pilgrim" <dmp@bitfreak.org>
To: "'Brandon Fosdick'" <bfoz@bfoz.net>
Date: Sun, 14 Aug 2005 01:26:00 -0700
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Cc: stable@freebsd.org
Subject: RE: IRQ conflict between twa0 and skc0
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From: Brandon Fosdick [mailto:bfoz@bfoz.net]=20
>=20
> Darren Pilgrim wrote:
> > Try switching slots with the RAID and video cards.  It's silly, but=20
> > then so is PCI interrupt routing.
>=20
> Unbelievable. Who ever wrote the PCI spec should have been shot.

I believe the IEEE was involved. :)

> I switched the cards and now the network card is sharing an=20
> interrupt with the video card, but neither seems to mind.=20
> More importantly it isn't sharing with the raid card and they=20
> all appear to be happy.

IRQ sharing is a known issue with many RAID cards and even some gigabit
ethernet cards.  It seems to correlate to cards that push the
performance limit of the bus.