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Date: Sun, 05 Nov 2006 09:21:17 -0800 (PST)
From: John Polstra <jdp@polstra.com>
To: Tai-hwa Liang <avatar@mmlab.cse.yzu.edu.tw>
Cc: freebsd-current@freebsd.org
Subject: Re: Silly IRQ allocation on Dell 1950
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On 05-Nov-2006 Tai-hwa Liang wrote:
>    Though not bce related, same here on an old Tyan Tiger MPX board:
> 
># vmstat -i
> interrupt                          total       rate
> irq1: atkbd0                        4584          0
> irq6: fdc0                             9          0
> irq14: ata0                     10540911         21
> irq15: ata1                     10540714         21
> irq17: fxp0                     85976410        175
> irq19: fxp1 xl0+               161770331        330 <-----
> cpu0: timer                     97988242        200
> cpu1: timer                     97988235        200
> Total                          464809436        948
> 
>    I've tried to move the two fxp cards to different PCI slots but still got
> the same result: one of them seems to "love" the onboard xl0. ;)
> 
>    Swapping one of the fxp with a rl could be a workaround.  But to replace
> fxp with rl?  Hmm...

Replacing the fxp with a different card wouldn't change the IRQs.
All PCI cards use the INTA signal for their primary interrupt.  So
an rl card would behave the same as an fxp card in that respect.

John