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Date: Mon, 29 Nov 2004 11:49:22 +0100
From: Willem Jan Withagen <wjw@withagen.nl>
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To: Scott Long <scottl@freebsd.org>
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cc: stable@freebsd.org
Subject: Re: same interrupts on uhc and em0
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Scott Long wrote:
> Willem Jan Withagen wrote:
> 
>> Hi,
>>
>> Got this intel r1300 dual processor server with 2 Em inerfaces and a 
>> lot of usb ports, 2Gb and en Promise Fastrack TX2000
>>
>> Problem is that when em0 gets an interrupt, it also shows up on the 
>> USB controller. top shows the exact same amounts of interrupt at both 
>> every time over. Which has a lickelyhood of less than zero.
>>
>> Is this more common, and if so: what might fix it.
>>
>> --WjW
> 
> 
> This is a common problem, and unfortunately there hasn't been much 
> movement in fixing it.  I'd highly suggest disabling USB in the BIOS if
> you don't need it.

Aha, the axe method.... :)

Nope, it is a rack server with little use for USB. A rather nice one 
with video and USB at the front. But currently we're using the ps/2 kbd 
interface at the back, where there's also a video interface.

Out of curiosity:
	Are the ISR's really shared, or is it more an "optical" problem?
	em0 is at irq 30
	uhc is at irq 16
The server will be here for at most 1 more week, and is available for 
tests....

--WjW