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Date: Wed, 19 Jul 2006 21:35:02 -0700 (PDT)
From: John Polstra <jdp@polstra.com>
To: Alex Zbyslaw <xfb52@dial.pipex.com>
Cc: freebsd-hackers@freebsd.org
Subject: RE: [Fwd: Interrupts question]
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On 17-Jul-2006 Alex Zbyslaw wrote:
> I was monitoring a machine with "systat -vmstat" and noticed something
> about the interrupts and I don't know if it's a problem or not. If it
> is a problem, is there anything I can do about it?
> 
> The interrupts for the network interface (em0) on irq 64 exactly match
> those for a uhc device on irq 16.
> 
> And the interrupts for the hardware raid (amr) on irq 46 exactly match
> those for a uhc device on irq 18.

The problem involving the "em" device was solved in -current around
January by making the device use a fast interrupt handler.  If you
can update to the latest driver from -current (if it will build on
whatever version you are running), you can solve that part of the
problem.  I don't think there's an equivalent fix for the "amr"
driver, though.

John