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Date:      Tue, 18 Jan 2000 20:55:00 -0500
From:      Coleman Kane <cokane@one.net>
To:        Mike Smith <msmith@freebsd.org>
Cc:        Phillip Salzman <phill@rumfish.corp.gulf.net>, stable@freebsd.org
Subject:   Re: Stray IRQs
Message-ID:  <20000118205500.A71226@evil.2y.net>
In-Reply-To: <200001182307.PAA03097@mass.cdrom.com>; from msmith@freebsd.org on Tue, Jan 18, 2000 at 06:04:37PM -0500
References:  <Pine.BSF.4.10.10001181539290.3301-100000@rumfish.corp.gulf.net> <200001182307.PAA03097@mass.cdrom.com>

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IRQ 15 is typically an interrupt for the second IDE controller. You may be using
SCSI and have disabled the wdc on a mobo that doesn't like that too much. The
network traffic blockage could be attributed to the PIC not being reset before
the requests were handled. IRQs 8-15 are handled by IRQ 2, mid you, so they are
higher priority if your netcard is on PIC1.
--cokane

Mike Smith had the audacity to say:
> > A mission-critical production machine of ours seems to be
> > having issues with stray irqs.
> > 
> > This is in the dmesg:
> > -----------------------------
> > stray irq 15
> > stray irq 15
> > stray irq 15
> > stray irq 15
> > stray irq 15
> > too many stray irq 15's; not logging any more
> > ----------------------------
> > 
> > It seems as if the ethernet traffic stops for about a minute
> > when it posts that message.
> > 
> > I've searched back in the mailing lists to find that this 
> > may be caused by the BIOS grabbing the IRQ -- and was just
> > wondering if anyone else has seen this problem lately?
> 
> No; this is typically caused by having hardware in the system that's 
> generating interrupts but isn't handled by a driver.  It may be 
> symptomatic of faulty hardware or a system misconfiguration.
> 
> -- 
> \\ Give a man a fish, and you feed him for a day. \\  Mike Smith
> \\ Tell him he should learn how to fish himself,  \\  msmith@freebsd.org
> \\ and he'll hate you for a lifetime.             \\  msmith@cdrom.com
> 
> 
> 
> 
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