Re: Obscure errors in dmsg, system instability

From: Doug White (dwhite_at_gumbysoft.com)
Date: 09/25/04

  • Next message: Doug White: "Re: How can I mount 2nd Hard disk (IDE)" 
    Date: Sat, 25 Sep 2004 13:29:24 -0700 (PDT)
To: Eirik Øverby <ltning@anduin.net>

    On Thu, 23 Sep 2004, [ISO-8859-1] Eirik Øverby wrote:

    > On 23. Sep 2004, at 04:15, Doug White wrote:
    >
    > > Is something sharing an interrupt with that device?
    > >
    > > PCI bus errors are generally Bad News .. either some device or the
    > > mobo is inroducing errors.
    >
    > Well.. Yes, there is some interrupt sharing. Relevant parts of dmsg:
    >
    > [ltning@carnen] ~$ dmesg | grep "irq 2"
    > IOAPIC #0 intpin 19 -> irq 2
    > uhci0: <Intel 82371AB/EB (PIIX4) USB controller> port 0xd400-0xd41f irq
    > 2 at device 4.2 on pci0
    > ahc0: <Adaptec aic7890/91 Ultra2 SCSI adapter> port 0xd000-0xd0ff mem
    > 0xe2000000-0xe2000fff irq 2 at device 6.0 on pci0
    > amr0: <LSILogic MegaRAID> mem 0xe3000000-0xe300ffff irq 2 at device 9.1
    > on pci0

    Apparently one of these devices doesn't like getting an interrupt when
    there's no data pending. It might be a FreeBSD driver bug, but being a
    3-way share it'll make it hard to untangle.

    > I don't like the fact that the LSI and the Adaptec are sharing IRQs,
    > given that the LSI is the main system drive controller (which is why I
    > don't use the Adaptec at all - and it cannot be disabled in BIOS I
    > think!)...
    >
    > I should perhaps try to reallocate some of the IRQs, but I don't really
    > have a clue how to do that, since I have no VGA in that box.. Ohwell, I
    > guess I just have to rip it open ;)

    Yah .. rearrange the cards in the slots and see what you can convince it
    to do. 

    -- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org
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  • Next message: Doug White: "Re: How can I mount 2nd Hard disk (IDE)"

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