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    SubjectRe: APIC errors and aic7xxx interrupts w/SMP on 2.3.25
    On Wed, Nov 10, 1999 at 06:25:28PM +0900, kumon@flab.fujitsu.co.jp wrote:

    > kumon@flab.fujitsu.co.jp writes:
    > > Thanks Doug,
    > > Your information suggests me to investigate USB devices.
    > >
    > > Doug Ledford writes:
    > > > This most likely means something besides the aic7xxx is making that
    > > > interrupt but as sson as the aic7xxx is loaded and that interrupt is
    > > > enabled then the other device (whatever it may be, check the output of
    > > > lspci to see if anything else is sharing that interrupt) is likely making
    > > > all those interrupts and that's what needs fixed.
    >
    > My guess is not true.
    >
    > The result of /proc/interrupts and lspci are attached at the tail.
    >
    > IRQ19 is shared by aic7xxx and Vortex Aureal sound chip.
    > Even if the sound card is removed, massive interrupts exist.

    This may not be related to the BIOS at all... I remember there were some
    problems when Ingo was developing his APIC cleanup patches that caused
    this problem to show up as well. I remember some posts a while ago about
    some IRQs having millions of interrupts very quickly, and it went away in
    later versions of Ingo's SMP patches (I think). :)

    Maybe I'm not remembering correctly, but I think this is the case.

    Simon-

    [ Stormix Technologies Inc. ][ NetNation Communcations Inc. ]
    [ sim@stormix.com ][ sim@netnation.com ]
    [ Opinions expressed are not necessarily those of my employers. ]

    ---

    > My BOIS was set to use MPS-1.4. But if I changed it to use MPS-1.1,
    > the interrupts disappeared.
    >
    > As Harold suggested that:
    > > There is a known problem with USB on the BP6 if you have the bios
    > >set to MPS v1.4. I would make sure that you have the bios set to MPS v1.1.
    >
    > It may be the case.
    >
    > In this experiment, I used the latest bios 'BP6 LP BIOS+HPT366 beta
    > BIOS v1.21', released several day ago.
    >
    > Even if I use MPS-1.4 setting, Linux booting messages said "MPS 1.1",
    > what's curious.
    >
    >
    > I added /proc/interrupts and slightly edited 'lspci -v' output for
    > (un)informative data.
    >
    > ----------
    > using MPS 1.4
    > ----------
    > /proc/interrupts:
    > CPU0 CPU1
    > 0: 143984 144876 IO-APIC-edge timer
    > 1: 160 144 IO-APIC-edge keyboard
    > 2: 0 0 XT-PIC cascade
    > 5: 0 0 IO-APIC-edge uhci
    > 9: 0 0 IO-APIC-edge acpi
    > 12: 0 0 IO-APIC-edge PS/2 Mouse
    > 13: 1 0 XT-PIC fpu
    > 14: 1733 1763 IO-APIC-edge ide0
    > 15: 8 2 IO-APIC-edge ide1
    > 16: 0 0 IO-APIC-level eth0
    > 18: 20 25 IO-APIC-level aic7xxx
    > 19: 48385152 48385308 IO-APIC-level aic7xxx
    > NMI: 288803 288803
    > LOC: 288761 288772
    > ERR: 0
    > ---
    > IRQ and PCI relation by 'lspci -v'
    > 5: 00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
    > 16: 00:0f.0 Ethernet controller: 3Com Corporation 3c905 100BaseTX [Boomerang]
    > 16: 01:00.0 VGA compatible controller: Nvidia Corporation Riva TNT 128 (rev 04)
    > 17: 00:0d.0 Serial controller: Rockwell International HCF 56k V90 FaxModem (rev 01)
    > 18: 00:0b.0 SCSI storage controller: Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (rev 03)
    > 18: 00:13.0 Unknown mass storage controller: Triones Technologies, Inc.: Unknown device 0004 (rev 01)
    > 18: 00:13.1 Unknown mass storage controller: Triones Technologies, Inc.: Unknown device 0004 (rev 01)
    > 19: 00:09.0 Multimedia audio controller: Aureal Semiconductor Vortex 2 (rev fe)
    > 19: 00:0b.1 SCSI storage controller: Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (rev 03)
    >
    > ----------
    > MPS 1.1
    > ----------
    > /proc/interrupts:
    > CPU0 CPU1
    > 0: 2642 3168 IO-APIC-edge timer
    > 1: 66 76 IO-APIC-edge keyboard
    > 2: 0 0 XT-PIC cascade
    > 5: 46 43 IO-APIC-level uhci, aic7xxx
    > 9: 0 0 IO-APIC-edge acpi
    > 10: 0 0 IO-APIC-level eth0
    > 11: 23 22 IO-APIC-level aic7xxx
    > 12: 0 0 IO-APIC-level PS/2 Mouse
    > 13: 1 0 XT-PIC fpu
    > 14: 1438 1690 IO-APIC-edge ide0
    > 15: 7 3 IO-APIC-edge ide1
    > NMI: 5753 5753
    > LOC: 5723 5736
    > ERR: 0
    > ---
    > IRQ and PCI relation by 'lspci -v '
    > 5: 00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
    > 5: 00:09.0 Multimedia audio controller: Aureal Semiconductor Vortex 2 (rev fe)
    > 5: 00:0b.1 SCSI storage controller: Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (rev 03)
    > 10: 00:0f.0 Ethernet controller: 3Com Corporation 3c905 100BaseTX [Boomerang]
    > 10: 01:00.0 VGA compatible controller: Nvidia Corporation Riva TNT 128 (rev 04)
    > 11: 00:0b.0 SCSI storage controller: Adaptec AHA-2940U/UW / AHA-39xx / AIC-7895 (rev 03)
    > 11: 00:13.0 Unknown mass storage controller: Triones Technologies, Inc.: Unknown device 0004 (rev 01)
    > 11: 00:13.1 Unknown mass storage controller: Triones Technologies, Inc.: Unknown device 0004 (rev 01)
    > 12: 00:0d.0 Serial controller: Rockwell International HCF 56k V90 FaxModem (rev 01)
    >
    > --
    > Computer Systems Laboratory, Fujitsu Labs.
    > kumon@flab.fujitsu.co.jp
    >
    > -
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