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    SubjectRe: int. assignment on SMP + ServerWorks chipset

    There is a interrupt transaction delay imposed on all interrupts of 600ns
    spacing. It can be turned on/off but this may not help.

    Cheers,

    On Wed, 17 Jan 2001, Petr Matula wrote:

    > On Mon, Jan 15, 2001 at 08:49:56PM -0800, Linus Torvalds wrote:
    > > So what I _think_ is the correct change is to do roughly this in
    > > arch/i386/kernel/pci-irq.c:
    > >
    > > - in pcibios_fixup_irqs(), remove the
    > >
    > > #idef CONFIG_X86_IO_APIC
    > > ...
    > > #endif
    > >
    > > section entirely.
    > >
    > > - in pcibios_enable_irq(), at the _end_ (after having enabled the irq
    > > with "pcibios_lookup_irq(dev, 1)", do something like
    > >
    > > irq = IO_APIC_get_PCI_irq_vector(dev->bus->number, PCI_SLOT(dev->devfn), pin);
    > > if (irq > 0)
    > > dev->irq = irq;
    > >
    > > and add a LOT of debug printk's, and enable DEBUG in pci-i386.h.
    >
    > I did the changes above to 2.4.0 source.
    > Kernel with these changes can't detect my SCSI drive. It prints these messages
    > in cycle:
    > SCSI host 0 abort (pid 0) timed out - resetting
    > SCSI host is being reset for host 0 channel 0
    > SCSI host 0 channel 0 reset (pid 0) timed out - trying harder
    > SCSI host is being reset for host 0 channel 0
    >
    > Same configuration without changes above detects SCSI drive without problem.
    > For completness, made changes are attached.
    >
    > Could anybody help?
    >
    > Petr
    >
    > ---------------------------------------------------------------
    > Petr Matula pem@fi.muni.cz
    > http://www.fi.muni.cz/~pem
    > ---------------------------------------------------------------
    >

    Andre Hedrick
    Linux ATA Development

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