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 [EMAIL PROTECTED]
> http://www.fi.muni.cz/~pem
> ---------------------------------------------------------------
>
Andre Hedrick
Linux ATA Development
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