Re: APIC problem or 3com 3c590 driver problem in smp kernel 2.4.x

[Feng Xian]

It's our own's card. so it could be the card's problem. does the pci
device have to do some special thing to support APIC? my card won't work
properly on uni-processor with APIC enable kernel or smp kernel when the
card is sharing IRQ with some other pci devices.

Alex

On Fri, 1 Jun 2001, Ingo Oeser wrote:

> On Thu, May 31, 2001 at 12:27:07PM -0400, Feng Xian wrote:
> > The driver for my pci device, I have the SA_SHIRQ set.
>
> What kind of PCI device do you have? I had this problem once with
> an PCI-Matchmaker[1] based board (for which we still have the wrong
> PCI-ID btw, but my patch was rejected twice...).
>
> > Actually what I am thinking it may be APIC support problem. I rebuild my
> > kernel to use single cpu without APIC support, my device and 3c905 both
> > work fine. they don't work for SMP kernel (APIC is by default enabled)
> > Then I configured my uni-processor kernel to enable the APIC support, my
> > device won't work with the 3c905, just exactly same as it behaves in the
> > SMP kernel.
>
> With 2.2 I also had this without APIC.
>
> I have been flooded with interrupts which have been intended for
> the Cyclone card (3c905B 100BaseTX), and exited the ISR quickly
> after querying the interrupt register of my Matchmaker board
> without any ACKing, but the Cyclone never got these interrupts
> anymore.
>
> But is doesn't seem to be a 3c905 based problem, as I have
>
>  11:   95772726          XT-PIC  es1371, eth0, eth1
>
> in /proc/interrupts where eth0 and eth1 are both Cyclones.
> Even the vga card has IRQ 11 assigned.
>
> So this is not really unknown ;-)
>
> Regards
>
> Ingo Oeser
>
> [1] class 0b40, vendor id: 10e8, device id: 807d
>

-- 
        Feng Xian
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           ALEX