Messages in this thread | | | Date | Mon, 3 Nov 2003 09:04:09 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: interrupts across PCI bridge(s) not handled |
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On Mon, 3 Nov 2003, Charles Martin wrote: > > I have a pci backplane extender, with 4 cards > (named piraq) in it. The cards are detected by > the PCI system, and irqs 92-95 are assigned, > as shown in /var/log/messages: > > kernel: PCI->APIC IRQ transform: (B6,I4,P0) -> 93 > kernel: PCI->APIC IRQ transform: (B6,I6,P0) -> 95 > kernel: PCI->APIC IRQ transform: (B6,I7,P0) -> 92 > kernel: PCI->APIC IRQ transform: (B6,I9,P0) -> 94
Can you enable APIC_DEBUG debugging in "include/asm-i386/apic.h", and make sure that you build the kernel with a big printk buffer. Then, in case your distribution comes with a broken "dmesg" binary that doesn't show more than about 20kB of data, compile this trivial program and run it after bootup, and send the whole log out..
It would be a pity to have to boot with "noapic", since this is exactly the kind of situation where you _want_ the extra interrupts.
Linus
- stupid-dmesg.c - #include <sys/klog.h>
int main(int argc, char **argv) { static char buffer[128*1024]; int i;
i = klogctl(3, buffer, sizeof(buffer)); if (i > 0) write(1, buffer, i); }
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