RE: PROBLEM: "drive appears confused" and "irq 18: nobody cared!"

["Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>]

We did a few experiments with assigning IRQ 14 and 15, and didn't get
anywhere. 
Then I asked Alexander for the MP routing table, and it became clear
that 14 and 15 are not wired on his system. 
Below is some information that we collected.
I am showing here the case when Alexander booted with acpi=off and no
MSI, to simplify the picture.
The interrupt routing according to MPS:
I/O APIC #2 Version 32 at 0xFEC00000.
Int: type 3, pol 0, trig 0, bus 5, IRQ 00, APIC ID 2, APIC INT 00 
Int: type 0, pol 0, trig 0, bus 5, IRQ 01, APIC ID 2, APIC INT 01 
Int: type 0, pol 0, trig 0, bus 5, IRQ 00, APIC ID 2, APIC INT 02 
Int: type 0, pol 0, trig 0, bus 5, IRQ 04, APIC ID 2, APIC INT 04
Int: type 0, pol 0, trig 0, bus 5, IRQ 06, APIC ID 2, APIC INT 06 
Int: type 0, pol 0, trig 0, bus 5, IRQ 07, APIC ID 2, APIC INT 07
Int: type 0, pol 1, trig 1, bus 5, IRQ 08, APIC ID 2, APIC INT 08 
Int: type 0, pol 0, trig 0, bus 5, IRQ 09, APIC ID 2, APIC INT 09  
Int: type 0, pol 0, trig 0, bus 5, IRQ 0a, APIC ID 2, APIC INT 0a  
Int: type 0, pol 0, trig 0, bus 5, IRQ 0c, APIC ID 2, APIC INT 0c 
Int: type 0, pol 0, trig 0, bus 5, IRQ 0d, APIC ID 2, APIC INT 0d 
Int: type 0, pol 3, trig 3, bus 0, IRQ 04, APIC ID 2, APIC INT 10
Int: type 0, pol 3, trig 3, bus 4, IRQ 00, APIC ID 2, APIC INT 10
Int: type 0, pol 3, trig 3, bus 0, IRQ 70, APIC ID 2, APIC INT 10
Int: type 0, pol 3, trig 3, bus 0, IRQ 71, APIC ID 2, APIC INT 11
Int: type 0, pol 3, trig 3, bus 0, IRQ 7c, APIC ID 2, APIC INT 12
Int: type 0, pol 3, trig 3, bus 0, IRQ 7d, APIC ID 2, APIC INT 13
Int: type 0, pol 3, trig 3, bus 0, IRQ 74, APIC ID 2, APIC INT 17
Int: type 0, pol 3, trig 3, bus 0, IRQ 75, APIC ID 2, APIC INT 13
Int: type 0, pol 3, trig 3, bus 0, IRQ 76, APIC ID 2, APIC INT 12
Int: type 0, pol 3, trig 3, bus 0, IRQ 77, APIC ID 2, APIC INT 10
Int: type 0, pol 3, trig 3, bus 0, IRQ 6c, APIC ID 2, APIC INT 10
Int: type 0, pol 3, trig 3, bus 1, IRQ 28, APIC ID 2, APIC INT 15
Int: type 0, pol 3, trig 3, bus 1, IRQ 24, APIC ID 2, APIC INT 11
Int: type 0, pol 3, trig 3, bus 1, IRQ 0c, APIC ID 2, APIC INT 15
Int: type 0, pol 3, trig 3, bus 2, IRQ 00, APIC ID 2, APIC INT 11
Int: type 0, pol 3, trig 3, bus 1, IRQ 18, APIC ID 2, APIC INT 10
Int: type 0, pol 3, trig 3, bus 1, IRQ 10, APIC ID 2, APIC INT 17 
 
           CPU0       
  0:     164179    IO-APIC-edge  timer
  1:        183    IO-APIC-edge  i8042
  2:          0          XT-PIC  cascade
  8:          0    IO-APIC-edge  rtc
 16:       2330   IO-APIC-level  skge, uhci_hcd:usb5, HDA Intel
 17:          3   IO-APIC-level  bttv0
 18:    4400000   IO-APIC-level  ide0, uhci_hcd:usb4
 19:       4824   IO-APIC-level  libata, uhci_hcd:usb3
 21:          3   IO-APIC-level  ohci1394, Ensoniq AudioPCI
 23:       1246   IO-APIC-level  ide2, ehci_hcd:usb1, uhci_hcd:usb2
NMI:        543 
LOC:     163040 
ERR:          0
MIS:          0

I am also attaching full trace.
Hope someone familiar with the chipset will be able to make sense out of
this data...

Thanks,
--Natalie

Attachment: syslog2613rc2patch-nomsi.bz2
Description: syslog2613rc2patch-nomsi.bz2