[Xen-devel] Re: [FIXED] probs with 3ware Controller

[Nuno Silva <nuno.silva@xxxxxxxxxxxx>]

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Keir Fraser wrote:
| Aha, lazy programming bit me. So the bug was nothing to do with BIOS
| table parsing -- it was because the controllers's IRQ was greater than
| 63. :-)
|
| Xen should now correctly virtualise IRQs all the way up to 127.

Hi!

I don't know if it's something that can cause trouble in the future so
I'm posting it so that someone more fit to judge can decide:

puma:/home/nuno# cat /proc/interrupts
~           CPU0       CPU1
~  0:     419664     363307    IO-APIC-edge  timer
~  1:        945        699    IO-APIC-edge  i8042
~  7:          0          0    IO-APIC-edge  parport0
~  8:          4          0    IO-APIC-edge  rtc
~  9:          0          0   IO-APIC-level  acpi
~ 12:       9433       8376    IO-APIC-edge  i8042
~ 14:      38328      31705    IO-APIC-edge  ide0
~ 15:         27         24    IO-APIC-edge  ide1
169:      29959      23244   IO-APIC-level  uhci_hcd, uhci_hcd,
radeon@PCI:1:0:0
177:          3          5   IO-APIC-level  uhci_hcd, bttv0, bt878
185:          0          0   IO-APIC-level  libata, uhci_hcd
193:          3          0   IO-APIC-level  ehci_hcd
201:        338          0   IO-APIC-level  Intel ICH5
209:          0          0   IO-APIC-level  ivtv: iTVC15/16 mpg2 encoder
chip
217:       2609       2142   IO-APIC-level  SysKonnect SK-98xx, ohci1394
NMI:        220        209
LOC:     782792     782703
ERR:          0
MIS:          0

This is a "real" box (not xenolinux) and, as you can see, I have irq
lines up  to 217!

This is with MSI/MSI-X enabled in kernel 2.6.x... With MSI disabled the
irq lines stay under 24.

127 is too low or this MSI stuff doesn't matter in a xen environment?

Regards,
Nuno Silva

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