Re: [Xen-devel] Re: ATA driver failures with pvops dom0,

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

On 11/22/2010 01:55 PM, Konrad Rzeszutek Wilk wrote:
> On Mon, Nov 22, 2010 at 04:46:46PM -0500, micah anderson wrote:
>> On Mon, 22 Nov 2010 11:28:29 -0500, Konrad Rzeszutek Wilk 
>> <konrad.wilk@xxxxxxxxxx> wrote:
>>>> [   16.572048] scsi0 : Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev 3.0
>>>> [   16.572051]         <Adaptec AIC7902 Ultra320 SCSI adapter>
>>>> [   16.572053]         aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 
>>>> 101-133MHz, 512 SCBs
>>>> [   16.572598] aic79xx 0000:03:02.1: found PCI INT B -> IRQ 5
>>> That is a rather odd IRQ number that is shared amongst all of the devices. 
>>> Is there
>>> a "OS Compatibility" BIOS option where you can select Linux?
>> I'm intending to have the BIOS queried at the earliest convenient
>> time. Its not near me so I can't get this information right away, but I
>> will.
> Take your time. I've a full plate of bugs to deal with :-(
>>> So MA Young found an interesting issue where the IRQs below 16 don't get 
>>> programmed
>>> correctly, which was fixed in .. some unstable version, but before we go 
>>> that route
>>> 1) Go in the serial console and hit Ctrl-A, hit '?' and hit '*' and send the
>>> output. I am curious to see if the IO-APIC ends up having a proper vector 
>>> as during
>>> bootup it looks to be set to nothing but it should have by now have a good 
>>> value.
>> Ok, here it is:
> .. snip ..
>> (XEN)    IRQ:   5 affinity:00000000,00000000,00000000,00000001 vec:38 
>> type=IO-APIC-edge    status=00000010 in-flight=0 domain-list=0:  5(-S--),
> So it thinks it is an edge, but if that IRQ is shared it has to be level. You 
> have
> a really weird motherboard..

I found this... interesting:

> (XEN) init IO_APIC IRQs
> (XEN)  IO-APIC (apicid-pin) 2-0, 2-10, 2-11, 2-17, 2-20, 2-21, 2-22, 2-23, 
> 3-0, 3-1, 3-2, 3-3, 3-6, 3-7, 3-8, 3-9, 3-10, 3-11, 3-12, 3-13, 3-14, 3-15, 
> 3-16, 3-17, 3-18, 3-19, 3-20, 3-21, 3-22, 3-23, 4-1, 4-2, 4-3, 4-4, 4-5, 4-8, 
> 4-9, 4-10, 4-11, 4-12, 4-13, 4-14, 4-15, 4-16, 4-17, 4-18, 4-19, 4-20, 4-21, 
> 4-22, 4-23 not connected.

No idea what it means, but I'd guess its the BIOS doing something screwy.

    J

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