Re: [Xen-devel] pv_ops dom0 USB fixed

["Andrew Lyon" <andrew.lyon@xxxxxxxxx>]

On Wed, Dec 10, 2008 at 9:03 PM, Andrew Lyon <andrew.lyon@xxxxxxxxx> wrote:
> On Wed, Dec 10, 2008 at 8:48 PM, Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>> Pasi Kärkkäinen wrote:
>>>
>>> On Wed, Dec 10, 2008 at 12:05:32PM -0800, Jeremy Fitzhardinge wrote:
>>>
>>>>
>>>> Ian Campbell noticed a missing TLB flush which was causing the USB
>>>> crashes/failures when booting the pvops dom0 kernel.  With that fixed,
>>>> enabling USB boots reliably and seems to work.
>>>>
>>>>
>>>
>>> Nice!
>>>
>>>
>>>>
>>>> Its quite possible this will also improve matters with ATA/SATA
>>>> controllers, though I haven't tested it so far.
>>>>
>>>> Anyway, its a significant fix and its worth trying the current pvops
>>>> patch queue again.  Please tell me what you find.
>>>>
>>>>
>
> Excellent news, I've tried the pv_ops dom0 kernel several times
> recently and had failure with usb and sata drivers, so fingers crossed
> it will work now.
>
> I will test tomorrow and report my results ;-)
>
> Andy
>
>>>
>>> Hmm.. against what kernel/tree are these patches?
>>>
>>
>> See the wiki ;)
>>
>>
>> Pull the kernel.org/hg/linux-2.6 tree, "hg update $(cat KERNEL_VERSION)",
>> then "hg qpush -a"
>>
>>   J
>>
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>

I downloaded the source a few mins ago and tried pv_ops dom0 on my
test system a dell optiplex 755, it doesnt get very far at all into
the boot process:

(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 64-bit, lsb, compat32
(XEN)  Dom0 kernel: 64-bit, PAE, lsb, paddr 0x200000 -> 0x8a0418
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   0000000120000000->0000000122000000 (951655 pages
to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: ffffffff80200000->ffffffff808a0418
(XEN)  Init. ramdisk: ffffffff808a1000->ffffffff808a1000
(XEN)  Phys-Mach map: ffffffff808a1000->ffffffff80ff3b38
(XEN)  Start info:    ffffffff80ff4000->ffffffff80ff44a4
(XEN)  Page tables:   ffffffff80ff5000->ffffffff81002000
(XEN)  Boot stack:    ffffffff81002000->ffffffff81003000
(XEN)  TOTAL:         ffffffff80000000->ffffffff81400000
(XEN)  ENTRY ADDRESS: ffffffff80765200
(XEN) Dom0 has maximum 2 VCPUs
(XEN) Scrubbing Free RAM: .done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch
input to Xen)
(XEN) Freed 108kB init memory.
mapping kernel into physical memory
Xen: setup ISA identity maps
about to get started...
(XEN) ioapic_guest_write: apic=0, pin=2, old_irq=0, new_irq=-1
(XEN) ioapic_guest_write: old_entry=000009f0, new_entry=00010900
(XEN) ioapic_guest_write: Attempt to remove IO-APIC pin of in-use IRQ!
(XEN) ioapic_guest_write: apic=0, pin=4, old_irq=4, new_irq=-1
(XEN) ioapic_guest_write: old_entry=000009f1, new_entry=00010900
(XEN) ioapic_guest_write: Attempt to remove IO-APIC pin of in-use IRQ!
(XEN) ioapic_guest_write: apic=0, pin=4, old_irq=4, new_irq=4
(XEN) ioapic_guest_write: old_entry=000009f1, new_entry=000189f1
(XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use IRQ!

And then hangs.

I tried adding pci=nomsi to the kernel arguments, didnt seem to make
much difference.

Andy

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