Re: [Xen-devel] Xen cannot boot with pvops dom0

[Thomas DuBuisson <thomas.dubuisson@xxxxxxxxx>]

For what its worth, I've recently had significant issues building a
good pvops Dom0 kernel.  At first it wouldn't boot (kernel oops) then
it had an odd permission issue with /dev/pts/* that stopped xterm/bash
from working.

I went through the mud and found a configuration [1] that avoids
whatever issues I was hitting.  I thought about running a diff against
this and whatever the default was, but there would be lots of noise
due to many preference-specific changes (ex: built in all options
specifically matching my hardware).

Tom

[1] http://web.cecs.pdx.edu/~dubuisst/pvops_dom0.config

On Tue, Jun 30, 2009 at 7:43 PM, Han, Weidong<weidong.han@xxxxxxxxx> wrote:
> Jeremy Fitzhardinge wrote:
>> On 06/25/09 02:20, Han, Weidong wrote:
>>> I tried with latest Xen unstable (c/s 19833) with latest pvops dom0
>>> (commit 384a55c0). Booting will hang, following is the serial
>>> console output:
>>>
>>> (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch
>>> input to Xen ) (XEN) Freed 128kB 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=0, old_irq=-1, new_irq=0
>>> (XEN) ioapic_guest_write: old_entry=00010900, new_entry=000009f0
>>> (XEN) ioapic_guest_write: Attempt to add IO-APIC pin for in-use IRQ!
>>> (XEN) ioapic_guest_write: apic=0, pin=19, old_irq=19, new_irq=19
>>> (XEN) ioapic_guest_write: old_entry=0000a9c0, new_entry=0001a9c0
>>> (XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use
>>> IRQ! (XEN) ioapic_guest_write: apic=0, pin=19, old_irq=19, new_irq=19
>>> (XEN) ioapic_guest_write: old_entry=0000a9c0, new_entry=0001a9c0
>>> (XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use
>>> IRQ! (XEN) ioapic_guest_write: apic=0, pin=23, old_irq=23, new_irq=23
>>> (XEN) ioapic_guest_write: old_entry=0000a9d0, new_entry=0001a9d0
>>> (XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use
>>> IRQ! (XEN) ioapic_guest_write: apic=0, pin=19, old_irq=19, new_irq=19
>>> (XEN) ioapic_guest_write: old_entry=0000a9c0, new_entry=0001a9c0
>>> (XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use
>>> IRQ! (XEN) ioapic_guest_write: apic=0, pin=16, old_irq=16, new_irq=16
>>> (XEN) ioapic_guest_write: old_entry=0000a9b8, new_entry=0001a9b8
>>> (XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use
>>> IRQ! (XEN) ioapic_guest_write: apic=0, pin=18, old_irq=18, new_irq=18
>>> (XEN) ioapic_guest_write: old_entry=0000a921, new_entry=0001a921
>>> (XEN) ioapic_guest_write: Attempt to modify IO-APIC pin for in-use
>>> IRQ!
>>>
>>
>> The ioapic_guest_write messages are just noise, and have no bearing on
>> the problem.  Are there no more messages from the kernel after "about
>> to get started"?  The ioapic messages at least tell us it is getting
>> quite a distance into the boot and discovering devices.
>
> Actually, pv-ops dom0 boot successfully. I remotely access my machine via 
> serial console. Normally after dom0 boot, it display "login:" line. But 
> serial console stops at ioapic_guest_write messages when boot pv_ops, I 
> thought it's hung.
>
> But I found xend still cannot be started. I got the following messages when I 
> start it:
>
> [root@vt-randy ~]# xend start
> ERROR Internal error: Could not obtain handle on privileged command interface 
> (2 = No such file or directory)
> Traceback (most recent call last):
>  File "/usr/sbin/xend", line 36, in ?
>    from xen.xend.server import SrvDaemon
>  File "usr/lib64/python2.4/site-packages/xen/xend/server/SrvDaemon.py", line 
> 26, in ?
>  File "usr/lib64/python2.4/site-packages/xen/xend/server/relocate.py", line 
> 28, in ?
>  File "usr/lib64/python2.4/site-packages/xen/xend/XendDomain.py", line 35, in 
> ?
>  File "usr/lib64/python2.4/site-packages/xen/xend/XendCheckpoint.py", line 
> 20, in ?
>  File "usr/lib64/python2.4/site-packages/xen/xend/image.py", line 46, in ?
> xen.lowlevel.xc.Error: (1, 'Internal error', 'Could not obtain handle on 
> privileged command interface (2 = No such file or directory)')
>
>
>>
>>> Did anyone meet this issue? Is there any difference on build and
>>> installation between pvops dom0 and 2.6.18 dom0? Following is my
>>> instructions, pls correct me if something is wrong. Appreciate in
>>> advance.
>>>
>>> My build and installation instructions:
>>>      - cd xen-unstable.hg
>>>      - make world (linux-2.6-pvops.git will be cloned)
>>>      - make install
>>>
>>> My grub entry:
>>>      title Xen - pvops
>>>              root (hd0,2)
>>>              kernel /boot/xen.gz dom0_mem=512m
>>>              module /boot/vmlinuz-2.6-30.rc3-tip ro root=/dev/sda3
>>> console=tty0 console=ttyS0
>>>
>>
>> What happens if you have "console=hvc0 earlyprintk=xen
>> ignore_loglevel" on the "module" line?  You should get more output
>> from the kernel.  You might also want "console=com1,vga" on the Xen
>> line.
>>
>>     J
>
>
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