[fedora-virt] pv_ops dom0 kernel RPM, configuration & setup help anyone?

[Lester M.]

On Wed, Jul 8, 2009 at 3:29 PM, Pasi Kärkkäinen <pasik at iki.fi> wrote:

> On Wed, Jul 08, 2009 at 02:05:35PM -0400, Lester M. wrote:
> >
> > Hello Pasi,
> >
> > Unfortunately with adding "loglvl=all guest_loglvl=all noreboot" and
> > removing "rhgb quiet" from the vmlinuz the result stayed the same.
> >
> > After the boot process gets to the "(XEN) Scrubbing Free RAM:
> > ..........done." the screen still goes blank, and the system ceases to
> > respond. This forces me to do a "hard reset" on my laptop. :-(
> >
>
> Hmm.. The boot process should look something like this:
>
> ..
> (XEN) Scrubbing Free RAM: ..........done.
> (XEN) Xen trace buffers: disabled
> (XEN) Std. Loglevel: All
> (XEN) Guest Loglevel: All
> (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input
> to Xen)
> (XEN) Freed 104kB init memory.
> mapping kernel into physical memory
> Xen: setup ISA identity maps
> about to get started...
> Reserving virtual address space above 0xf5800000
> PAT disabled on Xen
> Initializing cgroup subsys cpuset
> Initializing cgroup subsys cpu
> Linux version 2.6.30-rc6-tip (root at dom0test.localdomain) (gcc version
> 4.4.0
> 20090506 (Red Hat 4.4.0-4) (GCC) ) #15 SMP T
> ue Jun 9 19:36:50 EEST 2009
> KERNEL supported cpus:
>  Intel GenuineIntel
>  AMD AuthenticAMD
>  NSC Geode by NSC
>  Cyrix CyrixInstead
>  Centaur CentaurHauls
>  Transmeta GenuineTMx86
>  Transmeta TransmetaCPU
>  UMC UMC UMC UMC
> BIOS-provided physical RAM map:
>  Xen: 0000000000000000 - 000000000009f400 (usable)
>  Xen: 000000000009f400 - 0000000000100000 (reserved)
>  Xen: 0000000000100000 - 0000000040000000 (usable)
>  Xen: 000000007f6e0000 - 000000007f6e3000 (ACPI NVS)
>  Xen: 000000007f6e3000 - 000000007f6f0000 (ACPI data)
>  Xen: 000000007f6f0000 - 000000007f700000 (reserved)
>  Xen: 00000000e0000000 - 00000000f0000000 (reserved)
>  Xen: 00000000fec00000 - 0000000100000000 (reserved)
> console [xenboot0] enabled
>
> etc
>
> So the dom0 kernel should get booted up pretty shortly after that Scrubbing
> Free RAM..
>
>
> > This is my grub entry with the "loglvl=all guest_loglvl=all noreboot"
> added:
> >
> > title Fedora (2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.PAE)
> >         root (hd0,0)
> >         kernel /xen-3.4.1-rc6.gz dom0_mem=1024M loglvl=all
> guest_loglvl=all
> > com1=19200,8n1 console=com1
> >         module /vmlinuz-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.PAE ro
> > root=/dev/mapper/vg01-lv_root
> >         module /initrd-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.PAE.img
> >
>
> You shouldn't have the "com1=19200,8n1 console=com1" there if you want to
> use
> the VGA text console..
>
> >
> >
> > When I set up a serial console and boot the system, the screen
> immediately
> > goes "blank" and the system ceases to function as well. The difference is
> > that this occurs sooner using the serial console than after the "(XEN)
> > Scrubbing Free RAM: ..........done." occurrence.
> >
>
> When you have a serial console in use, the screen _should_ go blank
> immediately,
> because the console output is redirected to the serial port/console.
>
> So the behaviour you're seeing there is expected.
>
> > This is my grub entry with the serial console setup from the xenpvops
> page:
> >
> > title Fedora (2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.PAE)
> >         root (hd0,0)
> >         kernel /xen-3.4.1-rc6.gz dom0_mem=1024M loglvl=all
> guest_loglvl=all
> > com1=19200,8n1 console=com1
> >         module /vmlinuz-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.PAE ro
> > root=/dev/mapper/vg01-lv_root console=hvc0 earlyprintk=xen
> >         module /initrd-2.6.31-0.1.2.37.rc1.git5.xendom0.fc12.i686.PAE.img
> >
>
> That looks correct, if your laptop serial port actually is com1.
> Do you see the Xen and dom0 kernel boot messages on the serial console?
>
> >
> > So all of this works on your system and not mine. Unfortunately this is
> all
> > the hardware I am able to test on at this time. I don't know how many
> people
> > are running this xen configuration on a Lenovo T60 laptop but there is
> > clearly something missing.
> >
> > What more should I test to get this working? :-) Anything goes at this
> > point, but I do hope the developers / maintainers are reading this
> thread.
> > :-P
>
> Do you have to specify any non-default parameters to xen or dom0 kernel
> when
> you use RHEL 5.3 on the laptop?
>
> -- Pasi
>

Pasi, and M A Young;

Thank you so much for the information thus far, I really appreciate the
feedback in resolving this. :-)

What Kernel options should I use to get a vga console? (to just have
*everything* dump on my screen?) I do not have a "real" serial console on my
consumer laptop.

On RHEL 5.3 I have no extra options than the defaults (which includes the
"rhgb quiet" on the vmlinuz line), it just boots! I took a look at that
earlier.

I will try out your 32bit .config, did you get your kernel checkout from:
(git clone git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.gitlinux-2.6-xen)
?

Also, did you use the latest branch? (from: git checkout origin/xen-tip/next
-b xen-tip/next) ?
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