Re: [Xen-users] XEN 3.0.3 on Ubuntu 6.10: Dom0 reboot

[PUCCETTI Armand <armand.puccetti@xxxxxx>]

Petersson, Mats a écrit :
>  
>
>  
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of PUCCETTI 
> > Armand
> > Sent: 30 November 2006 17:42
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-users] XEN 3.0.3 on Ubuntu 6.10: Dom0 reboot
> >
> > I just compiled XEN 3.0.3 on Ubuntu 6.10 (kernel 2.6.17-10) with the 
> > following flags:
> > $ make dist CC=gcc-4.1 verbose=y debug=y perfc=y debugger=y
> > $ make install CC=gcc-4.1 verbose=y debug=y perfc=y debugger=y
> >
> > And added the simple following lines to my GRUB config:
> >
> > title           Xen 3.0.3 / Linux 2.6.16.29
> > root            (hd0,2)
> > kernel          /boot/xen-3.0.3-0.gz dom0_mem=1048576
> > module          /boot/vmlinuz-2.6.16.29-xen root=/dev/sda3 ro 
> > max_loop=64
> > #module         /boot/initrd.img-2.6.16.29-xen
> > savedefault
> > boot
> >
> > Booting that Xenified Ubuntu leads it to crash and reboot just after 
> > the line:
> > (XEN) XEN trace buffers: disabled
> >
> > Does anyone knwo about causes to that crash?
> >     
> Not very easy from that description - it could be just about anything -
> the next thing that happens is that the actual linux kernel is loaded,
> which may have something to do with the "crash".
> If you have the ability to use serial port and a second machine to log
> the serial output, that would help a whole lot.   I'm a little bit 
> concerned that your initrd is commented out - have you
> disabled modules in the 2.6.16.29-xen kernel? If not, then you're most
> likely going to fail on boot because the drivers for your SCSI/SATA
> (sda?) aren't available.   
The config file for my P4 HT w/ EMT64 is apaprently 
./buildconfigs/linux-defconfig_xen_x86_64
in the source distribution. The SATA related parameters are as follows:

CONFIG_SCSI_SATA=y
CONFIG_SCSI_SATA_AHCI=y
CONFIG_SCSI_SATA_SVW=y
CONFIG_SCSI_ATA_PIIX=y
CONFIG_SCSI_SATA_MV=y
CONFIG_SCSI_SATA_NV=y
CONFIG_SCSI_PDC_ADMA=y
CONFIG_SCSI_SATA_QSTOR=y
CONFIG_SCSI_SATA_PROMISE=y
CONFIG_SCSI_SATA_SX4=y
CONFIG_SCSI_SATA_SIL=y
CONFIG_SCSI_SATA_SIL24=y
CONFIG_SCSI_SATA_SIS=y
CONFIG_SCSI_SATA_ULI=y
CONFIG_SCSI_SATA_VIA=y
CONFIG_SCSI_SATA_VITESSE=m
CONFIG_SCSI_SATA_INTEL_COMBINED=y

That should build the SATA drivers I presume and load them.
(I have an Intel 82801 SATA controller IDE).


I do not have an initrd RAM disk as I could not build it by hand. The 
default XEN distro
does not make it by default. When I produce it by hand, I get the error:

$ mkinitrd -o initrd.img-2.6.16.29-xen 2.6.16.29-xen
File descriptor 3 left open
File descriptor 4 left open
File descriptor 5 left open
File descriptor 6 left open
File descriptor 7 left open
  Finding all volume groups
No volume groups found
/usr/sbin/mkinitrd: 253:0: Cannot find LVM device


But, when I change in the config file the MD parameter to n, the same 
err comes out.
Is there any parameter about LVM to change?

#
# Multi-device support (RAID and LVM)
#
CONFIG_MD=n
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID10=m
CONFIG_MD_RAID5=m
CONFIG_MD_RAID6=m
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m

> Likewise, you may need to modify the configuration to add the SCSI/SATA
> drivers necessary for your hardware - check that the right drivers are
> there (lsmod on a working configuration may help figuring out which
> drivers you need, for example).   
In my distribution, the SATA related drivers built, and located in 
./dist/install/lib/modules/2.6.16.29-xen/kernel/drivers/scsi are
sata_mv.ko       sata_qstor.ko  sata_sis.ko  sata_uli.ko
sata_nv.ko       sata_sil24.ko  sata_svw.ko  sata_via.ko
sata_promise.ko  sata_sil.ko    sata_sx4.ko  sata_vsc.ko

On the host platform (same machine w/ Ubuntu 6.10),I have the modules:

ata_piix               13828  6
libata                 88984  1 ata_piix
scsi_mod              181424  3 sg,sd_mod,libata

Now, what modules should I load such that it becomes loaded by default 
in XEN?
>  
> > Curiously, the first compilation of XEN downloads kernel 2.6.16.29 
> > and not 2.6.17.10 which is actually
> > running on the host machine! Can that be configured? maybe using an 
> > option as KERNEL="2.6.17*" ?
> >     
> The Xen source code contains a specification of which kernel to use, in
> this case 2.6.16.29. To use a different kernel, you'll need to specify
> which kernel you want, but also, you're not guaranteed that the patches
> for the kernel will work without problems with a different kernel - it
> may, but it's also possible that it doesn't.
> I think you'll need to specify the EXACT kernel version from
> www.kernel.org that you want to download, no wildcards would be
> allowed...   
OK
> --
> Mats
>   
thanks for your help.

Armand
> > Thanks in advance for any hint!
> >
> >
> >
> >
> > PS: The only change wrt the original XEN source was in file 
> > xen-3.0.3_0-src/linux-2.6.16.29-xen/kernel/panic.c
> > where I added the patch
> >
> > // #ifdef CONFIG_STACK_PROTECTOR
> > void __stack_chk_fail(void)
> > {
> >  panic("stack-protector: Stack is corrupted\n");
> > }
> > EXPORT_SYMBOL(__stack_chk_fail);
> > //#endif
> >
> > otherwise XEN does not compile correctly but errs with an undefined 
> > __stack_chk_fail symbol.
> >
> >
> >
> >
> >
> > _______________________________________________
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> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> >
> >
> >
> >     
>
>
>   


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