Re: [Xen-devel] Porting of Guest OS

["Amitabh Tamhane" <amitabh_2k@xxxxxxxxxxx>]

Thank you for the information!

And yes, I am trying to boot a 2.6 kernel and I am also using the 
vmlinuz-2.6*xenU in the config file (it was a typo in my last email)
Actually, I was playing with it for a while and could partially boot the 
guest OS.
The exact error I am getting is: Could not find LABLE=/ and boots in the 
"repair filesystem" mode.
The guest OS could talk with the outside world but `xm list` command shows 
state as -b--- (blocked) for the domain I am trying to boot.
I didn't check the /etc/fstab file, could that be the problem or is it 
because I am not specifying something properly in the config file?
Lastly, if you could give me a link to your modified xen-U kernels it would 
be great.
Again thank you for ur feedback.

Regards,
Amitabh

From: "Fajar A. Nugraha" <fajar@xxxxxxxxxxxx>
To: xen-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Porting of Guest OS
Date: Thu, 30 Dec 2004 09:58:32 +0700

Amitabh Tamhane wrote:

> Hi,
> I am trying to boot a guest OS (SuSE 2.6 kernel) on Xen. But, it is giving 
> me boot errors.
> The steps I followed:
> 1) Created a raw diskFile with ext3 filesystem
> 2) Copied /{root,etc,dev,var,usr,bin,sbin,lib} from my SuSE 2.6 
> installation on to the diskFile
I would suggest you copy everything from a non-running linux installation.
You could also use a running machine as starting point, but you should 
exclude these files :
/proc/*
/var/log/*/*
/var/run/*/*
/var/run/*.pid
/var/tmp/*
/var/lock/*/*
/dev/mapper/*
/tmp/*
/sys/*
/mnt/*/*

Note that you NEED /proc, but you don't need anything under it.
Then you have to modify /etc/fstab accordingly, and use /dev/sda1 as root.

> 3) Created a config file as:
> Important parameters are as follows:
> kernel = "/boot/vmlinuz-2.4.27-xenU"
> disk = ['file:FullPathToTheDiskFile,sda1,w']
> root = "/dev/sda1"
> (other parameters skipped)
>
> 4) Booted-up the new Domain
>
> It is giving some-errors like /lib/modules/2.6.9-xenU/modules.dep not 
> found. And boots up in the
You need to copy /lib/modules/2.6.9-xenU/ from the physical server (the 
server you're running xen's
"make install" from) to the virtual server. Alternatively, recompile the 
xen-U kernel
to disable modules support and you can ignore the error completely.
If you're running athlon-xp or P4/Xeon, I can share my xen-U kernel (or the 
.config), with modules disabled,
optimized for those platform.

> Can anyone tell me what exact changes do i need to make to the SuSE 2.6 
> kernel to be able to boot it as a new Domain?
Are you using 2.4 or 2.6? Your xen config file says 2.4.

> I understand that the machine dependent code has to be changed with  new 
> code provided by Xen....but I could not find a place where it 
> says........."These are the exacts steps you need to follow for porting of 
> Guest OS in a Domain"
Because it's not there yet :)

Regards,

Fajar


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Amitabh P. Tamhane

'THERE IS NO SHORT-CUT TO SUCCESS!'




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