Re: [Xen-devel] Kernel panic - not syncing: Attempted to kill init!

[David F Barrera <dfbp@xxxxxxxxxx>]

Ian,

OK. I copied all the contents from (hdc3) /dev to (hdc1) /dev, and that 
let's me boot xenU on hdc1.  The problem, however, is that this is not 
they way RHEL 4 works--I need to figure out how the xen0 is able to boot 
off essentially the same setup.
[root@dyn95394184 xen]# xm list
Name              Id  Mem(MB)  CPU  State  Time(s)  Console
Domain-0           0      495        0      r----    126.0
test1                   1        64        0      -b---       2.0    9601
[root@dyn95394184 xen]#




-------- Original Message --------
Subject: 	Re: [Xen-devel] Kernel panic - not syncing: Attempted to kill 
init!
Date:   Tue, 21 Dec 2004 12:53:15 -0600
From:   David F Barrera <dfbp@xxxxxxxxxx>
To:     xen-devel@xxxxxxxxxxxxxxxxxxxxx
References: 	<E1CgWrK-0003vv-00@xxxxxxxxxxxxxxxxx> 
<41C844BA.7020801@xxxxxxxxxx>


Ian,

As I indicated earlier, I created an image file, and I am able to boot 
xenU now:
Red Hat Enterprise Linux Desktop release 3.90 (Nahant)
Kernel 2.6.9-xenU on an i686

(none) login:

I still can't log in, but I will continue to add files to the image to 
make it work.  In the image, I copied the contents of  (hdc3) /dev to 
the  image/dev.  I still don't understand why I can get xenU to boot 
using the system partition (hdc1). I'll keep digging.
David F Barrera

> Ian Pratt wrote:
>
> > > > > I had tried that (and hda1) before, but sda1 I get an error, too:
> > > > > [root@dyn95394184 xen]# xm create -c test1 vmid=1
> > > > > Using config file "test1".
> > > > > Error: Error creating domain: vbd: Device not found: sda1
> > > > >       
> > > > try  disk = [ 'phy:hdc1,0801,w' ]
> > > >
> > > > 0801 == sda1
> > > >     
> > > No difference.  Same Kernel panic
> > >   
> >
> > Something odd is going on here -- I believe other people have had
> > RHEL3 working.
> >  
> I believe it.  But RHEL 4 has some differences from RHEL 3, among them 
> the fact that in RHEL 4 the devices in /dev are created dynamically.  
> Thus, if I mount hdc1 and look at /dev, it is empty.  However, /dev in 
> hdc3 (xen0) has 671 entries. I have a SuSE 9.0 system where the drive 
> that I export (equivalent to hdc1, in this case) has many devicen on 
> /dev, meaning they are static;  RHEL 3 is similar.
> > Can you mount hdc1 in dom 0 OK?
> Yes:
>
> [root@dyn95394184 ~]# mount /dev/hdc1 /data1
> [root@dyn95394184 ~]# df
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/hdc3              6372520   2732376   3316436  46% /
> none                    251384         0    251384   0% /dev/shm
> /dev/hdc1              7055144   2422572   4274180  37% /data1
> [root@dyn95394184 ~]#
>
> > Is there an sbin/init
> [root@dyn95394184 ~]# ls /data1/sbin/init
> /data1/sbin/init
> [root@dyn95394184 ~]#
>
> > ? Is there
> > a dev directory?  
> Yes, but it is empty:
> [root@dyn95394184 dev]# pwd
> /data1/dev
> [root@dyn95394184 dev]# ls
> [root@dyn95394184 dev]#
>
> > It might be worth enabling the debugging printks in
> > drivers/xen/blkfront/block.h and drivers/xen/blockback/common.h
> > and rebuilding xen0 / xenU.
> >
> >  
> I created an image file to experiment, and it seems to go a little 
> further.  The problem has got to be related to the /dev issue.
> disk = [ 'file:/boot/initrd.x86.image,0801,w' ]
> # Set if you want dhcp to allocate the IP address.
> # dhcp="dhcp"
> # Set root device.
> root = "/dev/sda1 ro"
>
>
> Red Hat nash version 4.1.18 starting
> Mounted /proc filesystem
> Mounting sysfs
> Creating /dev
> Starting udev
> Creating root device
> Mounting root filesystem
> Switching to new root
> init started:  BusyBox v1.00-pre10 (2004.06.10-04:09+0000) multi-call 
> binary
> Linux localhost.localdomain 2.6.9-xenU #1 Fri Dec 17 15:50:10 CST 2004 
> i686 unknown
>
> > Ian
> >
> >
> >
> >
> >  

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