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

[David F Barrera <dfbp@xxxxxxxxxx>]

Ian,

One thing about RHEL 4 is that the devices in /dev seem to be created 
dynamically, at boot time.  When I mount the 'hdc1' partition and go to 
the /dev directory, there is nothing in it, as on a SuSE 9.0 or earlier 
Red Hat installs.  That is why I need an initrd, I suppose, to make or 
create those devices.
David

Ian Pratt wrote:

> > Derrick,
> >
> > I rebuilt the xenU kernel, with the devfs support disabled, and it makes 
> > no difference. It behaves in the same manner as the pre-built kernel 
> > that's included with the binary pack.  I am at a loss. I've been able to 
> > boot a kernel under xen on a SuSE Linux 9.0 machine, so I've had a 
> > little experience with this:-) 
> >    
> David, earlier in the boot messages do you see the hdc1 partition
> being found when the partition check happens?
>
> You'll need to export the partition 'rw' eventually, but that's
> not your current problem.
>
> You might like to try exporting it as 'sda1' or something to see
> if that helps. Not sure why it would, but I've heard folklore
> along these lines. 
>
> Adding some more debugging to the linuxrc nash script might shed
> some light on the problem. 
>
> Also, what happens if you skip the initrd and try booting
> directly off the disk. I doubt there's anything in the initrd you
> need.
>
> Ian
>
>
>  
>
> > Freeing unused kernel memory: 92k freed
> > Red Hat nash version 4.1.18 starting
> > Mounted /proc filesystem
> > Mounting sysfs
> > Creating /dev
> > Starting udev
> > Creating root device
> > Mounting root filesystem
> > mount: error 6 mounting ext3
> > mount: error 2 mounting none
> > Switching to new root
> > switchroot: mount failed: 22
> > umount /initrd/dev failed: 2
> > Kernel panic - not syncing: Attempted to kill init!
> > <0>Rebooting in 1 seconds..
> >
> >
> > David Barrera
> >
> >
> > Derrik Pates wrote:
> >
> >    
> >
> > > David F Barrera wrote:
> > >
> > >      
> > >
> > > > The distro I am using is  RHEL 4 Beta 2 (Red Hat Enterprise Linux 
> > > > Desktop release 3.90 (Nahant)
> > > >        
> > >      
> > >
> > > > /dev/hdc1               /                       ext2    
> > > > defaults        1 1
> > > >        
> > >      
> > >
> > > > LABEL=SWAP-hdc2         swap                    swap    
> > > > defaults        0 0
> > > > /dev/hda                /media/cdrom            auto    
> > > > pamconsole,fscontext=system_u:object_r:removable_t,ro,exec,noauto,managed 
> > > > 0 0
> > > >        
> > >      
> > >
> > > > # disk = [ 'phy:hda1,hda1,r' ]
> > > > disk = [ 'phy:hdc1,hdc1,r' ]
> > > >        
> > > Well, the configuration of the virtual disk looks correct; the swap 
> > > might disagree with it, but that shouldn't appear until later in the 
> > > boot process. Perhaps it's an interaction with devfs? Do you have 
> > > devfs enabled in your xenU (unprivileged domain) kernel? This gave me 
> > > fits when I first began using Xen, mostly because it seems that the 
> > > xenU prebuilt kernel that's included with the binary pack has devfs 
> > > support enabled, and this breaks things. The only other possibility I 
> > > can think of is that you need to change the block-device import to 
> > > read-write.
> > >      
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>
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