Re: 2.6.27-rc7 no init found on the root partition?

Re: 2.6.27-rc7 no init found on the root partition?

[Dave Chinner]

On Wed, Sep 24, 2008 at 09:22:27PM +0200, Lukas Hejtmanek wrote:
> Hello,
> 
> I have a box that has XFS root partition, I have kernel 2.6.26.3 that boots
> pretty well on that box. Today, I've tried 2.6.27-rc7 (so that I can test
> NFSv4 over IPv6), but the kernel is unable to boot. It says that root
> partition is mounted, XFS file system but no init found.

Can you paste the error messages or send pointers to screen shots of
the error?

If you go back to 2.6.26.3, does the kernel boot ok?

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

Re: 2.6.27-rc7 no init found on the root partition?

[Lukas Hejtmanek]

On Thu, Sep 25, 2008 at 09:03:26AM +1000, Dave Chinner wrote:
> On Wed, Sep 24, 2008 at 09:22:27PM +0200, Lukas Hejtmanek wrote:
> > Hello,
> > 
> > I have a box that has XFS root partition, I have kernel 2.6.26.3 that boots
> > pretty well on that box. Today, I've tried 2.6.27-rc7 (so that I can test
> > NFSv4 over IPv6), but the kernel is unable to boot. It says that root
> > partition is mounted, XFS file system but no init found.
> 
> Can you paste the error messages or send pointers to screen shots of
> the error?

http://undomiel.ics.muni.cz/tmp/IMG_2962.JPG

this one is if I pass init=/bin/bash
http://undomiel.ics.muni.cz/tmp/IMG_2961.JPG

> If you go back to 2.6.26.3, does the kernel boot ok?

indeed.


this is a grub record:

title Linux 2.6.26.3
root (hd0,0)
kernel /boot/vmlinuz-2.6.26.3 root=/dev/sda1 ro console=tty0

title Linux 2.6.27-rc7
root (hd0,0)
kernel /boot/vmlinuz-2.6.27-rc7 root=/dev/sda1 ro 


-- 
Lukáš Hejtmánek

Re: 2.6.27-rc7 no init found on the root partition?

[Eric Sandeen]

Lukas Hejtmanek wrote:

> this is a grub record:
> 
> title Linux 2.6.26.3
> root (hd0,0)
> kernel /boot/vmlinuz-2.6.26.3 root=/dev/sda1 ro console=tty0
> 
> title Linux 2.6.27-rc7
> root (hd0,0)
> kernel /boot/vmlinuz-2.6.27-rc7 root=/dev/sda1 ro 

Is it possible that device ordering has changed?  what if you do:

> title Linux 2.6.27-rc7
> root (hd0,0)
> kernel /boot/vmlinuz-2.6.27-rc7 root=LABEL=$WHATEVER ro

and try mounting root by label? (or UUID ...)

-Eric

Re: 2.6.27-rc7 no init found on the root partition?

[Lukas Hejtmanek]

On Thu, Sep 25, 2008 at 08:48:40AM -0500, Eric Sandeen wrote:
> Is it possible that device ordering has changed?  what if you do:

no, using printk's I found that search_binary_handler is the one that fails.
Dunno why.

-- 
Lukáš Hejtmánek

Re: 2.6.27-rc7 no init found on the root partition?

[Dave Chinner]

On Thu, Sep 25, 2008 at 01:12:40PM +0200, Lukas Hejtmanek wrote:
> On Thu, Sep 25, 2008 at 09:03:26AM +1000, Dave Chinner wrote:
> > On Wed, Sep 24, 2008 at 09:22:27PM +0200, Lukas Hejtmanek wrote:
> > > Hello,
> > > 
> > > I have a box that has XFS root partition, I have kernel
> > > 2.6.26.3 that boots pretty well on that box. Today, I've tried
> > > 2.6.27-rc7 (so that I can test NFSv4 over IPv6), but the
> > > kernel is unable to boot. It says that root partition is
> > > mounted, XFS file system but no init found.
> > 
> > Can you paste the error messages or send pointers to screen
> > shots of the error?
> 
> http://undomiel.ics.muni.cz/tmp/IMG_2962.JPG

Hmmm - the filesystem mounted without errors, but init was not
found. Strange.

> this one is if I pass init=/bin/bash
> http://undomiel.ics.muni.cz/tmp/IMG_2961.JPG

Same again, it's unable to run the init process.

Of course, kernel_execve() throws away any error that might
have occurred, so without hacking the init code we can't find out
why it failed.

> > If you go back to 2.6.26.3, does the kernel boot ok?
> 
> indeed.

Ok, is the 2.6.27 kernel based on the same config as the 2.6.26
kernel?

> this is a grub record:
> 
> title Linux 2.6.26.3 root (hd0,0) kernel /boot/vmlinuz-2.6.26.3
> root=/dev/sda1 ro console=tty0
> 
> title Linux 2.6.27-rc7 root (hd0,0) kernel
> /boot/vmlinuz-2.6.27-rc7 root=/dev/sda1 ro 

Does it boot if you take away the "ro" option?

Cheers,

Dave.
> 
> 
> -- Lukáš Hejtmánek
> 
> 
> 

-- 
Dave Chinner
david@fromorbit.com