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

To: Lukas Hejtmanek <xhejtman@xxxxxxxxxxx>
Subject: Re: 2.6.27-rc7 no init found on the root partition?
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 26 Sep 2008 09:41:30 +1000
Cc: linux-kernel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
In-reply-to: <20080925111239.GF31582@xxxxxxxxxxx>
Mail-followup-to: Lukas Hejtmanek <xhejtman@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx
References: <20080924192227.GC31582@xxxxxxxxxxx> <20080924230326.GM5448@disturbed> <20080925111239.GF31582@xxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
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@xxxxxxxxxxxxx

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