Can't make XFS work with 2.6.6

Can't make XFS work with 2.6.6

[David Johnson]

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Hello,

I'm having a problem getting my system to boot with 2.6.6 and a XFS root 
filesystem. On boot it can't mount the root fs:

XFS: Bad magic number
XFS: SB validate failed
Kernel Panic: VFS: Unable to mount root fs on unknown-block(0,0)

XFS is compiled in so it's not a module problem. Google says this error is 
usually caused by passing the wrong root parameter to the kernel, but I'm 
definitely giving the right root device.

I can boot just fine with 2.4.25 using exactly the same boot options in Grub.
I attach my .config. I'd be very greatful for any help with this. I've tried 
recompiling with XFS as a module and checked my version of xfsprogs meets the 
requirements.

Thanks in advance,
David.

-- 
David Johnson
http://www.david-web.co.uk/

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Re: Can't make XFS work with 2.6.6

[David Aubin]

On Thu, 2004-05-27 at 12:55, David Aubin wrote:
> Your ide support is compiled as a module.  If you are not calling out
> the module
> in your initrc, then you will get this.  Go back and compile in your
> ide support
> or scsi support as compiled in options.  Both are currently built as
> modules.
> 
> Dave Aubin
> 
> On Thu, 2004-05-27 at 12:36, David Johnson wrote: 
> > Hello,
> > 
> > I'm having a problem getting my system to boot with 2.6.6 and a XFS root 
> > filesystem. On boot it can't mount the root fs:
> > 
> > XFS: Bad magic number
> > XFS: SB validate failed
> > Kernel Panic: VFS: Unable to mount root fs on unknown-block(0,0)
> > 
> > XFS is compiled in so it's not a module problem. Google says this error is 
> > usually caused by passing the wrong root parameter to the kernel, but I'm 
> > definitely giving the right root device.
> > 
> > I can boot just fine with 2.4.25 using exactly the same boot options in Grub.
> > I attach my .config. I'd be very greatful for any help with this. I've tried 
> > recompiling with XFS as a module and checked my version of xfsprogs meets the 
> > requirements.
> > 
> > Thanks in advance,
> > David.

Re: Can't make XFS work with 2.6.6

[Jesse Barnes]

On Thursday, May 27, 2004 12:36 pm, David Johnson wrote:
> XFS is compiled in so it's not a module problem. Google says this error is
> usually caused by passing the wrong root parameter to the kernel, but I'm
> definitely giving the right root device.

Are you sure?  Make sure the device names haven't changed between your 2.4 and 
2.6 kernels.  This can happen if a new driver is compiled in that causes them 
to be reordered, or for other reasons.  XFS has been working fine in 2.6.6 
for me so far...

Jesse

Re: Can't make XFS work with 2.6.6

[David Johnson]

On Thursday 27 May 2004 17:55, David Aubin wrote:
> Your ide support is compiled as a module.  If you are not calling out
> the module
> in your initrc, then you will get this.  Go back and compile in your ide
> support
> or scsi support as compiled in options.  Both are currently built as
> modules.
>

OK, I recompiled with the IDE compiled in, but it didn't make much 
difference :-(
The error is the same except for: -

Instead of:
Kernel Panic: VFS: Unable to mount root fs on unknown-block(0,0)

I get:
Kernel Panic: VFS: Unable to mount root fs on hda3

Thanks for your help so far,
David.

-- 
David Johnson
http://www.david-web.co.uk/

Re: Can't make XFS work with 2.6.6

[David Aubin]

Hi Dave,

  Please include the latest copy of your .config.
Also the boot loader parameter as well.  And possibly
the validation that the root partition is of type XFS?

  At a glance it appears that XFS is not compilied in to
your kernel now, if that is your root mount file type.

Thanks,
Dave

On Thu, 2004-05-27 at 13:54, David Johnson wrote:
> On Thursday 27 May 2004 17:55, David Aubin wrote:
> > Your ide support is compiled as a module.  If you are not calling out
> > the module
> > in your initrc, then you will get this.  Go back and compile in your ide
> > support
> > or scsi support as compiled in options.  Both are currently built as
> > modules.
> >
> 
> OK, I recompiled with the IDE compiled in, but it didn't make much 
> difference :-(
> The error is the same except for: -
> 
> Instead of:
> Kernel Panic: VFS: Unable to mount root fs on unknown-block(0,0)
> 
> I get:
> Kernel Panic: VFS: Unable to mount root fs on hda3
> 
> Thanks for your help so far,
> David.

Re: Can't make XFS work with 2.6.6

[David Johnson]

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On Thursday 27 May 2004 19:00, David Aubin wrote:
> Hi Dave,
>
>   Please include the latest copy of your .config.

Attached.

> Also the boot loader parameter as well.  

From Grub's menu.lst:

title		Debian GNU/Linux, kernel 2.6.6
root		(hd0,0)
kernel	/vmlinuz-2.6.6 lapic video=rivafb:mode:1024x768x16 root=/dev/hda3 ro
initrd		/initrd.img-2.6.6
savedefault
boot

> And possibly 
> the validation that the root partition is of type XFS?

Here's the mount output from the system running a 2.4 kernel:

lug:/tmp# mount
/dev/hda3 on / type xfs (rw)
proc on /proc type proc (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/hda1 on /boot type ext3 (rw)
/dev/hda2 on /home type xfs (rw)
/dev/sda2 on /var type xfs (rw)
usbfs on /proc/bus/usb type usbfs (rw)

>   At a glance it appears that XFS is not compilied in to
> your kernel now, if that is your root mount file type.

XFS is compiled in. I really don't know what else to try...

Thanks,
David.

-- 
David Johnson
http://www.david-web.co.uk/

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Re: Can't make XFS work with 2.6.6

[David Aubin]

Did you create these drives with any of the following
attributes?
# CONFIG_XFS_RT is not set
# CONFIG_XFS_QUOTA is not set
# CONFIG_XFS_SECURITY is not set
# CONFIG_XFS_POSIX_ACL is not set
If you did then please enable them and rebuild your kernel.

Also, hd(0,0) is /dev/hda3 correct?  You didn't swap 
ide cables or anything and are now tring to boot off of
an old kernel?

I don't have an XFS system.  But I belive it works with 2.6.*
kernels.  You problem looks like you are missing xfs support in
your kernel.  If you say you have it compilied in, then perhaps
you are not booting the kernel you think you are.

Best of luck.
Dave

On Thu, 2004-05-27 at 14:25, David Johnson wrote:
> On Thursday 27 May 2004 19:00, David Aubin wrote:
> > Hi Dave,
> >
> >   Please include the latest copy of your .config.
> 
> Attached.
> 
> > Also the boot loader parameter as well.  
> 
> >From Grub's menu.lst:
> 
> title		Debian GNU/Linux, kernel 2.6.6
> root		(hd0,0)
> kernel	/vmlinuz-2.6.6 lapic video=rivafb:mode:1024x768x16 root=/dev/hda3 ro
> initrd		/initrd.img-2.6.6
> savedefault
> boot
> 
> > And possibly 
> > the validation that the root partition is of type XFS?
> 
> Here's the mount output from the system running a 2.4 kernel:
> 
> lug:/tmp# mount
> /dev/hda3 on / type xfs (rw)
> proc on /proc type proc (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> tmpfs on /dev/shm type tmpfs (rw)
> /dev/hda1 on /boot type ext3 (rw)
> /dev/hda2 on /home type xfs (rw)
> /dev/sda2 on /var type xfs (rw)
> usbfs on /proc/bus/usb type usbfs (rw)
> 
> >   At a glance it appears that XFS is not compilied in to
> > your kernel now, if that is your root mount file type.
> 
> XFS is compiled in. I really don't know what else to try...
> 
> Thanks,
> David.

Re: Can't make XFS work with 2.6.6

[Nathan Scott]

On Thu, May 27, 2004 at 05:36:08PM +0100, David Johnson wrote:
> Hello,
> 
> I'm having a problem getting my system to boot with 2.6.6 and a XFS root 
> filesystem. On boot it can't mount the root fs:
> 
> XFS: Bad magic number
> XFS: SB validate failed

This is XFS saying "I read the first sector ondisk, and it
doesn't have the XFS superblock magic number in the first
word".  This is the very first IO request XFS issues on mount.
The read has completed without an error, its the contents of
the buffer we get back that isn't an XFS superblock.

So, not a XFS compiled-in/module issue as was suggested, and
not an XFS issue at all - looks like there's some problem in
getting the root device identifier into the kernel I'd guess.

> Kernel Panic: VFS: Unable to mount root fs on unknown-block(0,0)

The "unknown" & (0,0) there is probably a hint, I've never come
across that before though.

cheers.

-- 
Nathan

Re: Can't make XFS work with 2.6.6

[Christoph Hellwig]

On Thu, May 27, 2004 at 05:36:08PM +0100, David Johnson wrote:
> Hello,
> 
> I'm having a problem getting my system to boot with 2.6.6 and a XFS root 
> filesystem. On boot it can't mount the root fs:
> 
> XFS: Bad magic number
> XFS: SB validate failed
> Kernel Panic: VFS: Unable to mount root fs on unknown-block(0,0)

This means your block driver isn't compiled in.  What device is your filesystem
on, are you using devfs or similar crap?

Re: Can't make XFS work with 2.6.6

[Christoph Hellwig]

On Thu, May 27, 2004 at 09:51:24PM +0100, Christoph Hellwig wrote:
> On Thu, May 27, 2004 at 05:36:08PM +0100, David Johnson wrote:
> > Hello,
> > 
> > I'm having a problem getting my system to boot with 2.6.6 and a XFS root 
> > filesystem. On boot it can't mount the root fs:
> > 
> > XFS: Bad magic number
> > XFS: SB validate failed
> > Kernel Panic: VFS: Unable to mount root fs on unknown-block(0,0)
> 
> This means your block driver isn't compiled in.  What device is your filesystem
> on, are you using devfs or similar crap?

Ok, the later mails answer the questions.  Sorry for the noise.

Re: Can't make XFS work with 2.6.6

[David Johnson]

On Thursday 27 May 2004 20:04, David Aubin wrote:
> Did you create these drives with any of the following
> attributes?
> # CONFIG_XFS_RT is not set
> # CONFIG_XFS_QUOTA is not set
> # CONFIG_XFS_SECURITY is not set
> # CONFIG_XFS_POSIX_ACL is not set
> If you did then please enable them and rebuild your kernel.

Nope, it's just a plain XFS partition as created by debian-installer.

>
> Also, hd(0,0) is /dev/hda3 correct?  You didn't swap
> ide cables or anything and are now tring to boot off of
> an old kernel?

hd(0,0) is hda1 which is the boot partition. And no I've not touched the IDE 
cables. A 2.4 kernel with an almost identical Grub entry works fine.

>
> I don't have an XFS system.  But I belive it works with 2.6.*
> kernels.  You problem looks like you are missing xfs support in
> your kernel.  If you say you have it compilied in, then perhaps
> you are not booting the kernel you think you are.

I have XFS working fine with 2.6.6 on another machine.
I've just made sure that I'm booting the correct kernel, and I am.

This is starting to drive me mad now!

Thanks,
David.

-- 
David Johnson
http://www.david-web.co.uk/

Re: Can't make XFS work with 2.6.6

[Christoph Hellwig]

Cna you send dmesg output for 2.4 and 2.6 if you can caputer the latter.
If not please compare them manually and check whether hda is still the
same device as in 2.4.  Also check if 2.6 finds more or less partitions.

Re: Can't make XFS work with 2.6.6

[David Aubin]

Hi Dave,

  I think the problem is this:
 hd0,0 is /dev/hda1.  Your kernel is in /dev/hda3.
You want to have hd0,2, not hd0,0.  As for the output
you see.  You must have a kernel at /dev/hda1 that does
not support XFS and hence the unknown fs error.
Please fix your grub entry and you should have fun.

Dave
On Thu, 2004-05-27 at 14:25, David Johnson wrote:
> On Thursday 27 May 2004 19:00, David Aubin wrote:
> > Hi Dave,
> >
> >   Please include the latest copy of your .config.
> 
> Attached.
> 
> > Also the boot loader parameter as well.  
> 
> >From Grub's menu.lst:
> 
> title		Debian GNU/Linux, kernel 2.6.6
> root		(hd0,0)
> kernel	/vmlinuz-2.6.6 lapic video=rivafb:mode:1024x768x16 root=/dev/hda3 ro
> initrd		/initrd.img-2.6.6
> savedefault
> boot
> 
> > And possibly 
> > the validation that the root partition is of type XFS?
> 
> Here's the mount output from the system running a 2.4 kernel:
> 
> lug:/tmp# mount
> /dev/hda3 on / type xfs (rw)
> proc on /proc type proc (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> tmpfs on /dev/shm type tmpfs (rw)
> /dev/hda1 on /boot type ext3 (rw)
> /dev/hda2 on /home type xfs (rw)
> /dev/sda2 on /var type xfs (rw)
> usbfs on /proc/bus/usb type usbfs (rw)
> 
> >   At a glance it appears that XFS is not compilied in to
> > your kernel now, if that is your root mount file type.
> 
> XFS is compiled in. I really don't know what else to try...
> 
> Thanks,
> David.

Re: Can't make XFS work with 2.6.6

[David Johnson]

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On Thursday 27 May 2004 22:08, David Aubin wrote:
> Hi Dave,
>
>   I think the problem is this:
>  hd0,0 is /dev/hda1.  Your kernel is in /dev/hda3.
> You want to have hd0,2, not hd0,0.  As for the output
> you see.  You must have a kernel at /dev/hda1 that does
> not support XFS and hence the unknown fs error.
> Please fix your grub entry and you should have fun.
>

Nope. My kernel is on /dev/hda1 (hd0,0) which is the boot partition. 
Then /dev/hda3 is the root partition.

I am booting the correct kernel - with XFS support.

> Cna you send dmesg output for 2.4 and 2.6 if you can caputer the latter.
> If not please compare them manually and check whether hda is still the
> same device as in 2.4.  Also check if 2.6 finds more or less partitions.

I've attached my 2.4 dmesg.
I can't capture or even read the 2.6 output as it scrolls off the screen too 
fast. I think it's finding the drive and using the correct IDE chipset 
driver, but I can't see the details.

I really can't see why this is happening. All the usual IDE stuff is compiled 
in, as is the correct IDE chipset driver, as is XFS...

Thanks,
David.

-- 
David Johnson
http://www.david-web.co.uk/

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Re: Can't make XFS work with 2.6.6

[David Aubin]

Hi Dave,

  You do not have devfs enabled.  So root=/dev/hda3
should not work.  Please enable in kernel and retry.

# CONFIG_DEVFS_FS is not set

Dave

On Thu, 2004-05-27 at 14:25, David Johnson wrote:
> On Thursday 27 May 2004 19:00, David Aubin wrote:
> > Hi Dave,
> >
> >   Please include the latest copy of your .config.
> 
> Attached.
> 
> > Also the boot loader parameter as well.  
> 
> >From Grub's menu.lst:
> 
> title		Debian GNU/Linux, kernel 2.6.6
> root		(hd0,0)
> kernel	/vmlinuz-2.6.6 lapic video=rivafb:mode:1024x768x16 root=/dev/hda3 ro
> initrd		/initrd.img-2.6.6
> savedefault
> boot
> 
> > And possibly 
> > the validation that the root partition is of type XFS?
> 
> Here's the mount output from the system running a 2.4 kernel:
> 
> lug:/tmp# mount
> /dev/hda3 on / type xfs (rw)
> proc on /proc type proc (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> tmpfs on /dev/shm type tmpfs (rw)
> /dev/hda1 on /boot type ext3 (rw)
> /dev/hda2 on /home type xfs (rw)
> /dev/sda2 on /var type xfs (rw)
> usbfs on /proc/bus/usb type usbfs (rw)
> 
> >   At a glance it appears that XFS is not compilied in to
> > your kernel now, if that is your root mount file type.
> 
> XFS is compiled in. I really don't know what else to try...
> 
> Thanks,
> David.

Re: Can't make XFS work with 2.6.6

[David Johnson]

On Thursday 27 May 2004 23:08, David Aubin wrote:
> Hi Dave,
>
>   You do not have devfs enabled.  So root=/dev/hda3
> should not work.  Please enable in kernel and retry.
>
> # CONFIG_DEVFS_FS is not set
>

But surely enabling devfs will stop /dev/hda3 working completely. Then 
wouldn't the path be something like /dev/ide/disk0/part1/blah/blah/blah.

I'm not using devfs with 2.4 and it works fine.

Thanks,
David.

-- 
David Johnson
http://www.david-web.co.uk/

Re: Can't make XFS work with 2.6.6

[Christoph Hellwig]

On Thu, May 27, 2004 at 06:08:23PM -0400, David Aubin wrote:
> Hi Dave,
> 
>   You do not have devfs enabled.  So root=/dev/hda3
> should not work.  Please enable in kernel and retry.
> 
> # CONFIG_DEVFS_FS is not set

Exactly the wrong way around.  If you're brave enough to use
devfs you need to use devfs names on the command line.

Re: Can't make XFS work with 2.6.6

[Måns Rullgård]

Christoph Hellwig <hch@infradead.org> writes:

> On Thu, May 27, 2004 at 06:08:23PM -0400, David Aubin wrote:
>> Hi Dave,
>> 
>>   You do not have devfs enabled.  So root=/dev/hda3
>> should not work.  Please enable in kernel and retry.
>> 
>> # CONFIG_DEVFS_FS is not set
>
> Exactly the wrong way around.  If you're brave enough to use
> devfs you need to use devfs names on the command line.

Not at all.

$ cat /proc/cmdline 
root=/dev/hda1 video=sisfb:mode:1024x768x8
$ gunzip -c /proc/config.gz | grep DEVFS
CONFIG_DEVFS_FS=y
CONFIG_DEVFS_MOUNT=y
# CONFIG_DEVFS_DEBUG is not set

Yes, I should switch to udev, but I don't have time to mess around
with that stuff right now, and the machine works the way it is.

-- 
Måns Rullgård
mru@kth.se

Re: Can't make XFS work with 2.6.6

[Andries Brouwer]

On Thu, May 27, 2004 at 10:47:15PM +0100, David Johnson wrote:

> I've attached my 2.4 dmesg.

> dmesg-2.4.gz

Compressing is a bad idea. Many people will glance at the stuff
if it is easy to do so, but if you make it time-consuming to
look, they'll pass.