[uml-devel] mounting filesystems - mount crashes

[uml-devel] mounting filesystems - mount crashes

[Terry]

Hello,

I am trying to create a filesystem and have it mounted
during boot.  The virtual machine is redhat 9.

I created the filesystem on the host os with dd.  I
boot up my vm with ubd3=/uml/new_fs as a kernel
argument.  WHen inside the VM, I create an ext2
filesystem on it.  I am then able to mount it normally
from there.  When I add it to fstab as:
/dev/ubd/3     /usr            ext2    defaults 1 1
It blows chunks.  

It also did this for my home filesystem and I have to
mount that from rc.local and it works fine but I need
/usr before that.  Any ideas?

Thanks.

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Re: [uml-devel] mounting filesystems - mount crashes

[David Coulson]

Terry wrote:
> I created the filesystem on the host os with dd.  I
> boot up my vm with ubd3=/uml/new_fs as a kernel
> argument.  WHen inside the VM, I create an ext2
> filesystem on it.  I am then able to mount it normally
> from there.  When I add it to fstab as:
> /dev/ubd/3     /usr            ext2    defaults 1 1
> It blows chunks.  

What's the error message? What command line are you starting UML with? 
You need to give us some information to actually debug the problem.

David

-- 
David Coulson                                    email: d@vidcoulson.com
Linux Developer /                          web: http://davidcoulson.net/
Network Engineer                                   phone: (216) 533-6967



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Re: [uml-devel] mounting filesystems - mount crashes

[stian]

> Terry wrote:
>> I created the filesystem on the host os with dd.  I
>> boot up my vm with ubd3=/uml/new_fs as a kernel
>> argument.  WHen inside the VM, I create an ext2
>> filesystem on it.  I am then able to mount it normally
>> from there.  When I add it to fstab as:
>> /dev/ubd/3     /usr            ext2    defaults 1 1
>> It blows chunks.
>
> What's the error message? What command line are you starting UML with?
> You need to give us some information to actually debug the problem.

Do you get a kernel crashing, or just rc stuff failing due to most of all
shell-tools and stuff lies under /usr/bin, and therefor needs to be
mounted very early during the boot.


Stian


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Re: [uml-devel] mounting filesystems - mount crashes

[stian]

> Or Manually with fstab:
> mount /usr.new
> Child 23701 exited with signal 11
>
> I can get it mounted in the following ways:
> mount /dev/ubd/3 /usr
> mount -a (if its in fstab)

Since you are able to trigger the fault now, you can take a peek behind
the sceenes and play with strace.

strace mount /dev/ubd/3 /usr

and

strace mount /usr.new

normally should produce the same output and outfall for you.


Stian


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Re: [uml-devel] mounting filesystems - mount crashes

[Terry]

--- David Coulson <david@davidcoulson.net> wrote:
> Terry wrote:
> > I created the filesystem on the host os with dd. 
> I
> > boot up my vm with ubd3=/uml/new_fs as a kernel
> > argument.  WHen inside the VM, I create an ext2
> > filesystem on it.  I am then able to mount it
> normally
> > from there.  When I add it to fstab as:
> > /dev/ubd/3     /usr            ext2    defaults 1
> 1
> > It blows chunks.  
> 
> What's the error message? What command line are you
> starting UML with? 
> You need to give us some information to actually
> debug the problem.
> 
> David

During the boot process:
Mounting local filesystems:  Child 28884 exited with
signal 11

Or Manually with fstab:
mount /usr.new
Child 23701 exited with signal 11

I can get it mounted in the following ways:
mount /dev/ubd/3 /usr
mount -a (if its in fstab)

I start UML with:
./linux ubd0=/home/td/uml/root_fs
ubd1=/home/td/uml/home_fs ubd2=/home/td/uml/swap
ubd3=/home/td/uml/usr_fs eth0=tuntap,,,192.168.0.254
mem=512M

I took a peek at the script that mounts filesystems
and it is pretty basic.

Any ideas on how to get around this?  It works if I
put the mount command in rc.local but I need the
filesystem way before that gets ran.

Thanks.

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Re: [uml-devel] mounting filesystems - mount crashes

[David Coulson]

Terry wrote:
> Mounting local filesystems:  Child 28884 exited with
> signal 11

Sig 11 is usually bad RAM.

David

-- 
David Coulson                                    email: d@vidcoulson.com
Linux Developer /                          web: http://davidcoulson.net/
Network Engineer                                   phone: (216) 533-6967



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Re: [uml-devel] mounting filesystems - mount crashes

[Jeff Dike]

td3201@yahoo.com said:
> Child 23701 exited with signal 11
> Any ideas on how to get around this?  It works if I put the mount
> command in rc.local but I need the filesystem way before that gets
> ran. 

This is fixed in recent patches.

				Jeff



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