[uml-devel] Something wrong with booting the UML in new kernel

[uml-devel] Something wrong with booting the UML in new kernel

[An Ching]

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Hi,

I had recompiled my host kernel with setting the EXT2_FS_SECURITY and EXT3_FS_SECURITY in filesystem configuration. My UML is OK before doing this, but now I can not boot the UML in the new-recompiled kernel. It just went to the step...

[root@RH9 linux-2.6.17]# ./linux root=/dev/sda1 rootflags=/ rootfstype=hostfs ro con0=fd:0,fd;1 init/bin/sh -l
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK
Checking for tmpfs mount on /dev/shm...OK
Checking PROT_EXEC mmap in /dev/shm/...OK
Checking for the skas3 patch in the host:
  - /proc/mm...not found
  - PTRACE_FAULTINFO...not found
  - PTRACE_LDT...not found
UML running in SKAS0 mode
Checking that ptrace can change system call numbers...OK
Checking syscall emulation patch for ptrace...OK
Checking advanced syscall emulation patch for ptrace...OK

Just down to this step, and not any response next...

I guessed maybe the kernel of UML didn't support the XATTR  of filesystem and then I reconfigured the UML and set EXT2_XATTR, EXT2_FS_SECURITY, EXT3_XATTR, EXT3_FS_SECURITY to "Y". But after I recompiled the kernel of UML and run it,  I  was given the same  message mentioned above.

What should do  next?   Could anybody  give me some advices?

Thank you very much~

Best Regards,

An  Ching 

 		
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Re: [uml-devel] Something wrong with booting the UML in new kernel

[Blaisorblade]

On Sunday 21 January 2007 03:34, An Ching wrote:
> Hi,
>
> I had recompiled my host kernel with setting the EXT2_FS_SECURITY and
> EXT3_FS_SECURITY in filesystem configuration. My UML is OK before doing
> this, but now I can not boot the UML in the new-recompiled kernel. It just
> went to the step...
>
> [root@RH9 linux-2.6.17]# ./linux root=/dev/sda1 rootflags=/
> rootfstype=hostfs ro con0=fd:0,fd;1 init/bin/sh -l Checking that ptrace can
> change system call numbers...OK
> Checking syscall emulation patch for ptrace...OK
> Checking advanced syscall emulation patch for ptrace...OK
> Checking for tmpfs mount on /dev/shm...OK
> Checking PROT_EXEC mmap in /dev/shm/...OK
> Checking for the skas3 patch in the host:
>   - /proc/mm...not found
>   - PTRACE_FAULTINFO...not found
>   - PTRACE_LDT...not found
> UML running in SKAS0 mode
> Checking that ptrace can change system call numbers...OK
> Checking syscall emulation patch for ptrace...OK
> Checking advanced syscall emulation patch for ptrace...OK
>
> Just down to this step, and not any response next...
>
> I guessed maybe the kernel of UML didn't support the XATTR  of filesystem
> and then I reconfigured the UML and set EXT2_XATTR, EXT2_FS_SECURITY,
> EXT3_XATTR, EXT3_FS_SECURITY to "Y".
This wouldn't matter, since UML is using hostfs (which does not support XATTR 
at all, to my knowledge) and not ext2/ext3.
> But after I recompiled the kernel of 
> UML and run it,  I  was given the same  message mentioned above.
>
> What should do  next?   Could anybody  give me some advices?

There are few reasons usually for using hostfs, normally using a dedicated 
root_fs is a better solution. And using hostfs on your / can cause trouble to 
both your host and your guest (well, if you boot with init=/bin/sh then there 
are less problems).
-- 
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
Chiacchiera con i tuoi amici in tempo reale! 
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