[Pkg-uml-pkgs] Re: Bug#399328: linux-patch-skas: user-mode-linux seems to not work on 2.6.18 patched with this package

[Stefano Melchior]

On Sun, Nov 19, 2006 at 11:34:43AM +0100, Peder Chr.N�rgaard wrote:
Dear Peder,
> Package: linux-patch-skas
> Version: 3-2
> Severity: important
> 
> I apologize in advance if this should have been reported on
> user-mode-linux, or perhaps not at all, if it turns out to be my own
> fault.  But I don't know how to proceed.
> 
> User-mode-linux seems to run quite well on latest debian sid kernel,
> 2.6.18-2-686.  But I want to use the SKAS3 patch for speed and
> correctness, and have done so earlier with success (during 2005, with
> kernels 2.6.9/10/11/12).
> 
> This is how I build the modified kernel:
> 
> tar xfvj /usr/src/linux-source-2.6.18.tar.bz2
> 
> cd linux-source-2.6.18
> 
> cp /boot/config-2.6.18-2-686 .config
> 
> make-kpkg --append-to-version -pcn --subarch 686 --revision 1 --initrd --added-patches skas --config menuconfig --rootcmd fakeroot configure
> make-kpkg --append-to-version -pcn --subarch 686 --revision 1 --initrd --added-patches skas --config menuconfig --rootcmd fakeroot clean
> make-kpkg --append-to-version -pcn --subarch 686 --revision 1 --initrd --added-patches skas --config menuconfig --rootcmd fakeroot kernel-image
> 
> When this kernel is installed and user-mode-linux started (I start it
> from rootstrap) it correctly notes that SKAS3 is active:
> 
> 	:
> Checking for the skas3 patch in the host:
>   - /proc/mm...found
>   - PTRACE_FAULTINFO...found
>   - PTRACE_LDT...found
> UML running in SKAS3 mode
> 	:
> 
> but then it hangs at end of startup:
> 
> 	:
> Initializing software serial port version 1
>  ubda: unknown partition table
>  ubdb: unknown partition table
> VFS: Mounted root (hostfs filesystem) readonly.
> 
> where it hangs forever, spending all the CPU power available on the
> host system.  At this point, when using the official debian kernel,
> with no SKAS3, it would continue with
> 
> builder running...
> 
at first sigh it seems a problem related to rootstrap, not with
linux-patch-skas. To affirm it I need to investigate a bit more.
Did you test the just-compiled kernel (with SKAS patch)
with an pre-build uml instance to check if it works?
If I remember well you can find here, in http://uml.nagafix.co.uk/, some
uml instances. Anyway what is your rootstrap.conf configuration?

Cheers

SteX
-- 
Stefano Melchior, GPG key = D52DF829 - <stefano.melchior at openlabs.it>
http://www.openlabs.it/~stex    --     <stefano.melchior at openlabs.it>
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