[uml-devel] [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 <stefano.melchior@openlabs.it>]

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Dear all,
there is a guy who submitted a bug related to the Debian linux-patch-skas
package: he affirmed to encouter problem in working with the host kernel
once compiled and patched SKAS. The host kernel release is reported in the
subject.
At the end of his analysis, he noticed this problem occurred only with AMD
Athlon 2200+, then with -k7 CPU type [*]: in particular with 2.6.18-5
compiled for K7 and patched with debian's linux-patch-skas (the same of
Blaisorblade's).

You can get details of the thread (a few mails) at the following link:
http://lists.alioth.debian.org/pipermail/pkg-uml-pkgs/2006-November/000438.html

Cheers

SteX

[*]
http://lists.alioth.debian.org/pipermail/pkg-uml-pkgs/2006-November/000481.html

----- Forwarded message from Stefano Melchior <stefano.melchior@openlabs.it> -----

Date: Fri, 24 Nov 2006 14:54:20 +0100
From: Stefano Melchior <stefano.melchior@openlabs.it>
To: "Peder Chr. N�rgaard" <pcn@pogt.dk>
Cc: Debian UML pkg Team <Pkg-uml-pkgs@lists.alioth.debian.org>
Subject: [Pkg-uml-pkgs] Re: Bug#399328: linux-patch-skas: user-mode-linux
	seems to not work on 2.6.18 patched with this package
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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

----- End forwarded message -----

-- 
Stefano Melchior, GPG key = D52DF829 - <stefano.melchior@openlabs.it>
http://www.openlabs.it/~stex    --     <stefano.melchior@openlabs.it>
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Skype ID "stefanomelchior"

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