hello,

i would like to give xen a try, but i didn't manage to compile a dom0
host kernel yet.

that's because i would like to use a recent linux kernel (2.6.20 at
least), build it the debian way (with make-kpkg), and as well build
some external modules (nvidia-legacy-96xx, ivtv) with module-assistent
for it.

in irc (#xen or ##xen) i was told to use the ubuntu linux-source-2.6.22
2.6.22-10.30 package, and according to the changelog it should contain
xen patches, but unfortunately a 'make menuconfig' in the sources didn't
give any xen options in 'processor-type and features'.

so how do you compile a xen dom0 host-kernel? is it possible with recent
kernel sources, and where do i find the corresponding xen patches?

thanks in advance,
jonas

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Hi Jonas,

On Fri, Sep 07, 2007 at 04:33:43AM +0200, Jonas Meurer wrote:
>
> hello,
>
> i would like to give xen a try, but i didn't manage to compile a dom0
> host kernel yet.

Do you need to? What is wrong with Debian's xen kernels?

> that's because i would like to use a recent linux kernel (2.6.20 at
> least), build it the debian way (with make-kpkg), and as well build
> some external modules (nvidia-legacy-96xx, ivtv) with module-assistent
> for it.

You can't use a kernel.org kernel, as the xen feature is a patch
developed external to the mainline kernel.

You can use the normal Debian kernel source and compile like you
would normally, making sure to select the xen patch.

This will result in a kernel you can use with module-assistant. But
you can use module-assistant with the stock debian xen kernel so I
am not clear as tp why you need to do this.

> so how do you compile a xen dom0 host-kernel? is it possible with recent
> kernel sources, and where do i find the corresponding xen patches?

They come with Debian's kernel source.

Cheers,
Andy

--
http://bitfolk.com/ -- No-nonsense VPS hosting
Encrypted mail welcome - keyid 0x604DE5DB

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On 09/09/2007 Andy Smith wrote:
> Hi Jonas,

Hey Andi,

> > i would like to give xen a try, but i didn't manage to compile a dom0
> > host kernel yet.
>
> Do you need to? What is wrong with Debian's xen kernels?

I don't think that there's anything wrong with debian's default kernels,
but I always use a selfcompiled kernel, and I'dd like to learn howto
compile a xen dom0 kernel as well.

Additionally it seems like current debian/unstable has no precompiled
xen dom0 linux-images, at least for amd64 (x86_64):

# apt-cache search linux-image | grep xen
#

> > that's because i would like to use a recent linux kernel (2.6.20 at
> > least), build it the debian way (with make-kpkg), and as well build
> > some external modules (nvidia-legacy-96xx, ivtv) with module-assistent
> > for it.
>
> You can't use a kernel.org kernel, as the xen feature is a patch
> developed external to the mainline kernel.

That's clear, but I could use a kernel.org kernel and patch it with the
corresponding xen patch, right?

> You can use the normal Debian kernel source and compile like you
> would normally, making sure to select the xen patch.

Unfortunately, this simply doesn't work. If I run 'make menuconfig' in
debians linux-source-2.6.22 sources, I don't get any xen options in
the submenu 'processor-type and features'.

> > so how do you compile a xen dom0 host-kernel? is it possible with recent
> > kernel sources, and where do i find the corresponding xen patches?
>
> They come with Debian's kernel source.

Then maybe they come only for i386? As already written, on my amd64
system, I cannot find any xen options in debians linux-source-2.6.22.

greetings,
jonas

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Hi Jonas,

On Sun, Sep 09, 2007 at 03:03:09PM +0200, Jonas Meurer wrote:
> On 09/09/2007 Andy Smith wrote:
> > Hi Jonas,
>
> Hey Andi,
>
> > > i would like to give xen a try, but i didn't manage to compile a dom0
> > > host kernel yet.
> >
> > Do you need to? What is wrong with Debian's xen kernels?
>
> I don't think that there's anything wrong with debian's default kernels,
> but I always use a selfcompiled kernel, and I'dd like to learn howto
> compile a xen dom0 kernel as well.

Okay. Well It has been a long time (6 months+) since I did this as
these days the stock debian xen kernels are fine for me, but..

> > You can use the normal Debian kernel source and compile like you
> > would normally, making sure to select the xen patch.
>
> Unfortunately, this simply doesn't work. If I run 'make menuconfig' in
> debians linux-source-2.6.22 sources, I don't get any xen options in
> the submenu 'processor-type and features'.

So you have also installed linux-patch-debian-* and then done:

$ sudo make-kpkg --added-patches xen clean
$ sudo make-kpkg --added-patches xen kernel-image

?

Also back when I did it, this bug was present and needed the
described workaround:

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=382699

That is what I mean by "making sure to select the xen patch". It's
the same process as used for making your own linux-vserver kernel.

If you still have problems I would recommend the debian xen package
mailing list.

Cheers,
Andy

--
http://bitfolk.com/ -- No-nonsense VPS hosting
Encrypted mail welcome - keyid 0x604DE5DB

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On 09/09/2007 Andy Smith wrote:
> Hi Jonas,

Hi Andy,

> > > You can use the normal Debian kernel source and compile like you
> > > would normally, making sure to select the xen patch.
> >
> > Unfortunately, this simply doesn't work. If I run 'make menuconfig' in
> > debians linux-source-2.6.22 sources, I don't get any xen options in
> > the submenu 'processor-type and features'.
>
> So you have also installed linux-patch-debian-* and then done:
>
> $ sudo make-kpkg --added-patches xen clean
> $ sudo make-kpkg --added-patches xen kernel-image
>
> Also back when I did it, this bug was present and needed the
> described workaround:
>
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=382699

Yes, exactly. Actually I do have some more options to make-kpkg:

# make-kpkg --rootcmd fakeroot --initrd --append-to-version \
-1-amd64-xen --revision 2.6.22-4 --added-patches xen clean
# make-kpkg --rootcmd fakeroot --initrd --append-to-version \
-1-amd64-xen --revision 2.6.22-4 --added-patches xen kernel_image

And indeed some patches seem to be applied (see below). But i still
don't see any xen options in menuconfig. Maybe the 2.6.22 xen patches
are for i386 only and not ported to amd64 yet?
That would also explain why no linux-image-2.6.22-2-xen-amd64 package
exists in debian/unstable.

output of 'make-kpkg ... --added-patches xen kernel_image':

[...]
test ! -f applied_patches || rm -f applied_patches
for patch in /usr/src/kernel-patches/all/2.6.22/apply/xen ; do \
if test -x $patch; then \
if $patch; then \
echo "Patch $patch processed fine"; \
echo "$patch" >> applied_patches; \
else \
echo "Patch $patch failed."; \
echo "Hit return to Continue"; \
read ans; \
fi; \
fi; \
done
Applying debian patch with xen parts
Warning: Can't find series file for 3
(.) IGNORED bugfix/arm/nas100d-pata-artop-single-port.patch
(.) IGNORED bugfix/m68k/falconide_intr_lock-reentrant.diff
(.) IGNORED bugfix/m68k/633-atari_scc.diff
(.) IGNORED bugfix/m68k/130-adbraw.diff
(.) IGNORED bugfix/m68k/141-ide.diff
(.) IGNORED bugfix/m68k/143-ioext.diff
(.) IGNORED bugfix/m68k/149-mc68681.diff
(.) IGNORED bugfix/m68k/152-pci.diff
(.) IGNORED bugfix/m68k/448-ide.diff
(.) IGNORED bugfix/m68k/478-serial.diff
(.) IGNORED bugfix/m68k/atari-rom-isa.diff
(.) IGNORED bugfix/m68k/atari-ethernec.diff
(.) IGNORED bugfix/m68k/unnecessary-m68k_memoffset.diff
(.) IGNORED bugfix/m68k/atari-aranym.diff
(.) IGNORED bugfix/m68k/ethernec-work.diff
(.) IGNORED bugfix/m68k/nfeth-virt_to_phys.diff
(.) IGNORED bugfix/m68k/ethernec-kill-ETHERNEC_USE_POLL.diff
(.) IGNORED bugfix/m68k/m68k-generic-io.diff
(.) IGNORED bugfix/m68k/m68k-mvme-scsi-rename.diff
(.) IGNORED bugfix/m68k/m68k-53c700-scsi.diff
(.) IGNORED bugfix/m68k/via-pmu68k-dead-code.diff
(.) IGNORED bugfix/m68k/dmasound_paula.diff
(.) IGNORED bugfix/m68k/disable-mac-broken-config-options.diff
--> 1 fully applied.
(.) IGNORED bugfix/m68k/falconide_intr_lock-reentrant.diff
(.) IGNORED bugfix/m68k/m68k-page.h-needs-compiler.h.diff
(.) IGNORED bugfix/m68k/630-extern-cleanup.diff.1
(.) IGNORED bugfix/m68k/m68k-use-_AC.diff
(.) IGNORED bugfix/m68k/m68k-amiga-z2ram-kill-TRUE-FALSE.diff
(.) IGNORED bugfix/m68k/add-termios2.diff
(.) IGNORED bugfix/m68k/m68k-arbitary-speed-tty-support.diff
(.) IGNORED bugfix/m68k/m68k-do-not-include-RODATA-in-text-segment.diff
(.) IGNORED bugfix/m68k/m68k-53c700-cleanups.diff
(.) IGNORED bugfix/m68k/split-amiga7xx.diff
(.) IGNORED bugfix/m68k/m68k-scsi-Kconfig-hickups.diff
(.) IGNORED bugfix/m68k/zorro_config_attr-read-only.diff
(.) IGNORED bugfix/m68k/zorro-module-device-table.diff
(.) IGNORED bugfix/m68k/falconide_intr_lock-ratelimit.diff
(.) IGNORED bugfix/m68k/debian-2.6.21-2-rom-isa.diff
--> 2 fully applied.
(.) IGNORED features/all/vserver/vs2.2.0.3.patch
(.) IGNORED features/all/vserver/bindmount-dev.patch
--> 4 fully applied.
Patch /usr/src/kernel-patches/all/2.6.22/apply/xen processed fine
echo done > stamp-patch

[...]

greetings,
jonas

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