[vserver] Re: Newer linux-vserver patches?

From: Tor Rune Skoglund <trs_at_swi.no>
Date: Sat 09 Apr 2016 - 09:19:03 BST
Message-ID: <5708BAF7.6030206@swi.no>

To answer my own question here in case it might help someone else: I
make this short writeup and also added the same info to the wiki. Please
feel free to correct and change.

******

As of april 2016 there is no current maintainer for linux-vserver
kernels on Gentoo. The Gentoo maintainers seem to have adapted a more
"aggressive" approach related to removing unmaintained Gentoo packages,
so they have deleted all "old" vserver pre-patched kernels from portage.
This means that one has to install the vserver patch manually.

However, this is a fairly simple process, depending on whether you find
a kernel source in portage that has an available linux-vserver kernel
patch also.

This is what you need to do:

Have a look at Bertl's kernel patches. These are found on
http://vserver.13thfloor.at/Experimental/ and named "patch-" + the
kernel version the patch applies for. ("Experimental" is slightly
misleading...)

You'll then have to find kernel sources for which there is a patch
available. Take a look into /usr/portage/sys-kernel/vanilla-sources/.
This is what I've got currently:

amd64 ~ # ls -l /usr/portage/sys-kernel/vanilla-sources/
totalt 228
-rw-r--r-- 1 portage portage 23681 april 6 17:34 ChangeLog
-rw-r--r-- 1 portage portage 104895 nov. 9 04:28 ChangeLog-2013
-rw-r--r-- 1 portage portage 43787 nov. 9 05:11 ChangeLog-2015
-rw-r--r-- 1 portage portage 11396 april 6 17:34 Manifest
-rw-r--r-- 1 portage portage 642 jan. 25 00:06 metadata.xml
-rw-r--r-- 1 portage portage 456 mars 17 10:58 vanilla-sources-3.10.101.ebuild
-rw-r--r-- 1 portage portage 456 mars 18 23:03 vanilla-sources-3.12.57.ebuild
-rw-r--r-- 1 portage portage 456 mars 17 10:58 vanilla-sources-3.14.65.ebuild
-rw-r--r-- 1 portage portage 456 april 6 12:49 vanilla-sources-3.18.30.ebuild
-rw-r--r-- 1 portage portage 456 april 1 12:31 vanilla-sources-3.2.79.ebuild
-rw-r--r-- 1 portage portage 456 mars 22 14:42 vanilla-sources-3.4.111.ebuild
-rw-r--r-- 1 portage portage 456 april 6 12:49 vanilla-sources-4.1.21.ebuild
-rw-r--r-- 1 portage portage 456 mars 17 10:58 vanilla-sources-4.4.6.ebuild
-rw-r--r-- 1 portage portage 456 mars 17 10:58 vanilla-sources-4.5.0.ebuild

Unfortunately, at this time of writing no patch exists for any of the
most recent kernels from that list.*If* it did, then install that
version and skip the next step and use the chosen kernel as the kernel
to install and patch later in this short writeup.

There is also a "gentoo-sources" kernel source alternative. These kernel
are slightly patched with Gentoo updates. However, it is my impression
that these kernels are not so heavily patched by Gentoo that they
couldn't accept the linux-vserver patch also.

Here is my Gentoo-sources:

amd64 ~ # ls -l /usr/portage/sys-kernel/gentoo-sources/
totalt 500
-rw-r--r-- 1 portage portage 36798 april 6 17:34 ChangeLog
-rw-r--r-- 1 portage portage 91971 nov. 9 04:28 ChangeLog-2007
-rw-r--r-- 1 portage portage 101665 nov. 9 04:28 ChangeLog-2012
-rw-r--r-- 1 portage portage 119486 nov. 9 05:11 ChangeLog-2015
-rw-r--r-- 1 portage portage 766 mars 17 00:18 gentoo-sources-3.10.101.ebuild
-rw-r--r-- 1 portage portage 757 jan. 24 12:50 gentoo-sources-3.10.95.ebuild
<...several kernels deleted to save space...>
-rw-r--r-- 1 portage portage 770 okt. 26 13:05 gentoo-sources-4.0.9.ebuild
-rw-r--r-- 1 portage portage 787 jan. 10 11:32 gentoo-sources-4.1.12.ebuild
-rw-r--r-- 1 portage portage 786 mars 21 12:45 gentoo-sources-4.1.15-r1.ebuild
-rw-r--r-- 1 portage portage 794 mars 18 19:57 gentoo-sources-4.1.20.ebuild
-rw-r--r-- 1 portage portage 794 april 6 15:49 gentoo-sources-4.1.21.ebuild
-rw-r--r-- 1 portage portage 793 mars 17 00:56 gentoo-sources-4.4.6.ebuild
-rw-r--r-- 1 portage portage 793 mars 29 14:53 gentoo-sources-4.5.0-r1.ebuild
-rw-r--r-- 1 portage portage 40428 april 6 17:34 Manifest
-rw-r--r-- 1 portage portage 705 jan. 25 00:06 metadata.xml

There is a match. http://vserver.13thfloor.at/Experimental/ has a patch
for 4.1.12, so let's install the 4.1.12 gentoo-sources and try the
linux-vserver patch on it.

amd64 ~ # emerge -v =sys-kernel/gentoo-sources-4.1.12

Then download the corresponding patch from 13thfloor and save it into
the same directory as the emerged kernel sources which in this case is
/usr/src/gentoo-sources-4.1.12 .

cd into that source directory and install the linux-vserver kernel patch:

amd64 ~ # cd /usr/src/linux-4.1.12-gentoo/

amd64 linux-4.1.12-gentoo # patch -p1 < patch-4.1.12-vs2.3.8.3.diff
patching file Documentation/vserver/debug.txt
patching file Makefile
Hunk #1 FAILED at 1.
1 out of 1 hunk FAILED -- saving rejects to file Makefile.rej
patching file arch/alpha/Kconfig
patching file arch/alpha/kernel/systbls.S
patching file arch/alpha/kernel/traps.c
patching file arch/arm/Kconfig
<...further output deleted...>

Hopefully there shouldn't be any serious rejects. The only reject I got
was the makefile itself. By looking at the .rej file, it is just the
EXTRAVERSION that failed since EXTRAVERSION is already set to "-gentoo"
by gentoo-sources. So you can rather just edit EXTRAVERSION line the
makefile manually to whatever you like or keep it as it is.

Makefile.rej:

--- Makefile 2015-10-29 09:20:01.000000000 +0000
+++ Makefile 2015-10-30 14:51:48.000000000 +0000
@@ -1,7 +1,7 @@
  VERSION = 4
  PATCHLEVEL = 1
  SUBLEVEL = 12
-EXTRAVERSION =
+EXTRAVERSION = -vs2.3.8.3
  NAME = Series 4800
  
  # *DOCUMENTATION*

Then configure the kernel as you like using e.g. make menuconfig, then
make and make modules_install and install the kernel itself your usual way.

Den 30. mars 2016 17:12, skrev Tor Rune Skoglund:
> Hi List,
>
> I ran into an issue with network namespaces that seems to be fixed in a
> newer kernel (4.1.15) than the linux-3.18.7-vserver-2.3.7.4 which was
> included as the last one in Gentoo (until recently - as there is no
> Gentoo Vserver maintainer atm, that one also seem to be gone now).
>
> Anyway, any recommendation on patchset for newer kernels than the above?
>
> BR,
> Tor Rune Skoglund
>
Received on Sat Apr 9 14:18:03 2016

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