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====== How to work with kernel-autobuild ======

===== installation =====

* add to ''/etc/apt/sources.list'': ''<nowiki>deb http://ftp.lihas.de/debian stable main</nowiki>''
  * ''wget -O - <nowiki>http://ftp.lihas.de/debian/apt-key-lihas.gpg | apt-key add -</nowiki>''
  * ''apt-get update''
  * ''apt-get install kernel-autobuild''

* I recommend creating two or more 100GB logical volumes
    * one for general usage
    * one for the kernel release to build
<code>
	VG=$(vgs | awk 'NR==2 { print $1 }')
	lvcreate $VG -n kernel-autobuild    -L 100G
	lvcreate $VG -n kernel-autobuild34  -L 100G
	lvcreate $VG -n kernel-autobuild310 -L 100G

mkfs -t ext4 /dev/$VG/kernel-autobuild
	mkfs -t ext4 /dev/$VG/kernel-autobuild34
	mkfs -t ext4 /dev/$VG/kernel-autobuild310

echo "/dev/$VG/kernel-autobuild    /var/lib/kernel-autobuild      ext4 noatime,nodiratime 0 0" >> /etc/fstab
	echo "/dev/$VG/kernel-autobuild34  /var/lib/kernel-autobuild-3.4  ext4 noatime,nodiratime 0 0" >> /etc/fstab
	echo "/dev/$VG/kernel-autobuild310 /var/lib/kernel-autobuild-3.10 ext4 noatime,nodiratime 0 0" >> /etc/fstab

mkdir /var/lib/kernel-autobuild
	mount /var/lib/kernel-autobuild

mkdir /var/lib/kernel-autobuild-3.4
	mount /var/lib/kernel-autobuild-3.4

mkdir /var/lib/kernel-autobuild-3.10
	mount /var/lib/kernel-autobuild-3.10
</code>

* next, you need a kvm template image. here is the rough sketch:

<code>
mkdir /var/lib/kernel-autobuild/00-resources
cd /var/lib/kernel-autobuild/00-resources
dd if=/dev/zero of=wheezy-kerneltest.img bs=1024k count=1024
/sbin/fdisk wheezy-kerneltest.img << EOF
x
c
130
r
n
p
1

+800M
n
p
2

a
1
t
2
82
w
EOF
fdisk -l wheezy-kerneltest.img
#                  Device Boot      Start         End      Blocks   Id  System
# wheezy-kerneltest.img1   *        2048     1640447      819200   83  Linux
# wheezy-kerneltest.img2         1640448     2097151      228352   82  Linux swap / Solaris
KPARTX_OUT=$( kpartx -av wheezy-kerneltest.img )
PART=$( awk '{ print "PART" NR "=/dev/mapper/" $3 }' <<< "$KPARTX_OUT" )
echo $PART
# PART1=/dev/mapper/loop0p1 PART2=/dev/mapper/loop0p2
eval $PART
mkfs -t ext3 $PART1
mkswap $PART2

# install virtual engine using dhcp/tftp bootserver:
kvm -M pc -net nic,macaddr=66:66:66:66:66:15,model=rtl8139 -net tap,script=/etc/kvm/kvm-ifup wheezy-kerneltest.img -name wheezy-kerneltest -k de -boot n -vnc :2 &
vncviewer :2
# coming up: debian-basis-installation
# language: US-English
# keyboard: doesn't matter. just make sure it matches the kvm command ("-k de") line above
# everything in one disk (/dev/sda1)
# inside kvm f. Debian 8 / jessie:
# - get rid of systemd:
#   cat << EOF > /etc/apt/preferences.d/sysv
#   Package: systemd-sysv
#   Pin: release o=Debian
#   Pin-Priority: -1
#   EOF
# apt-get update
# apt-get install sysvinit-core
# </debian-jessie>
# inside kvm: apt-get clean
# inside kvm: dd if=/dev/zero of=/tmp/null ; rm /tmp/null
kpartx -dv wheezy-kerneltest.img
# results in 150MB out of 1GB in 1:30 min (i7-4770 @3.4GHz, 32GB):
pxz -M 1G -9 wheezy-kerneltest.img
</code>

* your /etc/kernel-autobuild.xml might look like this

* patch-scripts-package-builddeb-v3.4.85+.diff

<code>
base64 -d << EOBASE64 | gunzip > /var/lib/kernel-autobuild/3.4/00-resources/patch-scripts-package-builddeb-v3.4.85+.diff; chmod 644 /var/lib/kernel-autobuild/3.4/00-resources/patch-scripts-package-builddeb-v3.4.85+.diff
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EOBASE64
</code>

* patch-scripts-package-builddeb-v3.10.35+.diff

<code>
base64 -d << EOBASE64 | gunzip > /var/lib/kernel-autobuild/3.10/00-resources/patch-scripts-package-builddeb-v3.10.35+.diff; chmod 644 /var/lib/kernel-autobuild/3.10/00-resources/patch-scripts-package-builddeb-v3.10.35+.diff
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AA==
EOBASE64
</code>

* run ''kernel-autobuild --template 3.10'' or ''kernel-autobuild --template 3.4''

===== build kernel 4.1.21 (Tue Apr 19 09:56:09 CEST 2016) =====

<code>
kernel-autobuild --kernel-base-version 4.1  --config /var/lib/kernel-autobuild/4.1/00-resources/config-4.2.0-0.bpo.1-amd64-debian-jessie-bpo --vspatch-url-template 'http://vserver.13thfloor.at/Experimental/patch-4.1.18-vs\${PVER}.diff' --pver "2.3.8.4" --dotconfig-setting EXT4_FS=y,EXT4_ENCRYPTION=y --template 4.1
</code>

===== build kernel 4.1.24 (Thu May 12 15:19:44 CEST 2016) =====

<code>
/usr/bin/kernel-autobuild  --kernel-base-version  4.1  --config  /var/lib/kernel-autobuild/4.1/00-resources/config-4.2.0-0.bpo.1-amd64-debian-jessie-bpo  --vspatch-url-template  'http://vserver.13thfloor.at/Experimental/patch-4.1.18-vs\${PVER}.diff'  --pver  "2.3.8.4"  --dotconfig-setting  "EXT4_FS=y,EXT4_ENCRYPTION=y,UEVENT_HELPER_PATH'\"\"'"  --template  4.1
</code>

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