https://community.cloud.online.net/t/official-linux-kernel-new-modules-optimizations-hacks/226
The kernel is built with the official mainline kernel, here are the .config files used.
The list of Scaleway's bootscripts is available at http://devhub.scaleway.com/#/bootscripts.
We added kernel module to simulate some virtualization features:
- serial console activation
- remote soft reset trigger
You'll need the usual toolchain for kernel compilation, which on Ubuntu is generally fulfilled by apt-get install build-essential libssl-dev. Then, the following script can be run.
# Determine versions
arch="$(uname -m)"
release="$(uname -r)"
upstream="${release%%-*}"
local="${release#*-}"
# Get kernel sources
mkdir -p /usr/src
wget -O "/usr/src/linux-${upstream}.tar.xz" "https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-${upstream}.tar.xz"
tar xf "/usr/src/linux-${upstream}.tar.xz" -C /usr/src/
ln -fns "/usr/src/linux-${upstream}" /usr/src/linux
ln -fns "/usr/src/linux-${upstream}" "/lib/modules/${release}/build"
# Prepare kernel
zcat /proc/config.gz > /usr/src/linux/.config
printf 'CONFIG_LOCALVERSION="%s"\nCONFIG_CROSS_COMPILE=""\n' "${local:+-$local}" >> /usr/src/linux/.config
wget -O /usr/src/linux/Module.symvers "http://mirror.scaleway.com/kernel/${arch}/${release}/Module.symvers"
apt-get install -y libssl-dev # adapt to your package manager
make -C /usr/src/linux prepare modules_prepareThen you can make your module as usual by configuring KDIR=/lib/modules/$(uname -r)/build/
Alternatively, you can now build a DKMS-based kernel module, for instance: apt-get install zfsutils-linux
| Name | Maintainer | Sources | Target | Links |
|---|---|---|---|---|
| 3.2.34 | Marvell | Closed | C1 | n/a |
| 3.18.20 | Linux community | Open | C1 | Sources |
| 3.19.8 | Linux community | Open | C1 | Sources |
| 4.1.6 | Linux community | Open | C1 | Sources |
| 4.2 | Linux community | Open | C1 | Sources |
Run a make menuconfig for 3-18-std/.config
make menuconfig KERNEL=3.18-std
Build a kernel with 3.17-std/.config file
make build KERNEL=3.17-std
Create a new 3.10-new/.config file from scratch for kernel 3.10
make create defconfig KERNEL=3.10-new
Make oldconfig a 3.18-std kernel
make oldconfig KERNEL=3.18-std
Run a shell in the container for easy debugging and run custom commands
make shell KERNEL=3.17-std
You should use a config file made for versatile.
Build a 3.18 kernel for versatile:
make build KERNEL=3.18-defconfig_versatile
Run the kernel in qemu
make qemu KERNEL=3.18-defconfig_versatile
An example with 4.0.8-docker
You should move the directory
git mv 4.0.8-docker 4.0.9-docker
Run a make oldconfig with the newest version
make oldconfig KERNEL=4.0.9-docker
- An arm(hf) compiler:
- a cross-compiler on non-armhf host, ie
gcc-arm-linux-gnueabihf - a standard compiler from an armhf host (you can build a kernel from your C1)
- a cross-compiler on non-armhf host, ie
- Theses packages: git, wget, make
- Configure environment
export VERSION=3.17 export ARCH=arm export ARTIFACTS=artifacts
- Download archive via web
```bash
wget https://kernel.org/pub/linux/kernel/v3.x/linux-$VERSION.tar.xz && tar xf linux-$VERSION.tar.xz
or via git
git clone -b v$VERSION --single-branch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-$VERSION- Generate a base
.configfile by building it
make ARCH=arm mvebu_v7_defconfig
or by fetching our one
wget -O .config https://raw.githubusercontent.com/scaleway/kernel-tools/master/$VERSION/.config
- Tune the .config
```bash
make ARCH=arm menuconfig
# ... configure using console interface
- Building kernel and modules
make -j $(echo nproc ' * 2' | bc) uImage modules LOADADDR=0x8000
- Export the artifacts (kernel, header, modules) to `$ARTIFACTS` directory
```bash
mkdir -p $ARTIFACTS
cp arch/arm/boot/uImage $ARTIFACTS/
cp System.map $ARTIFACTS/
cp .config $ARTIFACTS/
make headers_install INSTALL_HDR_PATH=$ARTIFACTS/ > /dev/null
find $ARTIFACTS/include -name ".install" -or -name "..install.cmd" -delete
make modules_install INSTALL_MOD_PATH=$ARTIFACTS/ > /dev/null
rm -rf $ARTIFACTS/modules && \
mv $ARTIFACTS/lib/modules $ARTIFACTS && \
rmdir $ARTIFACTS/lib && \
rm $ARTIFACTS/modules/*/source $ARTIFACTS/modules/*/build
- Networking support
- Networking options
- 802.1Q/802.1ad VLAN Support -> **YES**
- Packet socket -> **YES**
- Unix domain sockets -> **YES**
- Device Drivers
- Network device support
- PHY Device support and infrastructure
- Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs -> **YES**
- Block devices
- Network block device support -> **YES**
- Kernel hacking
- Kernel low-level debugging functions -> **YES**
- Early prink -> **YES**
- File systems
- The Extended 4 (ext4) filesystem -> **YES**# It's an example to bump the kernels from 4.5.7 to 4.6.4
git mv x86_64/4.{5.7,6.4}-std
git mv x86_64/4.{5.7,6.4}-docker
git mv x86_64/4.{5.7,6.4}-apparmor
git mv x86_64/4.{5.7,6.4}-coreos
git mv x86_64/4.{5.7,6.4}-fedora
git mv x86_64/4.{5.7,6.4}-rancher
git mv armv7l/4.{5.7,6.4}-std
git mv armv7l/4.{5.7,6.4}-apparmor
git mv armv7l/4.{5.7,6.4}-debug
git mv armv7l/4.{5.7,6.4}-docker
git mv armv7l/4.{5.7,6.4}-fedora
for kernel in `find x86_64 -name "4.6.4-*"`; do make oldconfig KERNEL=$kernel; done
for kernel in `find armv7l -name "4.6.4-*"`; do make oldconfig KERNEL=$kernel; donegit mv x86_64/4.{5.7,6.4}-std
make oldconfig KERNEL=x86_64/4.6.4-std© 2014-2015 Scaleway - MIT License.
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