Custom Linux kernels for Proxmox VE.

1. Linux 5.17
2. Linux 5.16

Older builds are still available at the Releases page.

First, set up our Debian repository on your Proxmox installation:

1. Add the repository's GPG key:

   curl -1sLf 'https://dl.cloudsmith.io/public/pve-edge/kernel/gpg.8EC01CCF309B98E7.key' | apt-key add -

2. Set up the pve-edge-kernel repository:
   If you are still on Proxmox VE 6, pick the Buster-based repository:

   echo "deb https://dl.cloudsmith.io/public/pve-edge/kernel/deb/debian buster main" > /etc/apt/sources.list.d/pve-edge-kernel.list

   If you are already on Proxmox VE 7, pick the Bullseye-based repository:

   echo "deb https://dl.cloudsmith.io/public/pve-edge/kernel/deb/debian bullseye main" > /etc/apt/sources.list.d/pve-edge-kernel.list

3. Install a kernel package:

   apt update
   apt install pve-kernel-5.16-edge

Package repository hosting is graciously provided by Cloudsmith. Cloudsmith is the only fully hosted, cloud-native, universal package management solution, that enables your organization to create, store and share packages in any format, to any place, with total confidence.

Alternatively, you may manually install the kernels. Select from the Releases page the kernel version you want to install and download the appropriate Debian package. Then, you can install the package as follows:

apt install ./pve-kernel-VERSION_amd64.deb

Previously, these kernels required changing the AppArmor feature file to a non-default version. This issue has been fixed since version 5.16. If you have used the workaround, please update back to the default configuration in /etc/apparmor/parser.conf as follows:

## Pin feature set (avoid regressions when policy is lagging behind
## the kernel) 
- compile-features=/usr/share/apparmor-features/features.stock
+ compile-features=/usr/share/apparmor-features/features

You may also choose to manually build one of these kernels yourself.

Make sure you have at least 10 GB of free space available and have the following packages installed:

apt install devscripts debhelper equivs git

In case you are building a kernel version >= 5.8, make sure you have installed at least dwarves >= 1.16.0. This version is currently is not available in the main repository. To work around this issue, we describe two options:

1. You may add the Debian Buster Backports repository to your APT sources as described here and install the newer dwarves package as follows:

   apt install -t buster-backports dwarves

2. Alternatively, you may download the newer dwarves (>= 1.16) package from the Debian website and install the package manually, for example:

   wget http://ftp.us.debian.org/debian/pool/main/d/dwarves-dfsg/dwarves_1.17-1_amd64.deb
   apt install ./dwarves_1.17-1_amd64.deb

Obtain the source code as follows:

git clone https://github.com/fabianishere/pve-edge-kernel
cd pve-edge-kernel

Then, select the branch of your likings (e.g. v5.10.x) and update the submodules:

git checkout v5.10.x
git submodule update --init --depth=1 --recursive linux
git submodule update --init --recursive

First, generate the Debian control file for your kernel by running the following in your command prompt:

debian/rules debian/control

Before we build, make sure you have installed the build dependencies:

sudo mk-build-deps -i

Invoking the following command will build the kernel and its associated packages:

debuild -ePVE* --jobs=auto -b -uc -us

The Makefile provides several environmental variables to control:

1. PVE_KERNEL_CC
   The compiler to use for the kernel build.
2. PVE_KERNEL_CFLAGS
   The compilation options to use for the kernel build. Use this variable to specify the optimization level or micro architecture to build for.

Kernel options may be controlled from debian/config/config.pve. To build with additional patches, you may add them to the debian/patches/pve directory and update the series file accordingly.

Questions, suggestions and contributions are welcome and appreciated! You can contribute in various meaningful ways:

• Report a bug through Github issues.
• Propose new patches and flavors for the project.
• Contribute improvements to the documentation.
• Provide feedback about how we can improve the project.