Arch Linux User Repository

This package have several variables to enable/disable features.

##
## The following variables can be customized at build time. Use env or export to change at your wish
##
##   Example: env _microarchitecture=98 use_numa=n use_tracers=n makepkg -sc
##
## Look inside 'choose-gcc-optimization.sh' to choose your microarchitecture
## Valid numbers between: 0 to 99
## Default is: 0 => generic
## Good option if your package is for one machine: 98 (Intel native) or 99 (AMD native)
if [ -z ${_microarchitecture+x} ]; then
  _microarchitecture=0
fi

## Disable NUMA since most users do not have multiple processors. Breaks CUDA/NvEnc.
## Archlinux and Xanmod enable it by default.
## Set variable "use_numa" to: n to disable (possibly increase performance)
##                             y to enable  (stock default)
if [ -z ${use_numa+x} ]; then
  use_numa=y
fi

## Since upstream disabled CONFIG_STACK_TRACER (limits debugging and analyzing of the kernel)
## you can enable them setting this option. Caution, because they have an impact in performance.
## Stock Archlinux has this enabled. 
## Set variable "use_tracers" to: n to disable (possibly increase performance, XanMod default)
##                                y to enable  (Archlinux default)
if [ -z ${use_tracers+x} ]; then
  use_tracers=n
fi

# Unique compiler supported upstream is GCC
## Choose between GCC and CLANG config (default is GCC)
## Use the environment variable "_compiler=clang"
if [ "${_compiler}" = "clang" ]; then
  _compiler_flags="CC=clang HOSTCC=clang LLVM=1 LLVM_IAS=1"
fi

# Choose between the 4 main configs for stable branch. Default x86-64-v1 which use CONFIG_GENERIC_CPU2:
# Possible values: config_x86-64-v1 (default) / config_x86-64-v2 / config_x86-64-v3 / config_x86-64-v4
# This will be overwritten by selecting any option in microarchitecture script
# Source files: https://github.com/xanmod/linux/tree/5.17/CONFIGS/xanmod/gcc
if [ -z ${_config+x} ]; then
  _config=config_x86-64-v1
fi

# Compress modules with ZSTD (to save disk space)
if [ -z ${_compress_modules+x} ]; then
  _compress_modules=n
fi

# Compile ONLY used modules to VASTLY reduce the number of modules built
# and the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD read the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
if [ -z ${_localmodcfg} ]; then
  _localmodcfg=n
fi

# Tweak kernel options prior to a build via nconfig
if [ -z ${_makenconfig} ]; then
  _makenconfig=n
fi

Personally I'm running now xanmod kernel compiled with this:

env _microarchitecture=98 use_tracers=n use_numa=n _localmodcfg=y _compress_modules=y makepkg -sic

Also, you can now create the file myconfig in your local repo to build this package with a custom config or use ${XDG_CONFIG_HOME}/linux-xanmod/myconfig. This file can be a full kernel config or be a script with several entries to add/remove options (you have several examples in PKGBUILD by using scripts/config):

Code involved:

  for _myconfig in "${SRCDEST}/myconfig" "${HOME}/.config/linux-xanmod/myconfig" "${XDG_CONFIG_HOME}/linux-xanmod/myconfig" ; do
    if [ -f "${_myconfig}" ] && [ "$(wc -l <"${_myconfig}")" -gt "0" ]; then
      if grep -q 'scripts/config' "${_myconfig}"; then
        # myconfig is a partial file. Executing as a script
        msg2 "Applying myconfig..."
        bash -x "${_myconfig}"
      else
        # myconfig is a full config file. Replacing default .config
        msg2 "Using user CUSTOM config..."
        cp -f "${_myconfig}" .config
      fi
      echo
      break
    fi
  done

@mabod PDS is not merged to XanMod as far as I know. I will replace this setting by Cachy (CONFIG_CACHY_SCHED):

https://github.com/xanmod/linux/blob/5.8/Documentation/scheduler/sched-Cachy.rst

Edit: Cachy done.

I can not get PDS scheduler to be included.

I create the package with :

use_pds=y makepkg -f

it shows the output:

-> Enabling PDS CPU scheduler by default...

But the .config does not contain the CONFIG_SCHED_PDS option

28# grep PDS config.last
CONFIG_APDS9802ALS=m
CONFIG_SENSORS_APDS990X=m
CONFIG_APDS9300=m
CONFIG_APDS9960=m

@Sourav you can compile this package using "env use_ns=y makepkg" or "env use_ns=no makepkg". See PKGBUILD for more information

By default "CONFIG_USER_NS_UNPRIVILEGED" is disabled in this kernel. So Nautilus's thumbnailer won't work with bubblewrap. Follow here:

https://wiki.archlinux.org/index.php/GNOME/Files#Thumbnails

@IsNoGood you have to import GPG key to verify the sources. Open a shell with the build user, and import it, for example:

$ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 38DBBDC86092693E

Get pgp verification error on build Building linux-xanmod... ==> Making package: linux-xanmod 5.8.6-1 (Пн 07 сен 2020 21:31:42) ==> Checking runtime dependencies... ==> Checking buildtime dependencies... ==> Retrieving sources... -> Found linux-5.8.tar.xz -> Found linux-5.8.tar.sign -> Found patch-5.8.6-xanmod1.xz -> Found choose-gcc-optimization.sh -> Found 0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-CLONE_NEWUSER.patch ==> Validating source files with sha256sums... linux-5.8.tar.xz ... Passed linux-5.8.tar.sign ... Skipped patch-5.8.6-xanmod1.xz ... Passed choose-gcc-optimization.sh ... Passed 0001-ZEN-Add-sysctl-and-CONFIG-to-disallow-unprivileged-CLONE_NEWUSER.patch ... Passed ==> Verifying source file signatures with gpg... linux-5.8.tar ... FAILED (unknown public key 38DBBDC86092693E) ==> ERROR: One or more PGP signatures could not be verified! Failed to build linux-xanmod

@rdslw done 7d26f7d99bc6

yeah @figue, "5.8.5-xanmod1-1" would be perfect.

I'm not sure how PKGBASE being for now "linux-xanmod" during prep phase, later translates in adding just 'xanmod' inside of "5.8.5-xanmod1-xanmod-1", but if this change results in 5.8.5-xanmod1-1 I think would be perfect :)

@rdslw I don't consider that an "issue". But if you find how remove the last "xanmod", I will apply the "fix" ;)

Edit: Something like this?

figue@pluto ~/packages-figue/linux-xanmod
 % uname -a
Linux pluto 5.8.5-xanmod1-1 #1 SMP PREEMPT Tue, 01 Sep 2020 01:00:15 +0000 x86_64 GNU/Linux

diff --git a/PKGBUILD b/PKGBUILD
index 46ffd46..da4c953 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -118,7 +118,7 @@ prepare() {
   msg2 "Setting version..."
   scripts/setlocalversion --save-scmversion
   echo "-$pkgrel" > localversion.10-pkgrel
-  echo "${pkgbase#linux}" > localversion.20-pkgname
+  echo "${pkgbase#linux-xanmod}" > localversion.20-pkgname

   # Archlinux patches
   local src

How can we fix 'xanmod' being duplicated in uname -r ?

Currently it shows 5.8.5-xanmod1-xanmod-1