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linux kernel: prefer zstd where possible

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Closes #302291
Closes #301536

The following things have changed:

* For 5.7+: ZSWAP compressor uses zstd now.
* For 5.11+: ZRAM compressor uses zstd now.
* For 5.13+: kernel modules are compressed with zstd instead of xz.
* For 5.19+: support zstd-compressed firmware.

The modules-closure functionality needed explicit support for copying
over `.zst` files. Also, the VM image builder used busybox's `insmod`
before which doesn't support zstd. Switched to `kmod` and added xz/zstd
as dependencies for it, similar to how it's done for the actual stage1
in d33e52b253. The use of `kmod` here
doesn't seem to be such a big deal since it's only a build-time
dependency.
This commit is contained in:
Maximilian Bosch 2024-04-07 10:33:57 +02:00
parent 1a2d905c2c
commit 378177d269
No known key found for this signature in database
3 changed files with 22 additions and 9 deletions
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2
pkgs/build-support/kernel/modules-closure.sh
View file

@ -80,7 +80,7 @@ for module in $(< ~-/closure); do
# of its output.
modinfo -b $kernel --set-version "$version" -F firmware $module | grep -v '^name:' | while read -r i; do
echo "firmware for $module: $i"
for name in "$i" "$i.xz" ""; do
for name in "$i" "$i.xz" "$i.zst" ""; do
[ -z "$name" ] && echo "WARNING: missing firmware $i for module $module"
if cp -v --parents --no-preserve=mode lib/firmware/$name "$out" 2>/dev/null; then
break

9
pkgs/build-support/vm/default.nix
View file

@ -40,10 +40,14 @@ rec {
${pkgs.stdenv.cc.libc}/lib/libc.so.* \
${pkgs.stdenv.cc.libc}/lib/libm.so.* \
${pkgs.stdenv.cc.libc}/lib/libresolv.so.* \
${pkgs.stdenv.cc.libc}/lib/libpthread.so.* \
${pkgs.zstd.out}/lib/libzstd.so.* \
${pkgs.xz.out}/lib/liblzma.so.* \
$out/lib
# Copy BusyBox.
cp -pd ${pkgs.busybox}/bin/* $out/bin
cp -pd ${pkgs.kmod}/bin/* $out/bin
# Run patchelf to make the programs refer to the copied libraries.
for i in $out/bin/* $out/lib/*; do if ! test -L $i; then nuke-refs $i; fi; done
@ -54,6 +58,11 @@ rec {
patchelf --set-interpreter $out/lib/ld-*.so.? --set-rpath $out/lib $i || true
fi
done
find $out/lib -type f \! -name 'ld*.so.?' | while read i; do
echo "patching $i..."
patchelf --set-rpath $out/lib $i
done
''; # */

20
pkgs/os-specific/linux/kernel/common-config.nix
View file

@ -871,12 +871,14 @@ let
};
zram = {
ZRAM = module;
ZRAM_WRITEBACK = option yes;
ZRAM_MULTI_COMP = whenAtLeast "6.2" yes;
ZSWAP = option yes;
ZPOOL = yes;
ZBUD = option yes;
ZRAM = module;
ZRAM_WRITEBACK = option yes;
ZRAM_MULTI_COMP = whenAtLeast "6.2" yes;
ZRAM_DEF_COMP_ZSTD = whenAtLeast "5.11" yes;
ZSWAP = option yes;
ZSWAP_COMPRESSOR_DEFAULT_ZSTD = whenAtLeast "5.7" yes;
ZPOOL = yes;
ZSMALLOC = option yes;
};
brcmfmac = {
@ -948,8 +950,9 @@ let
THRUSTMASTER_FF = yes;
ZEROPLUS_FF = yes;
MODULE_COMPRESS = whenOlder "5.13" yes;
MODULE_COMPRESS_XZ = yes;
MODULE_COMPRESS = whenOlder "5.13" yes;
MODULE_COMPRESS_XZ = whenOlder "5.13" yes;
MODULE_COMPRESS_ZSTD = whenAtLeast "5.13" yes;
SYSVIPC = yes; # System-V IPC
@ -1124,6 +1127,7 @@ let
FW_LOADER_USER_HELPER_FALLBACK = option no;
FW_LOADER_COMPRESS = whenAtLeast "5.3" yes;
FW_LOADER_COMPRESS_ZSTD = whenAtLeast "5.19" yes;
HOTPLUG_PCI_ACPI = yes; # PCI hotplug using ACPI
HOTPLUG_PCI_PCIE = yes; # PCI-Expresscard hotplug support