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author | Alyssa Ross <hi@alyssa.is> | 2023-05-08 12:07:29 +0000 |
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committer | Alyssa Ross <hi@alyssa.is> | 2023-05-09 14:15:10 +0000 |
commit | e5e49df7fd02afb7cbf35f713ebcb9ded02ce1b4 (patch) | |
tree | 390efd4cc0e5c37276c2552ba6379cdc0f789019 /nixos/modules/installer | |
parent | 096cdeeac406a12886f49eeadd48fd938d28c156 (diff) |
nixos/netboot: add squashfsCompression option
This is copied from isoImage.squashfsCompression. It's useful to be able to customise, as iteration cycles are very slow with xz, and subjectively systems booted with less efficiently compressed squashfs stores appear to have faster reads (although I didn't test that scientificly so there could be other factors).
Diffstat (limited to 'nixos/modules/installer')
-rw-r--r-- | nixos/modules/installer/netboot/netboot.nix | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/nixos/modules/installer/netboot/netboot.nix b/nixos/modules/installer/netboot/netboot.nix index 03bb529cd8510..a55c0ab2d6557 100644 --- a/nixos/modules/installer/netboot/netboot.nix +++ b/nixos/modules/installer/netboot/netboot.nix @@ -8,6 +8,20 @@ with lib; { options = { + netboot.squashfsCompression = mkOption { + default = with pkgs.stdenv.hostPlatform; "xz -Xdict-size 100% " + + lib.optionalString isx86 "-Xbcj x86" + # Untested but should also reduce size for these platforms + + lib.optionalString isAarch "-Xbcj arm" + + lib.optionalString (isPower && is32bit && isBigEndian) "-Xbcj powerpc" + + lib.optionalString (isSparc) "-Xbcj sparc"; + description = lib.mdDoc '' + Compression settings to use for the squashfs nix store. + ''; + example = "zstd -Xcompression-level 6"; + type = types.str; + }; + netboot.storeContents = mkOption { example = literalExpression "[ pkgs.stdenv ]"; description = lib.mdDoc '' @@ -77,6 +91,7 @@ with lib; # Create the squashfs image that contains the Nix store. system.build.squashfsStore = pkgs.callPackage ../../../lib/make-squashfs.nix { storeContents = config.netboot.storeContents; + comp = config.netboot.squashfsCompression; }; |