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Merge pull request #111462 from jakobrs/msize

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nixos/qemu-vm: add virtualisation.msize option
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WORLDofPEACE 2021-02-25 21:06:27 -05:00 committed by GitHub
commit 1546bea850
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1 changed files with 15 additions and 3 deletions
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18
nixos/modules/virtualisation/qemu-vm.nix
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@ -277,6 +277,18 @@ in
'';
};
virtualisation.msize =
mkOption {
default = null;
type = types.nullOr types.ints.unsigned;
description =
''
msize (maximum packet size) option passed to 9p file systems, in
bytes. Increasing this should increase performance significantly,
at the cost of higher RAM usage.
'';
};
virtualisation.diskSize =
mkOption {
default = 512;
@ -666,7 +678,7 @@ in
${if cfg.writableStore then "/nix/.ro-store" else "/nix/store"} =
{ device = "store";
fsType = "9p";
options = [ "trans=virtio" "version=9p2000.L" "cache=loose" ];
options = [ "trans=virtio" "version=9p2000.L" "cache=loose" ] ++ lib.optional (cfg.msize != null) "msize=${toString cfg.msize}";
neededForBoot = true;
};
"/tmp" = mkIf config.boot.tmpOnTmpfs
@ -679,13 +691,13 @@ in
"/tmp/xchg" =
{ device = "xchg";
fsType = "9p";
options = [ "trans=virtio" "version=9p2000.L" ];
options = [ "trans=virtio" "version=9p2000.L" ] ++ lib.optional (cfg.msize != null) "msize=${toString cfg.msize}";
neededForBoot = true;
};
"/tmp/shared" =
{ device = "shared";
fsType = "9p";
options = [ "trans=virtio" "version=9p2000.L" ];
options = [ "trans=virtio" "version=9p2000.L" ] ++ lib.optional (cfg.msize != null) "msize=${toString cfg.msize}";
neededForBoot = true;
};
} // optionalAttrs (cfg.writableStore && cfg.writableStoreUseTmpfs)