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[Boot] Add option to set loops per jiffies, reducing boot time

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This commit is contained in:
Antoine Viallon 2022-04-08 21:11:14 +02:00
parent 2f4e012e0c
commit a6660555cf
Signed by: aviallon
GPG key ID: 186FC35EDEB25716
1 changed files with 11 additions and 0 deletions
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11
boot.nix
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@ -73,6 +73,13 @@ in
type = types.int; type = types.int;
}; };
loops_per_jiffies = mkOption {
description = "Set loops_per_jiffies to given constant, reducing boot-time. A value of 0 means autodetection.";
default = 0;
example = 4589490;
type = types.addCheck types.int (v: v > 500);
};
cmdline = mkOption { cmdline = mkOption {
description = "Kernel params as attributes (instead of list)"; description = "Kernel params as attributes (instead of list)";
default = { }; default = { };
@ -88,6 +95,10 @@ in
aviallon.boot.cmdline = { aviallon.boot.cmdline = {
"syscall.x32" = cfg.x32abi.enable; "syscall.x32" = cfg.x32abi.enable;
# Sets loops_per_jiffy to given constant, thus avoiding time-consuming boot-time autodetection
# https://www.kernel.org/doc/html/v5.15/admin-guide/kernel-parameters.html
"lpj" = cfg.loops_per_jiffies;
}; };
boot = { boot = {