5276ebb5ee
It was introduced inc10fe14but removed inc4f910f. It remained such that people with older generations in their boot entries could still boot those. Given that the parameter hasn't had any use in quite some years, it seems safe to remove now. Fixes #60184
76 lines
2 KiB
Nix
76 lines
2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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crashdump = config.boot.crashDump;
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kernelParams = concatStringsSep " " crashdump.kernelParams;
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in
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###### interface
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{
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options = {
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boot = {
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crashDump = {
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enable = mkOption {
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type = types.bool;
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default = false;
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description = ''
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If enabled, NixOS will set up a kernel that will
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boot on crash, and leave the user in systemd rescue
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to be able to save the crashed kernel dump at
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/proc/vmcore.
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It also activates the NMI watchdog.
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'';
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};
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reservedMemory = mkOption {
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default = "128M";
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type = types.str;
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description = ''
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The amount of memory reserved for the crashdump kernel.
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If you choose a too high value, dmesg will mention
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"crashkernel reservation failed".
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'';
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};
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kernelParams = mkOption {
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type = types.listOf types.str;
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default = [ "1" "boot.shell_on_fail" ];
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description = ''
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Parameters that will be passed to the kernel kexec-ed on crash.
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'';
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};
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};
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};
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};
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###### implementation
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config = mkIf crashdump.enable {
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boot = {
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postBootCommands = ''
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echo "loading crashdump kernel...";
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${pkgs.kexectools}/sbin/kexec -p /run/current-system/kernel \
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--initrd=/run/current-system/initrd \
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--reset-vga --console-vga \
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--command-line="init=$(readlink -f /run/current-system/init) irqpoll maxcpus=1 reset_devices ${kernelParams}"
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'';
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kernelParams = [
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"crashkernel=${crashdump.reservedMemory}"
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"nmi_watchdog=panic"
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"softlockup_panic=1"
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];
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kernelPatches = [ {
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name = "crashdump-config";
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patch = null;
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extraConfig = ''
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CRASH_DUMP y
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DEBUG_INFO y
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PROC_VMCORE y
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LOCKUP_DETECTOR y
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HARDLOCKUP_DETECTOR y
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'';
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} ];
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};
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};
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}
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