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33ed225a84
By default, they take the usual value of "50% of physical RAM". As /dev/shm can be filled by anyone, and tmpfs does not trigger the OOM killer (and can hang the machine due to a lack of RAM), I need to configure that down in order to avoid crashes. There is still left the /var/run/nscd tmpfs filesystem, also created with 50% of the RAM, but at least not writeable by anyone. We could find a reasonable low value for that, or allow configuration. svn path=/nixos/trunk/; revision=21140
69 lines
1.5 KiB
Nix
69 lines
1.5 KiB
Nix
{pkgs, config, ...}:
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let
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options = {
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boot = {
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postBootCommands = pkgs.lib.mkOption {
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default = "";
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example = "rm -f /var/log/messages";
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merge = pkgs.lib.mergeStringOption;
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description = ''
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Shell commands to be executed just before Upstart is started.
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'';
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};
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devSize = pkgs.lib.mkOption {
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default = "50%";
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example = "32m";
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description = ''
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Size limit for the /dev tmpfs. Look at mount(8), tmpfs size option,
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for the accepted syntax.
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'';
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};
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devShmSize = pkgs.lib.mkOption {
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default = "50%";
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example = "256m";
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description = ''
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Size limit for the /dev/shm tmpfs. Look at mount(8), tmpfs size option,
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for the accepted syntax.
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'';
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};
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};
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};
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inherit (pkgs) substituteAll writeText coreutils utillinux udev;
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kernel = config.boot.kernelPackages.kernel;
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activateConfiguration = config.system.activationScripts.script;
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bootStage2 = substituteAll {
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src = ./stage-2-init.sh;
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isExecutable = true;
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inherit kernel activateConfiguration;
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inherit (config.boot) devSize devShmSize;
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ttyGid = config.ids.gids.tty;
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upstart = config.system.build.upstart;
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path =
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[ coreutils
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utillinux
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udev
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];
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postBootCommands = writeText "local-cmds"
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''
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${config.boot.postBootCommands}
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${config.powerManagement.powerUpCommands}
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'';
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};
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in
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{
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require = [options];
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system.build.bootStage2 = bootStage2;
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}
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