diff options
Diffstat (limited to 'nixos/modules/config/zram.nix')
| -rw-r--r-- | nixos/modules/config/zram.nix | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/nixos/modules/config/zram.nix b/nixos/modules/config/zram.nix index 5e9870bf6b1..1f513b7e4da 100644 --- a/nixos/modules/config/zram.nix +++ b/nixos/modules/config/zram.nix @@ -80,6 +80,15 @@ in ''; }; + memoryMax = mkOption { + default = null; + type = with types; nullOr int; + description = '' + Maximum total amount of memory (in bytes) that can be used by the zram + swap devices. + ''; + }; + priority = mkOption { default = 5; type = types.int; @@ -146,11 +155,16 @@ in # Calculate memory to use for zram mem=$(${pkgs.gawk}/bin/awk '/MemTotal: / { - print int($2*${toString cfg.memoryPercent}/100.0/${toString devicesCount}*1024) + value=int($2*${toString cfg.memoryPercent}/100.0/${toString devicesCount}*1024); + ${lib.optionalString (cfg.memoryMax != null) '' + memory_max=int(${toString cfg.memoryMax}/${toString devicesCount}); + if (value > memory_max) { value = memory_max } + ''} + print value }' /proc/meminfo) - ${pkgs.utillinux}/sbin/zramctl --size $mem --algorithm ${cfg.algorithm} /dev/${dev} - ${pkgs.utillinux}/sbin/mkswap /dev/${dev} + ${pkgs.util-linux}/sbin/zramctl --size $mem --algorithm ${cfg.algorithm} /dev/${dev} + ${pkgs.util-linux}/sbin/mkswap /dev/${dev} ''; restartIfChanged = false; }; |