···

       
1336
       
 
       
          the npm install step prunes dev dependencies.

     

       
1337
       
 
       
        </para>

     

       
1338
       
 
       
      </listitem>

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
1339
       
 
       
    </itemizedlist>

     

       
1340
       
 
       
  </section>

     

       
1341
       
 
       
</section>

     

···

       
1336
       
 
       
          the npm install step prunes dev dependencies.

     

       
1337
       
 
       
        </para>

     

       
1338
       
 
       
      </listitem>

     

       
1339
       
+
       
      <listitem>

     

       
1340
       
+
       
        <para>

     

       
1341
       
+
       
          boot.kernel.sysctl is defined as a freeformType and adds a

     

       
1342
       
+
       
          custom merge option for <quote>net.core.rmem_max</quote>

     

       
1343
       
+
       
          (taking the highest value defined to avoid conflicts between 2

     

       
1344
       
+
       
          services trying to set that value)

     

       
1345
       
+
       
        </para>

     

       
1346
       
+
       
      </listitem>

     

       
1347
       
 
       
    </itemizedlist>

     

       
1348
       
 
       
  </section>

     

       
1349
       
 
       
</section>

     

···

       
395
       
 
       


     

       
396
       
 
       
- The `nodePackages` package set now defaults to the LTS release in the `nodejs` package again, instead of being pinned to `nodejs-14_x`. Several updates to node2nix have been made for compatibility with newer Node.js and npm versions and a new `postRebuild` hook has been added for packages to perform extra build steps before the npm install step prunes dev dependencies.

     

       
397
       
 
       


     

       
0
       
 
       

     

       
0
       
 
       

     

       
398
       
 
       
<!-- To avoid merge conflicts, consider adding your item at an arbitrary place in the list instead. -->

     

···

       
395
       
 
       


     

       
396
       
 
       
- The `nodePackages` package set now defaults to the LTS release in the `nodejs` package again, instead of being pinned to `nodejs-14_x`. Several updates to node2nix have been made for compatibility with newer Node.js and npm versions and a new `postRebuild` hook has been added for packages to perform extra build steps before the npm install step prunes dev dependencies.

     

       
397
       
 
       


     

       
398
       
+
       
- boot.kernel.sysctl is defined as a freeformType and adds a custom merge option for "net.core.rmem_max" (taking the highest value defined to avoid conflicts between 2 services trying to set that value)

     

       
399
       
+
       


     

       
400
       
 
       
<!-- To avoid merge conflicts, consider adding your item at an arbitrary place in the list instead. -->

     

···

       
21
       
 
       
  options = {

     

       
22
       
 
       


     

       
23
       
 
       
    boot.kernel.sysctl = mkOption {

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
0
       
 
       

     

       
24
       
 
       
      default = {};

     

       
25
       
 
       
      example = literalExpression ''

     

       
26
       
 
       
        { "net.ipv4.tcp_syncookies" = false; "vm.swappiness" = 60; }

     

       
27
       
 
       
      '';

     

       
28
       
-
       
      type = types.attrsOf sysctlOption;

     

       
29
       
 
       
      description = lib.mdDoc ''

     

       
30
       
 
       
        Runtime parameters of the Linux kernel, as set by

     

       
31
       
 
       
        {manpage}`sysctl(8)`.  Note that sysctl

     
···

       
35
       
 
       
        parameter may be a string, integer, boolean, or null

     

       
36
       
 
       
        (signifying the option will not appear at all).

     

       
37
       
 
       
      '';

     

       
0
       
 
       

     

       
38
       
 
       
    };

     

       
39
       
 
       


     

       
40
       
 
       
  };

     

···

       
21
       
 
       
  options = {

     

       
22
       
 
       


     

       
23
       
 
       
    boot.kernel.sysctl = mkOption {

     

       
24
       
+
       
      type = types.submodule {

     

       
25
       
+
       
        freeformType = types.attrsOf sysctlOption;

     

       
26
       
+
       
        options."net.core.rmem_max" = mkOption {

     

       
27
       
+
       
          type = types.nullOr types.ints.unsigned // {

     

       
28
       
+
       
            merge = loc: defs:

     

       
29
       
+
       
              foldl

     

       
30
       
+
       
                (a: b: if b.value == null then null else lib.max a b.value)

     

       
31
       
+
       
                0

     

       
32
       
+
       
                (filterOverrides defs);

     

       
33
       
+
       
          };

     

       
34
       
+
       
          default = null;

     

       
35
       
+
       
          description = lib.mdDoc "The maximum socket receive buffer size. In case of conflicting values, the highest will be used.";

     

       
36
       
+
       
        };

     

       
37
       
+
       
      };

     

       
38
       
 
       
      default = {};

     

       
39
       
 
       
      example = literalExpression ''

     

       
40
       
 
       
        { "net.ipv4.tcp_syncookies" = false; "vm.swappiness" = 60; }

     

       
41
       
 
       
      '';

     

       
0
       
 
       

     

       
42
       
 
       
      description = lib.mdDoc ''

     

       
43
       
 
       
        Runtime parameters of the Linux kernel, as set by

     

       
44
       
 
       
        {manpage}`sysctl(8)`.  Note that sysctl

     
···

       
48
       
 
       
        parameter may be a string, integer, boolean, or null

     

       
49
       
 
       
        (signifying the option will not appear at all).

     

       
50
       
 
       
      '';

     

       
51
       
+
       


     

       
52
       
 
       
    };

     

       
53
       
 
       


     

       
54
       
 
       
  };

     

···

       
431
       
 
       
      # https://trac.transmissionbt.com/browser/trunk/libtransmission/tr-udp.c?rev=11956.

     

       
432
       
 
       
      # at least up to the values hardcoded here:

     

       
433
       
 
       
      (mkIf cfg.settings.utp-enabled {

     

       
434
       
-
       
        "net.core.rmem_max" = mkDefault "4194304"; # 4MB

     

       
435
       
 
       
        "net.core.wmem_max" = mkDefault "1048576"; # 1MB

     

       
436
       
 
       
      })

     

       
437
       
 
       
      (mkIf cfg.performanceNetParameters {

     

···

       
431
       
 
       
      # https://trac.transmissionbt.com/browser/trunk/libtransmission/tr-udp.c?rev=11956.

     

       
432
       
 
       
      # at least up to the values hardcoded here:

     

       
433
       
 
       
      (mkIf cfg.settings.utp-enabled {

     

       
434
       
+
       
        "net.core.rmem_max" = mkDefault 4194304; # 4MB

     

       
435
       
 
       
        "net.core.wmem_max" = mkDefault "1048576"; # 1MB

     

       
436
       
 
       
      })

     

       
437
       
 
       
      (mkIf cfg.performanceNetParameters {