{
  "module": "kernel",
  "version": "1",
  "capabilities": [
    "service-manager"
  ],
  "config": {
    "transparent-huge-pages": {
      "type": "string",
      "description": "madvise is the value the mesh chose for every node (novox/hq ADR 0381), not the always the distribution's kernel boots with; a machine that needs another value is given it as its own setting; madvise gives huge pages only to programs that ask for them, which stops a small write to a mapped file (the journal) dirtying and writing back a whole 2 MiB page on a machine whose disks are slow (novox/hq issue 746)",
      "trusted": true,
      "default": "madvise"
    }
  },
  "tools": [
    "kernel_huge_pages"
  ],
  "resources": [
    {
      "id": "state",
      "type": "directory",
      "mode": "0700",
      "place": "."
    },
    {
      "id": "huge-pages",
      "type": "file",
      "path": "${dir:state}/huge-pages",
      "mode": "0755",
      "trusted": true,
      "template": "files/huge-pages.sh"
    },
    {
      "id": "unit",
      "type": "file",
      "path": "/etc/systemd/system/mesh-kernel-huge-pages.service",
      "mode": "0644",
      "template": "files/mesh-kernel-huge-pages.service"
    },
    {
      "id": "apply",
      "type": "service",
      "unit": "mesh-kernel-huge-pages.service",
      "state": "running",
      "boot": "enabled",
      "restart-on": [
        "unit"
      ],
      "reload-on": [
        "huge-pages"
      ],
      "health": {
        "kind": "unit"
      }
    }
  ],
  "build": {
    "artifacts": [
      {
        "name": "tools",
        "kind": "bundle",
        "language": "go",
        "system": "arch",
        "from": "cmd/kernel-tools",
        "binary": "kernel-tools",
        "loads": [
          "kernel-tools"
        ]
      },
      {
        "name": "files",
        "kind": "archive",
        "from": "files"
      }
    ]
  }
}