Revert "workflows/eval: disable swap" (#432286)

.github/workflows/backport.yml

@@ -23,6 +23,7 @@ jobs:
     name: Backport Pull Request
     if: vars.NIXPKGS_CI_APP_ID && github.event.pull_request.merged == true && (github.event.action != 'labeled' || startsWith(github.event.label.name, 'backport'))
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 3
     steps:
       # Use a GitHub App to create the PR so that CI gets triggered
       # The App is scoped to Repository > Contents and Pull Requests: write for Nixpkgs

.github/workflows/build.yml

@@ -43,6 +43,7 @@ jobs:
             desc: shell
     name: '${{ matrix.system }}: ${{ matrix.desc }}'
     runs-on: ${{ matrix.runner }}
+    timeout-minutes: 60
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:

.github/workflows/check.yml

@@ -38,6 +38,7 @@ jobs:
     permissions:
       pull-requests: write
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 3
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:

.github/workflows/codeowners-v2.yml

@@ -49,6 +49,7 @@ jobs:
   check:
     name: Check
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
@@ -106,6 +107,7 @@ jobs:
   request:
     name: Request
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
     steps:
       - uses: cachix/install-nix-action@f0fe604f8a612776892427721526b4c7cfb23aba # v31
 

.github/workflows/dismissed-review.yml

@@ -25,6 +25,7 @@ jobs:
   minimize:
     name: Minimize as resolved
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 2
     steps:
       - uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
         with:

.github/workflows/edited.yml

@@ -31,6 +31,7 @@ jobs:
     name: Trigger jobs
     runs-on: ubuntu-24.04
     if: github.event.changes.base.ref.from && github.event.changes.base.ref.from != github.event.pull_request.base.ref
+    timeout-minutes: 2
     steps:
       # Use a GitHub App to create the PR so that CI gets triggered
       # The App is scoped to Repository > Contents and Pull Requests: write for Nixpkgs

.github/workflows/eval.yml

@@ -31,12 +31,18 @@ jobs:
     name: ${{ matrix.system }}
     outputs:
       targetRunId: ${{ steps.targetRunId.outputs.targetRunId }}
+    timeout-minutes: 15
     steps:
-      # We'd rather fail than run slow eval on swap.
-      # Failing allows us to adjust the chunkSize to remain fast.
-      - name: Disable swap
+      # This is not supposed to be used and just acts as a fallback.
+      # Without swap, when Eval runs OOM, it will fail badly with a
+      # job that is sometimes not interruptible anymore.
+      # If Eval starts swapping, decrease chunkSize to keep it fast.
+      - name: Enable swap
         run: |
-          sudo swapoff -a
+          sudo fallocate -l 10G /swap
+          sudo chmod 600 /swap
+          sudo mkswap /swap
+          sudo swapon /swap
 
       - name: Check out the PR at the test merge commit
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
@@ -150,6 +156,7 @@ jobs:
     if: needs.eval.outputs.targetRunId
     permissions:
       statuses: write
+    timeout-minutes: 5
     steps:
       - name: Download output paths and eval stats for all systems
         uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
@@ -232,6 +239,7 @@ jobs:
   misc:
     if: ${{ github.event_name != 'push' }}
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:

.github/workflows/lint.yml

@@ -19,6 +19,7 @@ defaults:
 jobs:
   treefmt:
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
@@ -51,6 +52,7 @@ jobs:
 
   parse:
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 10
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
@@ -72,7 +74,6 @@ jobs:
 
   nixpkgs-vet:
     runs-on: ubuntu-24.04-arm
-    # This should take 1 minute at most, but let's be generous. The default of 6 hours is definitely too long.
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

.github/workflows/periodic-merge.yml

@@ -19,6 +19,7 @@ defaults:
 jobs:
   merge:
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 5
     steps:
       # Use a GitHub App to create the PR so that CI gets triggered
       # The App is scoped to Repository > Contents and Pull Requests: write for Nixpkgs

.github/workflows/reviewers.yml

@@ -27,6 +27,7 @@ defaults:
 jobs:
   request:
     runs-on: ubuntu-24.04-arm
+    timeout-minutes: 20
     steps:
       - name: Check out the PR at the base commit
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2