github: Adds tune-disk-performance action

Signed-off-by: Thomas Parrott <[email protected]>

.github/actions/tune-disk-performance.yml

@@ -0,0 +1,17 @@
+name: Tune disk performance
+description: Optimize ext4 FSes for performance, not reliability
+
+runs:
+  using: composite
+  steps:
+    - name: Tune disk performance
+      run: |
+        set -eux
+        # optimize ext4 FSes for performance, not reliability
+        for fs in $(findmnt --noheading --type ext4 --list --uniq | awk '{print $1}'); do
+          # nombcache and data=writeback cannot be changed on remount
+          sudo mount -o remount,noatime,barrier=0,commit=6000 "${fs}" || true
+        done
+
+        # disable dpkg from calling sync()
+        echo "force-unsafe-io" | sudo tee /etc/dpkg/dpkg.cfg.d/force-unsafe-io