ci: show filesystem and bail

Author: cpcloud

.github/workflows/test-wheel-linux.yml

@@ -93,6 +93,11 @@ jobs:
       - name: Ensure GPU is working
         run: nvidia-smi
 
+      - name: Run df
+        run: |
+          df -T
+          exit 1
+
       - name: Checkout ${{ github.event.repository.name }}
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8  # v5.0.0