Improve kernel regression handling.

lmn-client.yml

@@ -111,25 +111,47 @@
         (ansible_board_name == "312D" or ansible_board_name == "312A")
 
 ## Temporarily fix boot order
-    - name: Make sure kernel package -16 is available
-      ansible.builtin.apt:
-        name: linux-image-6.1.0-16-amd64
-        state: present
+    - name: Check for the buggy kernel
+      stat:
+        path: /boot/vmlinuz-6.1.0-17-amd64
+      register: bug
 
-    - name: Set 6.1.0-16 as default kernel in grub
+    - name: Check for the fixed kernel
+      stat:
+        path: /boot/vmlinuz-6.1.0-18-amd64
+      register: fix
+
+    - name: Work around kernel with CIFS regression
+      block:
+        - name: Make sure kernel package -16 is available
+          ansible.builtin.apt:
+            name: linux-image-6.1.0-16-amd64
+            state: present
+        - name: Set 6.1.0-16 as default kernel in grub
+          lineinfile:
+            dest: /etc/default/grub
+            regexp: '^(GRUB_DEFAULT=).*'
+            line: '\g<1>"Debian GNU/Linux, with Linux 6.1.0-16-amd64"'
+            backrefs: yes
+          notify: Run update-grub
+      when: bug.stat.exists and not fix.stat.exists
+
+    - name: Set latest kernel in grub
       lineinfile:
         dest: /etc/default/grub
         regexp: '^(GRUB_DEFAULT=).*'
-        line: '\g<1>"Advanced options for Debian GNU/Linux>Debian GNU/Linux, with Linux 6.1.0-16-amd64"'
+        line: '\g<1>0'
         backrefs: yes
+      when: fix.stat.exists or not bug.stat.exists
       notify: Run update-grub
 
+## Clean up stuff from obsolete/faulty tasks:
     - name: Remove "unattended-upgrades" package
       ansible.builtin.apt:
         name: unattended-upgrades
         state: absent
+        purge: True
 
-## Clean up stuff from obsolete/faulty tasks:
     - name: Remove virtiofs service
       file:
         path: /etc/systemd/system/virtiofs@.service