[Bug 893550] Re: Oneiric fails to boot after upgrade from Natty if /etc/fstab contains a cgroup mount entry

Serge Hallyn 893550 at bugs.launchpad.net
Wed Mar 14 19:21:16 UTC 2012


** Description changed:

  I used LXC on this machine. Therefore I had to add a cgroup mount and added the recommended line
  none /cgroup cgroup defaults 0 0
  to /etc/fstab. This results in an unbootable system after upgrade to Oneiric. Apparently the boot just stops when it comes to mounting the entries in /etc/fstab.
  
  I would expect that either
  a) the system doesn't hang when this is added to /etc/fstab
  b) on upgrade the package detects this condition and removes/comments the according line in /etc/fstab so that the system is still bootable.
  
  SRU Justification:
  1: Impact: failure to boot!
  2: Development fix: don't start cgroup-lite if cgroups are mounted by fstab
  3: Stable fix: same as development fix
  4: Test case:
-    a. add cgroup entry to /etc/ftab, i.e.
- 	mkdir /cgroup
-    	echo "cgroup /cgroup cgroup defaults 0 0" > /etc/fstab
-    b. install cgroup-lite
-    c. reboot
+    a. add cgroup entry to /etc/fstab, i.e.
+  mkdir /cgroup
+     echo "cgroup /cgroup cgroup defaults 0 0" > /etc/fstab
+    b. install cgroup-lite
+    c. reboot
  5: Regression potential: if the patch were wrong, we might end up with cgroup-lite
-    not mounting cgroups when it should.
+    not mounting cgroups when it should.

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https://bugs.launchpad.net/bugs/893550

Title:
  Oneiric fails to boot after upgrade from Natty if /etc/fstab contains
  a cgroup mount entry

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