[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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