[Bug 1071910] Re: lxc stop will hang forever

[Tim]

*** This bug is a duplicate of bug 1073238 ***
    https://bugs.launchpad.net/bugs/1073238

I might try 3.7 later and see if I can get the memory cgroup working
again, but I'm not sure if I really need it.

3.6.3 is working with the memory cgroup disabled, I tested with over 400
iterations, I have a kernel bug post as well and posted this info there.
I'm going to try and fix the lvremove issue now, I believe it is caused
by this:

udevd[1562]: timeout: killing 'watershed sh -c '/sbin/lvm vgscan; /sbin/lvm vgchange -a y'' [1574]
udevd[1562]: 'watershed sh -c '/sbin/lvm vgscan; /sbin/lvm vgchange -a y'' [1574] terminated by signal 9 (Killed)

I tried adding --noudevsync as one user suggested to: /lib/udev/rules.d/85-lvm2.rules
but I still get the issue, and then LVM and lvremove hang
udevd[6757]: timeout: killing 'watershed sh -c '/sbin/lvm vgscan; /sbin/lvm vgchange --noudevsync -a y'' [7383]
udevd[6757]: 'watershed sh -c '/sbin/lvm vgscan; /sbin/lvm vgchange --noudevsync -a y'' [7383] terminated by signal 9 (Killed)

lvremove first outputs:
Using logical volume(s) on command line
    Archiving volume group "vmg1" metadata (seqno 594).
    Removing snapshot snap
    Found volume group "vmg1"
    Found volume group "vmg1"
    Loading vmg1-vm table (252:0)
    Loading vmg1-snap table (252:1)
  /sbin/dmeventd: stat failed: No such file or directory
    vmg1/snapshot0 already not monitored.
    Suspending vmg1-vm (252:0) with device flush
    Suspending vmg1-snap (252:1) with device flush
    Suspending vmg1-vm-real (252:2) with device flush
    Suspending vmg1-snap-cow (252:3) with device flush
    Found volume group "vmg1"
    Resuming vmg1-snap-cow (252:3)
    Resuming vmg1-vm-real (252:2)
    Resuming vmg1-snap (252:1)
  Unable to deactivate open vmg1-snap-cow (252:3)
  Failed to resume snap.
  libdevmapper exiting with 1 device(s) still suspended.

And then my script calls it a second time which is when it hangs

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Title:
  lxc stop will hang forever

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