[Bug 1196295] Re: lxc-start enters uninterruptible sleep

[Pavel Bennett]

Reproduced even with lxc-stop.

dmesg:

[178420.689704] unregister_netdevice: waiting for lo to become free. Usage count = 1
[178430.919783] unregister_netdevice: waiting for lo to become free. Usage count = 1
[178441.149854] unregister_netdevice: waiting for lo to become free. Usage count = 1
[178451.379920] unregister_netdevice: waiting for lo to become free. Usage count = 1

ps:

root     31536  0.0  0.0  25572  1276 ?        D    06:35   0:00 lxc-
start -n vm-106 -f /tmp/tmp.IsBlHPIMWw -l DEBUG -o
/home/x/lxcdebug/vm-106.txt -- /usr/sbin/dropbear -F -E -m

lxcdebug/vm-106.txt:

      lxc-start 1372761341.653 WARN     lxc_start - inherited fd 9
      lxc-start 1372761341.673 INFO     lxc_apparmor - aa_enabled set to 1

      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/845' (5/6)
      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/846' (7/8)
      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/847' (10/11)
      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/848' (12/13)
      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/849' (14/15)
      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/850' (16/17)
      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/851' (18/19)
      lxc-start 1372761341.674 DEBUG    lxc_conf - allocated pty '/dev/pts/852' (20/21)
      lxc-start 1372761341.674 INFO     lxc_conf - tty's configured
      lxc-start 1372761341.674 DEBUG    lxc_start - sigchild handler set
      lxc-start 1372761341.674 INFO     lxc_start - 'vm-106' is initialized
      lxc-start 1372761341.675 DEBUG    lxc_start - Not dropping cap_sys_boot or watching utmp

      lxc-start 1372761341.676 DEBUG    lxc_conf - mac address of host interface 'vethfS0zzk' changed to private fe:d6:f6:ea:af:ba
      lxc-start 1372761341.676 DEBUG    lxc_conf - instanciated veth 'vethfS0zzk/vethTtYxwJ', index is '23962'
      lxc-start 1372761341.676 INFO     lxc_conf - opened /home/x/vm/vm-106.hold as fd 25
-----------------------------------------

cgroups are clean -- absolutely no vm-X folders under
/sys/fs/cgroup/*/lxc/

lxc.network.type is now 'veth' as I've moved off of using 'phys', but
the result is the same.

This happened after lxc-start / lxc-stop somewhere between 7k and 15k
times. Similar number as reported last time this happened, which really
suggests a leak of some sort.

I have the box in this state right now.

What other details could be helpful?

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https://bugs.launchpad.net/bugs/1196295

Title:
  lxc-start enters uninterruptible sleep

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