[lxc-users] Kernel lockups when running lxc-start (J?kel)

[Dao Quang Minh]

Hi,

We run a ( sort of ) unconventional FS layout with aufs.

                      bind-mount                    aufs
/var/lib/lxc/container <------- /disk1/container<----+----+ base
                                                     |
                                                     +----+ delta

The container is then started as usual with lxc-start. `/disk1` and
`/var/lib/lxc` are ext4 disks.

Daniel.

>Dear Daniel,
>
>may you please add some information about the type and layout of filesystems involved to get an idea what kind of mount operations are involved. I guess it's some bug in the FS layer while LXC doing the mounts.
>
>thank you
>
>Guido
>
>>-----Original Message-----
>>From: lxc-users-bounces at lists.linuxcontainers.org [mailto:lxc-users-bounces at lists.linuxcontainers.org] On Behalf Of Dao
>>Quang Minh
>>Sent: Wednesday, March 12, 2014 9:03 AM
>>To: lxc-users at lists.linuxcontainers.org
>>Subject: [lxc-users] Kernel lockups when running lxc-start
>>
>>Hi all,
>>
>>We encounter a bug today when one of our systems enter soft-lockup when we try to start a container. Unfortunately at that
>>point, we have to do a power cycle because we can’t access the system anymore. Here is the kernel.log:
>>
>>[...]
>>
>>After this point, it seems that all lxc-start will fail,but the system continues to run until we power-cycled it.
>>
>>When i inspected some of the containers that were started during that time, i saw that one of them has an existing
>>lxc_putold directory ( which should be removed when the container finished starting up right ? ). However, i'm not sure if that
>>is related to the lockup above.
>>
>>The host is running on a 12.04 ec2 server, with lxc 1.0.0 and kernel 3.13.0-12.32
>>
>>Cheers,
>>Daniel.
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