[CRIU] Error in dumping LXC container

[Pavel Emelyanov]

On 01/20/2015 11:24 PM, Andrey Wagin wrote:
> 2015-01-20 23:17 GMT+03:00 Pavel Emelyanov <xemul at parallels.com>:
>> On 01/20/2015 07:32 PM, beproject criu wrote:
>>> Hi,
>>> I am trying to dump a lxc container using the below command
>>>
>>> #criu dump --root /usr/local/lib/lxc/rootfs/root --evasive-devices \
>>> --tcp-established --ext-mount-map /dev:dev --file-locks -n net -n mnt \
>>> -n ipc -n pid -vvvvvvvv -D data -o dumplog.txt -t 82
>>>
>>> but i am getting the following errors. I have attached the full dumplog file with this mail.
>>>
>>> (03.458634) Error (mount.c:595): FS mnt ./cache dev 0x1f00002 root / unsupported id 3a
>>
>> Which filesystem is mounted inside container into /cache directory?
>>
>>> (03.458850) Collecting netns 8/82
>>> (03.458979) Switching to 82's net for collecting sockets
>>> .
>>> (03.501004) Error (mount.c:2257): The root task has another root than mntns: /usr/local/lib/lxc/rootfs/root
>>
>> Andrey? What does it mean?
> 
> /usr/local/lib/lxc/rootfs/root isn't a mount point

Why should it be such?