[CRIU] Checkpointing failed

[Pavel Emelyanov]

On 10/06/2014 09:18 PM, Thouraya TH wrote:
> Hello :) Thanks for answer :)
> 
> root at u1:/# cd /sys/fs/fuse/connections
> root at u1:/sys/fs/fuse/connections# ls
> 30
> root at u1:/sys/fs/fuse/connections# cd 30/
> root at u1:/sys/fs/fuse/connections/30# ls
> abort  congestion_threshold  max_background  waiting
> 
> root at u1:~# cat /proc/self/mountinfo
> 69 52 8:1 /var/lib/lxc/u1/rootfs / rw,relatime - ext4 /dev/disk/by-uuid/afcb71d4-c111-4988-ae14-df81b2a06181 rw,errors=remount-ro,data=ordered
> 70 69 0:32 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw
> 71 69 0:33 / /sys rw,relatime - sysfs sysfs rw
> 72 71 0:16 / /sys/fs/fuse/connections rw,relatime - fusectl none rw
> 73 71 0:6 / /sys/kernel/debug rw,relatime - debugfs none rw
> 74 71 0:10 / /sys/kernel/security rw,relatime - securityfs none rw
> 75 71 0:14 /fs/pstore /sys/fs/pstore rw,nosuid,nodev,noexec,relatime - sysfs sysfs rw
> 53 69 0:34 / /dev/pts rw,relatime - devpts devpts rw,gid=5,mode=620,ptmxmode=666
> 54 69 0:34 /ptmx /dev/ptmx rw,relatime - devpts devpts rw,gid=5,mode=620,ptmxmode=666
> 55 71 0:35 / /sys/fs/cgroup rw,relatime - tmpfs none rw,size=4k,mode=755
> 56 69 0:36 / /run rw,nosuid,noexec,relatime - tmpfs none rw,size=97708k,mode=755
> 57 56 0:37 / /run/lock rw,nosuid,nodev,noexec,relatime - tmpfs none rw,size=5120k
> 58 56 0:38 / /run/shm rw,nosuid,nodev,relatime - tmpfs none rw
> 59 56 0:39 / /run/user rw,nosuid,nodev,noexec,relatime - tmpfs none rw,size=102400k,mode=755

Ah I see. In the upstream kernel fuse and fusectl are not virtualized. So
the latter fs when mounted inside container reveals fuse mounts from all
the system. And criu fails to dump one, though none of the connections
seen inside fusectl belong to this container.

Serge, Tycho, do you have any ideas what can we do about it?

Thouraya, I think for your experiments you can just umount the fusectl fs.

Thanks,
Pavel