[CRIU] Checkpointing failed

[Pavel Emelyanov]

On 10/07/2014 12:48 PM, Thouraya TH wrote:
> Thanks for answer :)
> 
> sudo umount /sys/fs/fuse/
> 
> That's it ?

Yes

> Bests.
> 
> 2014-10-07 9:23 GMT+01:00 Pavel Emelyanov <xemul at parallels.com <mailto:xemul at parallels.com>>:
> 
>     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
> 
>