[CRIU] dumping LXC 1.0 container failed - unable to open irmap-cache: No such file or directory

[Andrew Vagin]

On Wed, Mar 05, 2014 at 03:54:33PM +0200, David Shwatrz wrote:
> Christopher,
> Yes, you are absolutely right. In tests which I had done with a simple
> process (not  in a containers environment), everything with c/r worked
> fine, but this same message still appeared.
> 
> >Error (mount.c:430): Mount 327 (master_id: 2 shared_id: 0) has >unreachable sharing
> 
> Any ideas how can we tell to which mount/mount point is this message related ?

Could you show content of /proc/4983/mountinfo?

What distribution do you use in CT?

criu doesn't support cgroup, hugetlbfs, fusectl, configfs, mqueue,
debugfs file systems in containers, so you should umount them from CT.

http://criu.org/LXC

> 
> Regards.
> DavidS
> 
> 
> 
> On Wed, Mar 5, 2014 at 2:55 PM, Christopher Covington
> <cov at codeaurora.org> wrote:
> > On 03/05/2014 05:32 AM, David Shwatrz wrote:
> >> Hello,
> >> I am trying to checkpoint an LXC 1.0 container and it fails.
> >> I am trying it with crtools 1.2.
> >>
> >> The command I use is:
> >> criu dump -t 4983 -v4 -D images --shell-job --ext-unix-sk -o dump.log
> >> --tcp-established --file-locks
> >> and the log file shows this as a first error:
> >> unable to open irmap-cache: No such file or directory
> >> the full log fine is in:
> >> http://pastebin.com/e3MKxmBg
> >
> > The irmap stuff is spurious. This looks like your real error:
> >
> > Error (mount.c:430): Mount 327 (master_id: 2 shared_id: 0) has unreachable sharing
> >
> > Regards,
> > Christopher
> >
> > --
> > Employee of Qualcomm Innovation Center, Inc.
> > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> > hosted by the Linux Foundation.
> _______________________________________________
> CRIU mailing list
> CRIU at openvz.org
> https://lists.openvz.org/mailman/listinfo/criu