[CRIU] procfs reports unexpected mnt_id and path for overlayfs files

[Miklos Szeredi]

On Wed, Apr 15, 2015 at 10:50 AM, Andrew Vagin <avagin at odin.com> wrote:
> Hello Miklos and Everyone else,
>
> We have a report that a container with overlayfs can't be checkpointed.
>
> To dump file descriptors we get information from /proc/pid/fd/ and /proc/pid/fdinfo.
>
> But in case of overlayfs we see unexpected values there.
>
> /proc/PID/fdinfo/FD contains mnt_id which isn't presented in /proc/pid/mountinfo.
> /proc/PID/fd/FD does not contain an absolute path to the opened file.
>
> Can someone help to fix these issues?

See this:

https://lkml.org/lkml/2015/3/20/372

Al didn't like that patch.  But it definitely will be fixed, one way
or the other, in the near future.

Thanks,
Miklos