[CRIU] Problem with CRIU

[Cyrill Gorcunov]

On Fri, May 02, 2014 at 09:38:25AM +0530, Krishan Berwal wrote:
>    Dear Sir/Mam,
> 
>    I am getting some wrong message when i type command sudo criu check
>    root at berwal:/# sudo criu check
>    Error (tun.c:67): No proper support for tun dump/restore: File descriptor
>    in bad state
>    Error (cr-check.c:268): fdinfo doesn't contain the mnt_id field
> 
>    what is supportA  of tun? how can we fix thisA  and same for fdinfo?

This means that TUN c/r missed in kernel and if your application
uses TUN interfaces the criu fail to checkpoint it.

Same for mnt-id. It's relatively new feature merged into vanilla
kernel which is missed in your kernel. This is needed for nested
mount namespaces. I think you can safely ignore it.