[CRIU] Ghost file: no such file or directory

[Tycho Andersen]

On Wed, Mar 30, 2016 at 05:50:32PM +0300, Pavel Emelyanov wrote:
> On 03/30/2016 05:46 PM, Tycho Andersen wrote:
> > On Wed, Mar 30, 2016 at 05:26:15PM +0300, Pavel Emelyanov wrote:
> >> On 03/30/2016 03:33 PM, Federico Reghenzani wrote:
> >>> Hi all!
> >>>
> >>> We have problem restoring Open MPI daemons with child processes that uses shared memory:
> >>>
> >>> (00.022447)    255: Opening ghost file 0x3 for tmp/openmpi-sessions-root at roaster-vm3_0/60995/1/shared_mem_pool.roaster-vm3.1
> >>> (00.022479)    255: Error (files-reg.c:139): Can't open ghost file //tmp/openmpi-sessions-root at roaster-vm3_0/60995/1/shared_mem_pool.roaster-vm3.1.cr.3.ghost: No such file or directory
> >>
> >> Can you check whether the \dirname of this path exists?
> >> I mean this -- //tmp/openmpi-sessions-root at roaster-vm3_0/60995/1/
> >>
> >> Presumably this is the case when not only the file was removed, but also
> >> some dir components. And we've fixed it only in 2.0.
> > 
> > The users I had report it were using post 2.0, so there's some other
> > bug here. I'm trying to reproduce now again, but not having any luck
> > :(
> 
> Do they also see the ENOENT errno from the open(O_CREAT) call?

Which call do you mean here? I don't see anything close to this that
does an O_CREAT on dump.

Tycho