[CRIU] Ghost file: no such file or directory

[Federico Reghenzani]

Also, I think that ghost-file-3.img is suspicious because is too big:
~140MB for a process that consumes ~4MB of ram, and the application does
nothing with shared memory (it only initializes the open mpi module). Also
the /tmp/openmpi-sessions-root at roaster-vm3_0 directory has a size of only
256KB.

__
Federico Reghenzani
M.Eng. Student @ Politecnico di Milano
Computer Science and Engineering



2016-03-30 14:33 GMT+02:00 Federico Reghenzani <
federico1.reghenzani at mail.polimi.it>:

> 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
> (00.022558)  `- X [/dev/shm/open_mpi.0000.cr.1.ghost] ghost
> (00.022570)  `- X [/dev/shm/open_mpi.0001.cr.2.ghost] ghost
> (00.022586) Error (files-reg.c:445):  `- XFail
> [/tmp/openmpi-sessions-root at roaster-vm3_0/60995/1/shared_mem_pool.roaster-vm3.1.cr.3.ghost]
> ghost: No such file or directory
> (00.022595) Error (files-reg.c:445):  `- XFail
> [/tmp/openmpi-sessions-root at roaster-vm3_0/60995/1/shared_mem_btl_module.roaster-vm3.1.cr.4.ghost]
> ghost: No such file or directory
> (00.022613) Error (files-reg.c:445):  `- XFail
> [/dev/shm/open_mpi.0000.cr.5.ghost] ghost: No such file or directory
> (00.022622) Error (cr-restore.c:1995): Restoring FAILED.
>
> Full criu logs attached.
>
> We are migrating to another machine, in unshared context (CLONE_NEWPID |
> CLONE_NEWNS), CRIU version 1.8.
>
>
>
> Any suggestions?
> Cheers,
> Federico
> __
> Federico Reghenzani
> M.Eng. Student @ Politecnico di Milano
> Computer Science and Engineering
>
>
>
>
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