Strangely truncated names in linprocfs in jail

[Chagin Dmitry]

On Wed, Jun 14, 2017 at 04:13:36PM +0200, Willem Jan Withagen wrote:
> Hi,
> 
> I have mount linprocfs in a jail on /compat/linux/proc
> And that seems to work.
> 
> Other than that I have strangely truncated names there:
> 
> root at ceph-0:/compat/linux/proc # ls
> 81117           81218           devices         meminfo         net
>        self            sys
> 81185           cmdline         filesyst?       mounts
> partitio?       stat            uptime
> 81216           cpuinfo         loadavg         mtab            scsi
>        swaps           version
> 
> Both filesystems and partitions seem to malformed.
> 
> And even stranger, in the linprocfs mount on the actual host (not
> jailed) those 2 files do not show.
> 
fixed by r320329
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