[Devel] Re: [RFC][PATCH 0/8][v2]: Enable multiple mounts of devpts

[Serge E. Hallyn]

Quoting Cedric Le Goater (clg at fr.ibm.com):
> H. Peter Anvin wrote:
> > Cedric Le Goater wrote:
> >>>>
> >>> I suggest "newinstance", but "newns" works, too.
> >>
> >> Could we also use this mount option to 'unshare' a new posix message
> >> queue namespace ?
> > 
> > Sorry, I fail to see the connection with devpts here?  Are you
> > suggesting using the same option for another filesystem (if so, which)?
> 
> yes. the posix message queues are also using a single superblock filesystem. 
> 
> If we want isolate them (for container needs for example), we also need to 
> create a new sb. The patchset I have uses a clone flag but using a mount 
> 'newns' really sounds like a better idea.
> 
> C.  

Yup, that sounds like a good reason to just use 'newns'.

Now the difference with mq is that you have syscalls like mq_open which
need to 'just know' which mqns to use.  However, Nadia had just started
looking at this and I think she was considering tagging the mounts
namespace, which just may make sense.

-serge
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