[RFC][PATCH 0/8][v2]: Enable multiple mounts of devpts
Serge E. Hallyn
serue at us.ibm.com
Thu Aug 21 10:28:01 PDT 2008
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.
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.
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