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

Cedric Le Goater clg at fr.ibm.com
Thu Aug 21 14:02:11 PDT 2008

Eric W. Biederman wrote:
> Cedric Le Goater <clg at fr.ibm.com> writes:
>> 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.
> Let's call it newinstance if we are going to use the same option for devpts.


> We can update "current->nsproxy->mqueuens" when the newinstance flag is passed
> and otherwise we can mount whatever is the current mqueue filesystem for
> the process.

yes. I'll rebase my previous patchset on this idea.


> That should be simple and just work.
> Eric

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