linux-kernel - Re: For review: user

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Message-ID: <5411B44C.5050405@gmail.com>
Date:	Thu, 11 Sep 2014 07:40:12 -0700
From:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
CC:	mtk.manpages@...il.com, lkml <linux-kernel@...r.kernel.org>,
	"linux-man@...r.kernel.org" <linux-man@...r.kernel.org>,
	containers@...ts.linux-foundation.org,
	Andy Lutomirski <luto@...capital.net>,
	richard.weinberger@...il.com, "Serge E. Hallyn" <serge@...lyn.com>
Subject: Re: For review: user_namespace(7) man page

On 09/09/2014 09:16 AM, Eric W. Biederman wrote:
>>> On a related note.  One thing that has come up recently (in 3 separate
>>> >> implementations is that mount(MS_REMOUNT|...,...) must include all of
>>> >> the mount flags that need to be preserved.   People creating read-only
>>> >> bind mounts tend to miss that and the locked flags in mount namespaces.
>>> >> That issue was flushed out now that the kernel is now not allowing most
>>> >> mount flags to be cleared in mount namespaces.
>> >
>> > So, are you meaning that something needs to be added to the page
>> > regarding this point?
> Yes.  The interface is non-intuitive and we should at least document
> the weirdness.

Okay -- I have added that piece to mount(2).

Thanks,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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