linux-kernel - Re: [PATCH 0/1] devpts: use dynamic

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Message-ID: <CA+55aFxosL1xCBduZ+ocapntrSGBbCfFm36G85+6RcXdLahyLw@mail.gmail.com>
Date:   Wed, 16 Aug 2017 14:55:34 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Christian Brauner <christian.brauner@...onical.com>
Cc:     Christian Brauner <christian.brauner@...ntu.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 0/1] devpts: use dynamic_dname() to generate proc name

On Wed, Aug 16, 2017 at 2:45 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> But it would be good to just test this in general too, and make sure I
> didn't screw up some reference count or something. The patch *looks*
> obviously correct, but ...

Side note: I suspect it should be marked for stable, but it's going to
be basically impossible to back-port this any further than 4.7 or
something where we made each pts mount its own proper filesystem. The
code before that was a mess, and this is never going to work right in
old kernels.

Of course, TIOCGPTPEER itself is much more recent than that and was
done in this merge window, so hopefully you haven't backported it and
expect this all to work in some older kernel?

               Linus