linux-kernel - Re: Per-instance devpts

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Message-Id: <1217618624.20260.50.camel@nimitz>
Date:	Fri, 01 Aug 2008 12:23:44 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org,
	Containers <containers@...ts.osdl.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Pavel Emelyanov <xemul@...nvz.org>
Subject: Re: Per-instance devpts

On Fri, 2008-08-01 at 11:12 -0700, H. Peter Anvin wrote:
> 1. /dev/ptmx would have to change to a symlink, ptmx -> pts/ptmx.
...
> I worry #1 would have substantial user-space impact, but I don't see a 
> way around it, since there would be no obvious way to associate 
> /dev/ptmx with a filesystem.

Are your worries just about replacing what is now a normal file with a
symlink, and the behavioral changes that come with that?  

I wonder if using a bind mount for the file would be more robust.  We
wouldn't, of course, be able to do it persistently, but I bet it would
be something we could count on udev to do for us.

-- Dave

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