linux-kernel - Re: [PATCH] sysctl: Deprecate sys_sysctl in a user space visible fashion.

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Message-ID: <m18x7ozqfy.fsf@ebiederm.dsl.xmission.com>
Date:	Sun, 02 Sep 2007 15:51:29 -0600
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Al Viro <viro@....linux.org.uk>
Cc:	Rob Landley <rob@...dley.net>, "H. Peter Anvin" <hpa@...or.com>,
	Andi Kleen <andi@...stfloor.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sysctl: Deprecate sys_sysctl in a user space visible fashion.

Al Viro <viro@....linux.org.uk> writes:

> On Sun, Sep 02, 2007 at 01:56:33PM -0600, Eric W. Biederman wrote:
>> - I think all that is left is superblock handling and some backward
>>   compatibility magic. (Using the follow_link trick to automatically
>>   mount /proc/sys)
>
> NAK.  Let's explicitly mount this stuff in init scripts; it won't break
> on older kernels and there's no excuse for that kind of kludges in the
> kernel.

I don't much care.   But we do have the infrastructure for it in the
kernel and NFS uses it.  And it seems like a nice way to preserve user
space backwards compatibility, without making the code to nasty.

If we don't mind that bit of change that would make it harder to
upgrade a kernel I don't mind not doing it.  It just looks like a
elegant way to handle that implementation change.

Eric
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