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Re: [PATCH] replace SYSV shared memory with shm filesystem

To: hans-christoph.rohland@sap.com (Christoph Rohland)
Subject: Re: [PATCH] replace SYSV shared memory with shm filesystem
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Mon, 10 Jan 2000 12:39:50 +0000 (GMT)
Cc: linux-mm@kvack.org (MM mailing list), linux-kernel@vger.rutgers.edu (Linux Kernel Mailing List), ebiederm+eric@ccr.net (Eric W. Biederman), viro@math.psu.edu (Alexander Viro), alan@lxorguk.ukuu.org.uk (Alan Cox), gotom@debian.or.jp (GOTO Masanori)
In-Reply-To: <qwwvh52ruin.fsf_-_@sap.com> from "Christoph Rohland" at Jan 10, 2000 01:17:04 PM
Sender: owner-linux-mm@kvack.org

> replaces/reuses the existing SYSV shm code so you now have to mount
> the fs to be able to use SYSV SHM. But in turn we now have everything
> in place to implement posix shm. This also obsoletes vm_private_data
> in vm_area_struct.

Umm no. It obsoletes vm_private_data for existing merged file systems. The stackable
file systems still need this field (cryptfs, lofs etc)

> Also it is now possible to do e.g. 'rm /dev/shm/*' instead of this
> terrible 'ipcrm shm xx' :-)

Nice

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  - From: Christoph Rohland <hans-christoph.rohland@sap.com>

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