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Subject: Re: Editing-in-place of a large file
To: mcelrath+linux@draal.physics.wisc.edu (Bob McElrath)
Date: Mon, 3 Sep 2001 15:54:28 +0100 (BST)
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox),
        ingo.oeser@informatik.tu-chemnitz.de (Ingo Oeser),
        linux-kernel@vger.kernel.org
In-Reply-To: <20010903094636.V23180@draal.physics.wisc.edu> from "Bob McElrath" at Sep 03, 2001 09:46:36 AM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> Sounds like a possibility for the kernel to me.  As with most things,

But you have it backwards - things are not "could go in the kernel" things
are "could avoid being in kernel"

> passed around as a target for the video device, a source for a userspace
> program, and a source for DMA to disk)  They also have some special
> flags:
>     fcentl(fd, F_SETFL, FDIRECT); /* enables direct disk access */
>     open(filename, O_DIRECT);     /* likewise */
> See this page for details:
>     http://reality.sgi.com/cpirazzi_engr/lg/uv/disk.html

Andrea has this working on 2.4 + patches