From: Linus Torvalds <torvalds@transmeta.com>
Subject: Re: [PATCH] direct-IO API change
Date: Fri, 4 Oct 2002 16:44:46 -0700 (PDT)
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Cc: Badari Pulavarty <pbadari@us.ibm.com>, Janet Morgan <janetmor@us.ibm.com>,
        Chuck Lever <cel@citi.umich.edu>,
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To: Andrew Morton <akpm@digeo.com>
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On Fri, 4 Oct 2002, Andrew Morton wrote:
> 
> > Especially since I thought that O_DIRECT on the regular file (or block
> > device) performed about as well as raw does anyway these days? Or is that
> > just one of my LSD-induced flashbacks?
> > 
> 
> Now we're not holding i_sem for O_DIRECT writes to blockdevs,
> I don't think the raw driver offers any advantages at all.  It's
> a compatibility thing to save people from having to add "|O_DIRECT" to
> their source and then typing `ln -s /dev/hda1 /dev/raw/raw0'.

Maybe the raw driver could become a shell that just adds the O_DIRECT? 
Unless it can do something more, of course..

		Linus



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