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Message-Id: <20070321165650.8e765756.akpm@linux-foundation.org>
Date: Wed, 21 Mar 2007 16:56:50 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Dave Jones <davej@...hat.com>
Cc: Alan Cox <alan@...rguk.ukuu.org.uk>,
Andi Kleen <andi@...stfloor.org>,
"Robert P. J. Day" <rpjday@...dspring.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Adrian Bunk <bunk@...sta.de>
Subject: Re: [PATCH] Delete obsolete RAW driver feature.
On Wed, 21 Mar 2007 19:42:36 -0400
Dave Jones <davej@...hat.com> wrote:
> On Wed, Mar 21, 2007 at 04:27:17PM -0700, Andrew Morton wrote:
> > > [1] Though admittedly the one in RHEL deviates from upstream
> > > as it contains performance enhancements that were vetoed from
> > > upstream acceptance due to it being "deprecated".
> >
> > What enhancements are they?
>
> Hmm, actually it seems I was mistaken, we didn't merge those after all,
> we seem to be shipping what was upstream in 2.6.9/2.6.18.
>
> The patches I was thinking of were a bunch of optimisations for higher
> throughput from someone at Intel iirc. Ken Chen maybe?
Ah, OK.
Ken had an initial set of patches which weren't very popular. Months
later, he had a second set which did get merged into mainline, but they
broke, so that code is presently mucking up fs/block_dev.c, inside #if 0,
awaiting possible repair.
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