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Subject: Re: [patch] Prefetching file_read_actor()
To: davej@suse.de (Dave Jones)
Date: Tue, 1 Jan 2002 15:26:12 +0000 (GMT)
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox), akpm@zip.com.au (Andrew Morton),
        manfred@colorfullife.com (Manfred Spraul),
        linux-kernel@vger.kernel.org (Linux Kernel)
In-Reply-To: <Pine.LNX.4.33.0201011342350.23436-100000@Appserv.suse.de> from "Dave Jones" at Jan 01, 2002 01:45:16 PM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
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> I've come up with a preload_cache() function (for want of a better name)
> and plonked that in prefetch.h for now. Having this #define to nothing
> on other arch's would mean we could use this in places like we currently
> do prefetch().  I'm still not happy with it, but its cleaner than my
> original hack.

copy_*_user_prefetched() is probably the one you need. Then you can prefetch
first for PIII, prefetch as copying for athlon etc. It will also provide
the needed hints about which copies are wins. 
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