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To: linux-kernel@vger.kernel.org
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH] i386 rw_semaphores fix
Date: 11 Apr 2001 11:06:13 -0700
Organization: Transmeta Corporation, Santa Clara CA
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In-Reply-To: <20010411020058.B28670@gruyere.muc.suse.de> <E14nJjm-0006X8-00@the-village.bc.nu>
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Copyright: Copyright 2001 H. Peter Anvin - All Rights Reserved
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Followup to:  <E14nJjm-0006X8-00@the-village.bc.nu>
By author:    Alan Cox <alan@lxorguk.ukuu.org.uk>
In newsgroup: linux.dev.kernel
> > 
> > Yes, and with CMPXCHG handler in the kernel it wouldn't be needed 
> > (the other 686 optimizations like memcpy also work on 386) 
> 
> They would still be needed. The 686 built glibc materially improves performance
> on 686 class machines. That one isnt an interesting problem to solve. Install
> the right software instead.
> 

Yes, the big 686 optimization is CMOV, and that one is
ultra-pervasive.

	-hpa
-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
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