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Date: Wed, 11 Apr 2001 03:23:54 +0200
From: Andi Kleen <ak@suse.de>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Andi Kleen <ak@suse.de>, David Weinehall <tao@acc.umu.se>,
        Alan Cox <alan@lxorguk.ukuu.org.uk>,
        David Howells <dhowells@cambridge.redhat.com>,
        Andrew Morton <andrewm@uow.edu.au>, Ben LaHaise <bcrl@redhat.com>,
        Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] i386 rw_semaphores fix
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In-Reply-To: <Pine.LNX.4.31.0104101809260.15069-100000@penguin.transmeta.com>; from torvalds@transmeta.com on Tue, Apr 10, 2001 at 06:12:12PM -0700
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On Tue, Apr 10, 2001 at 06:12:12PM -0700, Linus Torvalds wrote:
> 
> 
> On Wed, 11 Apr 2001, Andi Kleen wrote:
> >
> > Fixup for user space is probably not that nice (CMPXCHG is used there by
> > linuxthreads)
> 
> In user space I'm not convinced that you couldn't do the same thing
> equally well by just having the proper dynamically linked library.  You'd
> not get in-lined lock primitives, but that's probably fine.

It's currently done this way, ld-linux.so looks in a special "686" path when
the ELF vector mentions it, otherwise normal path. There is a special 686
version of glibc and linuxthread. Just it's a very complicated and disk 
space chewing solution for a simple problem (some distributions are starting 
to drop support for 386 because of that)

-Andi
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