linux-kernel - Re: Math-emu kills the kernel on Athlon64 X2

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Date:	Wed, 20 Sep 2006 01:48:40 +0100
From:	Sergio Monteiro Basto <sergio@...giomb.no-ip.org>
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	Jesper Juhl <jesper.juhl@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	billm@...bpc.org.au, billm@...urbia.net
Subject: Re: Math-emu kills the kernel on Athlon64 X2

On Tue, 2006-09-19 at 14:28 +0200, Krzysztof Halasa wrote:
> Sergio Monteiro Basto <sergio@...giomb.no-ip.org> writes:
> > I think, math emulation is for 486 and older. 486 DX2 was the first one
> > who have math co processor, on earlier processor it should be disable .
> 
> Actually, 486 DX had built-in FPU as well. It was missing from 486SX
> (486SX + optional 487 FPU = 486DX).
> 
> For 386(DX|SX) there were 387(DX|SX) (386SX used 16-bit bus).
> 
> Many 32-bit motherboards had a socket for Weitek (3167 for 386DX or 4167
> for 486). I think I remember a board with 386DX and 287 socket as well.
> 
> 486DX2 meant the external clock was half the internal.

Fine :),  My (12 year old) 486DX2 already don't need Math-emu. I just
don't see how in a computer like that will be installed a kernel 2.6 .
So why code of math-emu isn't dropped ? 

Btw I try install a kernel 2.4 in my DX2 and works but very very slow .
I think in this type of computer should be install a kernel 2.2 . 

Thanks,
-- 
Sérgio M.B.

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