linux-kernel - Re: [PATCH/RFC] Math-emu kills the kernel on Athlon64 X2 II -- it's terminally broken

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Message-Id: <200610031211.46168.ak@suse.de>
Date:	Tue, 3 Oct 2006 12:11:46 +0200
From:	Andi Kleen <ak@...e.de>
To:	Randy Dunlap <rdunlap@...otime.net>
Cc:	Linus Torvalds <torvalds@...l.org>, akpm <akpm@...l.org>,
	Jesper Juhl <jesper.juhl@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH/RFC] Math-emu kills the kernel on Athlon64 X2 II -- it's terminally broken

On Tuesday 03 October 2006 05:24, Randy Dunlap wrote:

Actually I looked at the code more closely. It looks like kernel math
emulation is much more broken. e.g. kernel_fpu_begin() is missing
code and lots of other paths in i387 that need to check HAVE_HWFP don't.

Fixing it properly would be much more work.

Since it evidently hasn't worked for a long time I'm thinkin about
just marking it CONFIG_BROKEN and deprecating it for 2.6.20

Comments? 

-Andi

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