linux-kernel - Re: [PATCH/RFC] Math-emu kills the kernel on Athlon64 X2

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Message-Id: <200610042344.51206.ak@suse.de>
Date:	Wed, 4 Oct 2006 23:44:51 +0200
From:	Andi Kleen <ak@...e.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Jesper Juhl <jesper.juhl@...il.com>,
	Linus Torvalds <torvalds@...l.org>,
	Randy Dunlap <rdunlap@...otime.net>, akpm <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH/RFC] Math-emu kills the kernel on Athlon64 X2

On Thursday 05 October 2006 00:00, Alan Cox wrote:
> Ar Mer, 2006-10-04 am 22:02 +0200, ysgrifennodd Jesper Juhl:
> > > > /etc/rc.d/rc.sshd: line 4: 1491 Illegal instruction    /usr/sbin/sshd
> > >
> > > Ok, I bet you have your sshd compiled to use MMX instructions
> > > unconditionally.
> > >
> > Probably, I haven't checked.
> 
> Or we aren't correctly masking all the other cpuid bits we should in
> this case..

It might be using CPUID directly which can't be masked

-Andi

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