From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (from majordomo@localhost) by oss.sgi.com (8.11.2/8.11.3) id f971deQ03445 for linux-mips-outgoing; Sat, 6 Oct 2001 18:39:40 -0700 Received: from dea.linux-mips.net (a1as06-p182.stg.tli.de [195.252.187.182]) by oss.sgi.com (8.11.2/8.11.3) with SMTP id f971dbD03442 for ; Sat, 6 Oct 2001 18:39:37 -0700 Received: (from ralf@localhost) by dea.linux-mips.net (8.11.1/8.11.1) id f971dAc11109; Sun, 7 Oct 2001 03:39:10 +0200 Date: Sun, 7 Oct 2001 03:39:10 +0200 From: Ralf Baechle To: Jun Sun Cc: jim@jtan.com, "H . J . Lu" , linux-mips@oss.sgi.com Subject: Re: test machines; illegal instructions Message-ID: <20011007033910.C4228@dea.linux-mips.net> References: <20010926221223.A17628@neurosis.mit.edu> <20010926202610.B7962@lucon.org> <20011004011632.A19472@neurosis.mit.edu> <3BBDF25F.1A0F2283@mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <3BBDF25F.1A0F2283@mvista.com>; from jsun@mvista.com on Fri, Oct 05, 2001 at 10:48:15AM -0700 X-Accept-Language: de,en,fr Sender: owner-linux-mips@oss.sgi.com Precedence: bulk On Fri, Oct 05, 2001 at 10:48:15AM -0700, Jun Sun wrote: > If your cpu does not have ll/sc instruction, you might be suffering the famous > sysmips() problem. The latest kernel should get you going. > > There is also FPU emulation bug which may cause this problem, but that only > happens on heavy context switches and FPU usages. I've checked in a major bundle of FPU emu fixes last week. The kernel fp code should now produce accurate results and handle exceptions and the Flush to Zero bit as per spec. I have a load more fp fixes pending which I'll checking as soon as I'm absolutely convinced they'll do the right thing. Ralf