Subject: Re: [PATCH][RFC] exception processing in early boot
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Willy Tarreau <w@1wt.eu>
Cc: Andi Kleen <ak@suse.de>, pageexec@freemail.hu, davej@redhat.com,
       linux-kernel@vger.kernel.org
In-Reply-To: <20060830200354.GA496@1wt.eu>
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	 <20060830190125.GA21041@1wt.eu> <200608302136.54624.ak@suse.de>
	 <20060830200354.GA496@1wt.eu>
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Date: Wed, 30 Aug 2006 22:31:18 +0100
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Ar Mer, 2006-08-30 am 22:03 +0200, ysgrifennodd Willy Tarreau:
> So, to conclude, with or without the bug, "hlt;jmp $" will halt the
> CPU as we expect it to. Therefore, I'd like you to restore it in
> the patch.

Having had a dig I would concur that we should add the "hlt" back. The
cases I can find are 386/486 "hangs if hlt executed" bugs, mostly
unresolved/chipset problems and a "hlt during IDE DMA hangs the box" bug
we work around on the Cyrix CS5510.

That said for a PIV at least "hlt" really makes little difference to the
power burn

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