linux-kernel - Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override

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Message-ID: <477805F1.4070201@zytor.com>
Date:	Sun, 30 Dec 2007 12:56:17 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Bodo Eggert <7eggert@....de>, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Rene Herman <rene.herman@...access.nl>, dpreed@...d.com,
	Islam Amer <pharon@...il.com>, Pavel Machek <pavel@....cz>,
	Ingo Molnar <mingo@...hat.com>,
	Andi Kleen <andi@...stfloor.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override

Ingo Molnar wrote:
> * Bodo Eggert <7eggert@....de> wrote:
> 
>> BTW: The error function in 
>> linux-2.6.23/arch/i386/boot/compressed/misc.c uses while(1) without 
>> cpu_relax() in order to halt the machine. Is this fixed? Should it be 
>> fixed?
> 
> this is early bootup so there's no need to be "nice" to other cores or 
> sockets - none of them are really running.
> 

It probably should actually HLT, to avoid sucking power, and stressing 
the thermal system.  We're dead at this point, and the early 486's which 
had problems with HLT will lock up - we don't care.

	-hpa
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