linux-kernel - Re: [PATCH] floppy: revert floppy disable halt warning

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Message-ID: <20120328073454.GC22885@gmail.com>
Date:	Wed, 28 Mar 2012 09:34:54 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Josh Boyer <jwboyer@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Stephen Hemminger <shemminger@...tta.com>,
	Len Brown <len.brown@...el.com>, linux-kernel@...r.kernel.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] floppy: revert floppy disable halt warning


* H. Peter Anvin <hpa@...or.com> wrote:

> On 03/27/2012 11:40 PM, Ingo Molnar wrote:
> > 
> > No objections from me.
> > 
> > Please resubmit against latest -tip, we unified the idle 
> > routines which likely interacts with that patch.
> 
> To the best of my knowledge, no-hlt only existed because of 
> flaky power distributions on 386/486 systems which were sold 
> to run DOS.  Since DOS did no power management of any kind, 
> including HLT, the power draw was fairly uniform; when exposed 
> to the much higher noise levels you got when Linux used HLT 
> caused some of these systems to fail.
> 
> They were by far in the minority even back then.

This information should be added to the changelog.

Thanks,

	Ingo
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