linux-kernel - Re: [PATCH 2/2] x86: Enable monitor/mwait on Intel if BIOS hasn't already

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Message-ID: <20110805094319.GA2420@elte.hu>
Date:	Fri, 5 Aug 2011 11:43:19 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Len Brown <lenb@...nel.org>, Andrew Lutomirski <luto@....edu>,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	Fenghua Yu <fenghua.yu@...el.com>, linux-acpi@...r.kernel.org
Subject: Re: [PATCH 2/2] x86: Enable monitor/mwait on Intel if BIOS hasn't
 already


* Matthew Garrett <mjg59@...f.ucam.org> wrote:

> On Thu, Aug 04, 2011 at 05:54:04PM -0400, Len Brown wrote:
> > > We can't trust BIOS authors to get things right. Where we can reliably 
> > > fix up things that are broken, we should do so.
> > 
> > How about if we can get a BIOS fix for this brand new system, 
> > then we shall not clutter the kernel with a workaround, otherwise 
> > we shall.
> 
> It's a pretty good rule of thumb that if a BIOS bug is present in 
> one BIOS it's present in others, but the users will just never 
> notice.

Yes. There's no harm really from working around a BIOS bug and 
warning about it - when the BIOS gets fixed the warning message will 
go away.

Btw., few people risk upgrading their BIOSen on already purchased 
hardware. I almost never do it, i only do it if it's impossible to 
continue with a current BIOS.

Thanks,

	Ingo
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