linux-kernel - Re: [BUG] x86 kenel won't boot under Virtual PC

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Message-ID: <48C54ABD.1050901@zytor.com>
Date:	Mon, 08 Sep 2008 08:54:37 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux@...dersweb.net, linux-kernel@...r.kernel.org,
	the arch/x86 maintainers <x86@...nel.org>,
	Andi Kleen <andi-suse@...stfloor.org>
Subject: Re: [BUG] x86 kenel won't boot under Virtual PC

Andi Kleen wrote:
> On Mon, Sep 08, 2008 at 08:50:46AM -0700, H. Peter Anvin wrote:
>> Andi Kleen wrote:
>>>> The help text is indeed out of date.  I did a patch yesterday to, among 
>>>> other things, update it; I also want to verify that we are disabling all 
>>>> options that can cause gcc or binutils to generate nopl's; I plan to 
>>>> push it today.
>>> You (or whoever did those changes) likely broke a lot of distribution 
>>> setups subtly then. Hopefully the changes were worth that.
>> Likely broke a lot of distribution setups how?
> 
> Previously they could set CPU x and it would still run on other CPUs
> even if that option was not set. If that's not the case anymore then
> they will have some unhappy users once they update their kernels.
> 

That was broken long before by the gcc and binutils authors.

	-hpa
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