linux-kernel - Re: [tip:x86/urgent] x86/kconfig: Add a Kconfig shortcut for building working KVM guest kernels

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Message-ID: <5182A300.9050603@zytor.com>
Date:	Thu, 02 May 2013 10:31:44 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	Borislav Petkov <bp@...en8.de>,
	David Rientjes <rientjes@...gle.com>,
	linux-kernel@...r.kernel.org, Pekka Enberg <penberg@...nel.org>,
	levinsasha928@...il.com, mtosatti@...hat.com, tglx@...utronix.de,
	Borislav Petkov <bp@...e.de>, fengguang.wu@...el.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86/kconfig:  Add a Kconfig shortcut for building
 working KVM guest kernels

On 05/02/2013 12:06 AM, Ingo Molnar wrote:
> 
> * H. Peter Anvin <hpa@...or.com> wrote:
> 
>> On 05/01/2013 04:02 PM, Borislav Petkov wrote:
>>> On Wed, May 01, 2013 at 03:37:28PM -0700, David Rientjes wrote:
>>>> It means your patch is incomplete.
>>>
>>> I'll gladly test and ack a patch which makes it complete.
>>>
>>> Simple exercises in rhetoric about what does and what doesn't make 
>>> sense means a rat's ass to me. You need to show me a *real* use case 
>>> which you *actually* hit and this patch breaks it.
>>
>> The fundamental problem is that "select" is broken and doesn't track 
>> dependencies of things selected.
> 
> The way I've been solving it in a similar usecase was to select the 
> required options - plus its dependencies, manually.
> 
> That should be possible here as well, driven by any weird randconfig build 
> failures that get found. Such a set of selects quickly converges.
> 

The problem is that it is a moving target.  We really need a
dependency-resolving version of select.

	-hpa


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