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Date: Thu, 14 Oct 2010 08:38:54 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: David Rientjes <rientjes@google.com>
CC: Ingo Molnar <mingo@redhat.com>, Thomas Gleixner <tglx@linutronix.de>,
        Casey Dahlin <cdahlin@redhat.com>, x86@kernel.org,
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Subject: Re: [patch] x86: allow ZONE_DMA to be configurable
References: <alpine.DEB.2.00.1010131713160.24646@chino.kir.corp.google.com> <4CB64D8F.9080800@zytor.com> <alpine.DEB.2.00.1010131739010.27124@chino.kir.corp.google.com> <4CB65262.3070507@zytor.com> <alpine.DEB.2.00.1010131744540.27124@chino.kir.corp.google.com> <cbd8b37e-a1a3-4275-8acb-a76476211366@email.android.com> <alpine.DEB.2.00.1010131832400.794@chino.kir.corp.google.com> <4CB688F4.9040706@zytor.com> <alpine.DEB.2.00.1010132140550.20995@chino.kir.corp.google.com>
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On 10/13/2010 09:46 PM, David Rientjes wrote:
> 
> I'm not running a CONFIG_EMBEDDED kernel and I'm pretty sure Casey isn't 
> either, so we'd still need to carry our own patches to change the Kconfig 
> bool line anyway.
> 
> I'm suprised that we can't allow users who definitively know that they 
> have no hardware limitations the ability to disable ZONE_DMA.  Would a 
> strong caution in the Kconfig "help" text suffice or will you not be 
> convinced?

CONFIG_EMBEDDED *is* "I am a user who (think I) know what I'm doing".
That is *what it is* and *all it is*.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.