linux-kernel - Re: [RFC Patch] use MTRR for write combining if PAT is not available

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Date:	Mon, 19 Oct 2009 17:10:24 +0200
From:	Thomas Schlichter <thomas.schlichter@....de>
To:	Ingo Molnar <mingo@...e.hu>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	JBeulich@...ell.com, arjan@...ux.intel.com,
	dri-devel@...ts.sourceforge.net, hancockrwd@...il.com,
	hmh@....eng.br, hpa@...or.com, jbarnes@...tuousgeek.org,
	jeremy.fitzhardinge@...rix.com, linux-kernel@...r.kernel.org,
	mingo@...hat.com, tglx@...utronix.de, thellstrom@...are.com,
	tj@...nel.org, venkatesh.pallipadi@...el.com, x86@...nel.org,
	yinghai@...nel.org
Subject: Re: [RFC Patch] use MTRR for write combining if PAT is not available

Ingo Molnar wrote:
> * Suresh Siddha <suresh.b.siddha@...el.com> wrote:
> > Can't we just force PAT option always and we probably don't care about 
> > ioremap_wc() on processors were PAT doesn't get enabled because of 
> > known errata.
> 
> We can make PAT configurability dependent on EMBEDDED-y - mind sending a 
> patch for that?

I think there already is such a patch in -tip:
http://git.kernel.org/?p=linux/kernel/git/tip/linux-2.6-tip.git;a=commitdiff;h=c03cb3149daed3e411657e3212d05ae27cf1a874

Kind regards,
  Thomas
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