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Date:	Wed, 22 Apr 2015 15:10:41 -0400
From:	Doug Ledford <dledford@...hat.com>
To:	"Luis R. Rodriguez" <mcgrof@...e.com>
Cc:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Andy Lutomirski <luto@...capital.net>,
	mike.marciniszyn@...el.com, infinipath@...el.com,
	linux-rdma@...r.kernel.org, awalls@...metrocast.net,
	Toshi Kani <toshi.kani@...com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	Sean Hefty <sean.hefty@...el.com>,
	Suresh Siddha <sbsiddha@...il.com>,
	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Roland Dreier <roland@...estorage.com>,
	Juergen Gross <jgross@...e.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	Borislav Petkov <bp@...e.de>, Mel Gorman <mgorman@...e.de>,
	Vlastimil Babka <vbabka@...e.cz>,
	Davidlohr Bueso <dbueso@...e.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ville Syrj?l? <syrjala@....fi>,
	Linux Fbdev development list <linux-fbdev@...r.kernel.org>,
	linux-media@...r.kernel.org, X86 ML <x86@...nel.org>,
	mcgrof@...not-panic.com
Subject: Re: ioremap_uc() followed by set_memory_wc() - burrying MTRR

On Wed, 2015-04-22 at 21:05 +0200, Luis R. Rodriguez wrote:

> > > I'd also love to remove the driver if it turns out there are actually
> > > no users. qib substantially replaces it except for a few very old
> > > cards.
> > 
> > To be precise, the split is that ipath powers the old HTX bus cards that
> > only work in AMD systems,
> 
> Do those systems have PAT support? CAn anyone check if PAT is enabled
> if booted on a recent kernel?

I don't have one of these systems any more.  The *only* one I ever had
was a monster IBM box...I can't even find a reference to it any more.

-- 
Doug Ledford <dledford@...hat.com>
              GPG KeyID: 0E572FDD



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