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Date:	Mon, 3 Nov 2008 11:48:07 +0100
From:	Ingo Molnar <>
To:	Dave Airlie <>
Cc:	Keith Packard <>,
	Jesse Barnes <>,
	Nick Piggin <>,
	Dave Airlie <>,
	Yinghai Lu <>,
	Linux Kernel Mailing List <>,
	Linus Torvalds <>
Subject: Re: io resources and cached mappings (was: [git pull] drm patches
	for 2.6.27-rc1)

* Dave Airlie <> wrote:

> On Fri, Oct 24, 2008 at 1:39 AM, Keith Packard <> wrote:
> > On Thu, 2008-10-23 at 10:05 +0200, Ingo Molnar wrote:
> >
> >> Any ballpark-figure numbers you can share with us?
> >
> > For one quake-3 based game we use for performance regression checking,
> > 64-bit kernels run about 18 times faster now. That's the difference
> > between using a zero-cost dynamic mapping and using ioremap_wc for each
> > page.
> >
> > --
> >
> >
> So I've put these patches into Fedora rawhide kernel to test, and 
> glxgears on my 945G hw went from 85fps to 380fps, clearly we would 
> want these patches upstream sooner rather than later.

yep, it's all lined up already in tip/core/resources, and got 
massively tested over the past few days. Will send a pull request to 
Linus tomorrow-ish - we need one final cleanup patch and then it's 
green to go.

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