linux-kernel - Re: [patch 2/2] agpgart - Remove unnecessary flushes.

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Date:	Mon, 18 Dec 2006 19:05:40 -0500
From:	Dave Jones <davej@...hat.com>
To:	Thomas Hellström <thomas@...gstengraphics.com>
Cc:	Dave Airlie <airlied@...ux.ie>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [patch 2/2] agpgart - Remove unnecessary flushes.

On Fri, Dec 08, 2006 at 07:24:37PM +0100, Thomas Hellström wrote:
 > This patch is to speed up flipping of pages in and out of the AGP 
 > aperture as needed by the new drm memory manager.
 > 
 > A number of global cache flushes are removed as well as some PCI posting 
 > flushes.
 > The following guidelines have been used:
 > 
 > 1) Memory that is only mapped uncached and that has been subject to a 
 > global cache flush after the mapping was changed to uncached does not 
 > need any more cache flushes. Neither before binding to the aperture nor 
 > after unbinding.
 > 
 > 2) Only do one PCI posting flush after a sequence of writes modifying 
 > page entries in the GATT.
 > 
 > Patch against davej's agpgart.git

I looked at applying this one to agpgart.git, as it's less controversial
than the other patch. However,..

- MIME : just say no. I had to hand fix up a few things before git would
  even see that I was feeding it a diff.
- No Signed-off-by: line.
- The diff adds trailing whitespace. This makes git sad also.
  (This problem also affects the other diff, which is possibly why...)
- Finally..
   error: patch failed: drivers/char/agp/generic.c:1076
   error: drivers/char/agp/generic.c: patch does not apply
   error: patch failed: drivers/char/agp/intel-agp.c:256
   error: drivers/char/agp/intel-agp.c: patch does not apply

  Perhaps this diff should have have been [1/2] instead.

Can you fix those up, and resend this one?

The other diff I want to chew over some more before applying, especially
after Arjan's comments.

		Dave

-- 
http://www.codemonkey.org.uk
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