From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH] drm/i915 : Avoid superfluous invalidation
 of CPU cache lines
Date: Mon, 30 Nov 2015 09:15:19 +0100
Message-ID: <20151130081519.GI17050@phenom.ffwll.local>
References: <1448359524-11814-1-git-send-email-akash.goel@intel.com>
 <20151124100406.GD4437@intel.com>
 <20151124181431.GD17050@phenom.ffwll.local>
 <20151124223938.GC16277@nuc-i3427.alporthouse.com>
 <20151125092109.GO17050@phenom.ffwll.local>
 <56557F13.1010704@intel.com>
 <20151125100055.GR17050@phenom.ffwll.local>
 <565BEB8E.3010401@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mail-wm0-f48.google.com (mail-wm0-f48.google.com [74.125.82.48])
 by gabe.freedesktop.org (Postfix) with ESMTPS id E994B6E3FC
 for <intel-gfx@lists.freedesktop.org>; Mon, 30 Nov 2015 00:15:22 -0800 (PST)
Received: by wmuu63 with SMTP id u63so118197584wmu.0
 for <intel-gfx@lists.freedesktop.org>; Mon, 30 Nov 2015 00:15:21 -0800 (PST)
Content-Disposition: inline
In-Reply-To: <565BEB8E.3010401@intel.com>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: "Goel, Akash" <akash.goel@intel.com>
Cc: intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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