From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: Discuss GVT context hacks in i915
Date: Mon, 15 Feb 2016 18:20:24 +0100
Message-ID: <20160215172024.GA11240@phenom.ffwll.local>
References: <56C19630.5010301@intel.com> <56C19B26.7020206@intel.com>
 <F3B0350DF4CB6849A642218320DE483D4B8E324F@SHSMSX101.ccr.corp.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-f53.google.com (mail-wm0-f53.google.com [74.125.82.53])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 027C16E6BD
 for <intel-gfx@lists.freedesktop.org>; Mon, 15 Feb 2016 17:19:59 +0000 (UTC)
Received: by mail-wm0-f53.google.com with SMTP id g62so118044571wme.0
 for <intel-gfx@lists.freedesktop.org>; Mon, 15 Feb 2016 09:19:58 -0800 (PST)
Content-Disposition: inline
In-Reply-To: <F3B0350DF4CB6849A642218320DE483D4B8E324F@SHSMSX101.ccr.corp.intel.com>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://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: <https://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: "Wang, Zhi A" <zhi.a.wang@intel.com>
Cc: "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>, "Vetter, Daniel" <daniel.vetter@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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