From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Subject: Re: [PATCH 6/8] drm/i915: Pin the pages first in shmem
 prepare read/write
Date: Thu, 09 Jun 2016 16:06:59 +0300
Message-ID: <1465477619.9670.31.camel@linux.intel.com>
References: <1465471779-20765-1-git-send-email-chris@chris-wilson.co.uk>
 <1465471779-20765-7-git-send-email-chris@chris-wilson.co.uk>
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 mga14.intel.com (mga14.intel.com [192.55.52.115])
 by gabe.freedesktop.org (Postfix) with ESMTP id E70616EBB9
 for <intel-gfx@lists.freedesktop.org>; Thu,  9 Jun 2016 13:08:00 +0000 (UTC)
In-Reply-To: <1465471779-20765-7-git-send-email-chris@chris-wilson.co.uk>
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: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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