From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Wilson <chris@chris-wilson.co.uk>
Subject: [PATCH 17/70] drm/i915: Optimistically spin for the
	request completion
Date: Tue,  7 Apr 2015 16:20:41 +0100
Message-ID: <1428420094-18352-18-git-send-email-chris@chris-wilson.co.uk>
References: <1428420094-18352-1-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 relay.fireflyinternet.com (hostedrelay.fireflyinternet.com
 [109.228.30.76])
 by gabe.freedesktop.org (Postfix) with ESMTP id BC8D06E59E
 for <intel-gfx@lists.freedesktop.org>; Tue,  7 Apr 2015 08:22:10 -0700 (PDT)
In-Reply-To: <1428420094-18352-1-git-send-email-chris@chris-wilson.co.uk>
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: intel-gfx@lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, Eero Tamminen <eero.t.tamminen@intel.com>, "Rantala,
 Valtteri" <valtteri.rantala@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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