From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff McGee <jeff.mcgee@intel.com>
Subject: Re: [RFC 0/8] Force preemption
Date: Thu, 22 Mar 2018 12:08:40 -0700
Message-ID: <20180322190840.GA2879@jeffdesk>
References: <20180321172625.6415-1-jeff.mcgee@intel.com>
 <5051d846-8724-121c-c21b-736426f73e3f@linux.intel.com>
 <152171088042.23562.11055705672254289437@mail.alporthouse.com>
 <20180322143458.GG19343@jeffdesk>
 <d01a6b6b-4809-5482-6345-350a7feb01b1@linux.intel.com>
 <20180322160137.GN19343@jeffdesk>
 <cd26f404-4f64-4a30-7aa9-e4d547308157@linux.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 mga17.intel.com (mga17.intel.com [192.55.52.151])
 by gabe.freedesktop.org (Postfix) with ESMTPS id 772FB6E1C6
 for <intel-gfx@lists.freedesktop.org>; Thu, 22 Mar 2018 19:23:37 +0000 (UTC)
Content-Disposition: inline
In-Reply-To: <cd26f404-4f64-4a30-7aa9-e4d547308157@linux.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: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: kalyan.kondapally@intel.com, intel-gfx@lists.freedesktop.org, ben@bwidawsk.net
List-Id: intel-gfx@lists.freedesktop.org
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