From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@suse.com>
Subject: Re: [PATCH v9 2/3] VT-d: wrap a _sync version for all
 VT-d flush interfaces
Date: Tue, 05 Apr 2016 03:35:08 -0600
Message-ID: <5703A2EC02000078000E3151@prv-mh.provo.novell.com>
References: <1459522059-102365-1-git-send-email-quan.xu@intel.com>
 <1459522059-102365-3-git-send-email-quan.xu@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <1459522059-102365-3-git-send-email-quan.xu@intel.com>
Content-Disposition: inline
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: Quan Xu <quan.xu@intel.com>
Cc: dario.faggioli@citrix.com, feng.wu@intel.com, kevin.tian@intel.com, xen-devel@lists.xen.org
List-Id: xen-devel@lists.xenproject.org
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