From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yu Zhang <yu.c.zhang@linux.intel.com>
Subject: [PATCH v9 3/5] x86/ioreq server: Handle
	read-modify-write cases for p2m_ioreq_server pages.
Date: Tue, 21 Mar 2017 10:52:51 +0800
Message-ID: <1490064773-26751-4-git-send-email-yu.c.zhang@linux.intel.com>
References: <1490064773-26751-1-git-send-email-yu.c.zhang@linux.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: <1490064773-26751-1-git-send-email-yu.c.zhang@linux.intel.com>
List-Unsubscribe: <https://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: <https://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: xen-devel@lists.xen.org
Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Paul Durrant <paul.durrant@citrix.com>, zhiyuan.lv@intel.com, Jan Beulich <jbeulich@suse.com>
List-Id: xen-devel@lists.xenproject.org
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