From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: [PATCH 3/3] x86/traps: Adjust paged-guest handling in
	the PV pagefault path
Date: Tue, 13 Dec 2016 16:54:34 +0000
Message-ID: <1481648074-11455-4-git-send-email-andrew.cooper3@citrix.com>
References: <1481648074-11455-1-git-send-email-andrew.cooper3@citrix.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: <1481648074-11455-1-git-send-email-andrew.cooper3@citrix.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 <xen-devel@lists.xen.org>
Cc: George Dunlap <george.dunlap@eu.citrix.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Tim Deegan <tim@xen.org>, Jan Beulich <JBeulich@suse.com>
List-Id: xen-devel@lists.xenproject.org
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