From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joao Martins <joao.m.martins@oracle.com>
Subject: Re: [PATCH v3 2/6] x86/time: implement tsc as
	clocksource
Date: Tue, 30 Aug 2016 14:59:28 +0100
Message-ID: <57C59140.6000004@oracle.com>
References: <1472042632-12883-1-git-send-email-joao.m.martins@oracle.com>
 <1472042632-12883-3-git-send-email-joao.m.martins@oracle.com>
 <57BEDF440200007800108E4D@prv-mh.provo.novell.com>
 <57C05C3F.7040405@oracle.com>
 <57C41E3C0200007800109B54@prv-mh.provo.novell.com>
 <57C5772E.3090400@oracle.com>
 <57C59889020000780010A272@prv-mh.provo.novell.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
Received: from mail6.bemta6.messagelabs.com ([193.109.254.103])
 by lists.xenproject.org with esmtp (Exim 4.84_2)
 (envelope-from <joao.m.martins@oracle.com>) id 1bejYG-0004zx-Fe
 for xen-devel@lists.xenproject.org; Tue, 30 Aug 2016 13:58:08 +0000
In-Reply-To: <57C59889020000780010A272@prv-mh.provo.novell.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: Jan Beulich <JBeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>, xen-devel@lists.xenproject.org
List-Id: xen-devel@lists.xenproject.org
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