From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joao Martins <joao.m.martins@oracle.com>
Subject: Re: [RFC] netif: staging grants for requests
Date: Fri, 6 Jan 2017 20:19:43 +0000
Message-ID: <586FFBDF.9000109@oracle.com>
References: <58518B40.3050408@oracle.com>
 <61a6676e5cf5443690bd1eb0a796d9e5@AMSPEX02CL03.citrite.net>
 <alpine.DEB.2.10.1701061103381.2866@sstabellini-ThinkPad-X260>
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.bemta3.messagelabs.com ([195.245.230.39])
 by lists.xenproject.org with esmtp (Exim 4.84_2)
 (envelope-from <joao.m.martins@oracle.com>) id 1cPawv-0005Xj-KX
 for xen-devel@lists.xenproject.org; Fri, 06 Jan 2017 20:17:17 +0000
In-Reply-To: <alpine.DEB.2.10.1701061103381.2866@sstabellini-ThinkPad-X260>
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: Stefano Stabellini <sstabellini@kernel.org>, Paul Durrant <Paul.Durrant@citrix.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>, Wei Liu <wei.liu2@citrix.com>, Andrew Cooper <Andrew.Cooper3@citrix.com>
List-Id: xen-devel@lists.xenproject.org
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