From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757304AbdJPUSg (ORCPT ); Mon, 16 Oct 2017 16:18:36 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:45714 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753248AbdJPUSe (ORCPT ); Mon, 16 Oct 2017 16:18:34 -0400 Subject: Re: [PATCH] xen-netfront, xen-netback: Use correct minimum MTU values To: Wei Liu , Mohammed Gamal References: <1508160032-21689-1-git-send-email-mgamal@redhat.com> <20171016150522.nebui653rkjove7r@citrix.com> Cc: netdev@vger.kernel.org, xen-devel@lists.xenproject.org, paul.durrant@citrix.com, linux-kernel@vger.kernel.org, vkuznets@redhat.com, otubo@redhat.com, cavery@redhat.com, cheshi@redhat.com, Juergen Gross From: Boris Ostrovsky Message-ID: <3da3d5ae-c2cb-380e-368d-a90432608cf1@oracle.com> Date: Mon, 16 Oct 2017 16:19:07 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20171016150522.nebui653rkjove7r@citrix.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/16/2017 11:05 AM, Wei Liu wrote: > On Mon, Oct 16, 2017 at 03:20:32PM +0200, Mohammed Gamal wrote: >> RFC791 specifies the minimum MTU to be 68, while xen-net{front|back} >> drivers use a minimum value of 0. >> >> When set MTU to 0~67 with xen_net{front|back} driver, the network >> will become unreachable immediately, the guest can no longer be pinged. >> >> xen_net{front|back} should not allow the user to set this value which causes >> network problems. >> >> Reported-by: Chen Shi >> Signed-off-by: Mohammed Gamal > Acked-by: Wei Liu > > CC netfront maintainers Reviewed-by: Boris Ostrovsky I can take it via Xen tree unless there are objections. -boris