From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Fainelli Subject: Re: NFS over NAT causes e1000e transmit hangs Date: Tue, 18 Apr 2017 12:05:11 -0700 Message-ID: <9fa24846-3a2d-26d3-2963-f5e6ec6808a5@gmail.com> References: <42af0e78-3107-1605-f8e1-d73a8c441ff0@gmail.com> <1492542204.10587.138.camel@edumazet-glaptop3.roam.corp.google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: intel-wired-lan@lists.osuosl.org, jeffrey.t.kirsher@intel.com, netdev@vger.kernel.org To: Eric Dumazet Return-path: Received: from mail-pf0-f195.google.com ([209.85.192.195]:32783 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753374AbdDRTFS (ORCPT ); Tue, 18 Apr 2017 15:05:18 -0400 Received: by mail-pf0-f195.google.com with SMTP id c198so282152pfc.0 for ; Tue, 18 Apr 2017 12:05:18 -0700 (PDT) In-Reply-To: <1492542204.10587.138.camel@edumazet-glaptop3.roam.corp.google.com> Sender: netdev-owner@vger.kernel.org List-ID: On 04/18/2017 12:03 PM, Eric Dumazet wrote: > On Tue, 2017-04-18 at 11:18 -0700, Florian Fainelli wrote: >> Hi, >> >> I am using NFS over a NAT with two e1000e adapters and with eth1 being >> the LAN interface and eth0 the WAN interface. The kernel is Ubuntu's >> 16.10 kernel: 4.8.0-46-generic. The device doing NAT over NFS is just >> mounting a remote folder and doing normal execution/file accesses. It's >> enough to untar a file from this device onto a NFS share to expose the >> problem. >> >> The transmit hangs look like the ones below, doing a rmmod/insmod does >> not help eliminated the problem, nor does a power cycle. Stopping the >> NFS over NAT definitively does let the adapter recover. > > Is this NFS over TCP or UDP ? This is NFS over TCP mounted with the following: type nfs (rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=2049,timeo=70,retrans=3,sec=sys,local_lock=none,addr=X.X.X.X) Thanks Eric! -- Florian