Return-Path: Received: from mail-pf0-f182.google.com ([209.85.192.182]:34194 "EHLO mail-pf0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757072AbcJXDPX (ORCPT ); Sun, 23 Oct 2016 23:15:23 -0400 Received: by mail-pf0-f182.google.com with SMTP id r16so89639271pfg.1 for ; Sun, 23 Oct 2016 20:15:23 -0700 (PDT) Date: Mon, 24 Oct 2016 11:15:19 +0800 From: Eryu Guan To: "J. Bruce Fields" Cc: Chuck Lever , Jeff Layton , linux-nfs@vger.kernel.org Subject: Re: upstream server crash Message-ID: <20161024031519.GN2462@eguan.usersys.redhat.com> References: <20161023182115.GA14481@fieldses.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20161023182115.GA14481@fieldses.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Sun, Oct 23, 2016 at 02:21:15PM -0400, J. Bruce Fields wrote: > I'm getting an intermittent crash in the nfs server as of > 68778945e46f143ed7974b427a8065f69a4ce944 "SUNRPC: Separate buffer > pointers for RPC Call and Reply messages". > > I haven't tried to understand that commit or why it would be a problem yet, I > don't see an obvious connection--I can take a closer look Monday. > > Could even be that I just landed on this commit by chance, the problem is a > little hard to reproduce so I don't completely trust my testing. I've hit the same crash on 4.9-rc1 kernel, and it's reproduced for me reliably by running xfstests generic/013 case, on a loopback mounted NFSv4.1 (or NFSv4.2), XFS is the underlying exported fs. More details please see http://marc.info/?l=linux-nfs&m=147714320129362&w=2 Thanks, Eryu