Return-Path: linux-nfs-owner@vger.kernel.org Received: from fieldses.org ([174.143.236.118]:36989 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756416Ab3AOU40 (ORCPT ); Tue, 15 Jan 2013 15:56:26 -0500 Date: Tue, 15 Jan 2013 15:56:25 -0500 From: "J. Bruce Fields" To: Mark Lord Cc: linux-nfs@vger.kernel.org, Linux Kernel , Stanislav Kinsbursky Subject: Re: BUG at net/sunrpc/svc_xprt.c:921 Message-ID: <20130115205625.GH4940@fieldses.org> References: <50F42F85.50907@teksavvy.com> <20130114203711.GA29982@fieldses.org> <50F4D800.5040703@teksavvy.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <50F4D800.5040703@teksavvy.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Mon, Jan 14, 2013 at 11:16:00PM -0500, Mark Lord wrote: > On 13-01-14 03:37 PM, J. Bruce Fields wrote: > > Thanks for the report. > > > > On Mon, Jan 14, 2013 at 11:17:09AM -0500, Mark Lord wrote: > >> Since upgrading to 3.7, and now 3.7.2, my AMD-450E based server > > > > It's acting as an NFS client, right? > > Client and server, with other Linux boxes all running 3.something kernels. > > > What did you upgrade from? > > 3.4.something, I believe. > > >> is getting these BUG complaints. The .config file is gzip'd/attached. > > > > Is this easy to reproduce? > > So far, it seems to pop up within a day or so of any reboot. > I normally only reboot that system for a kernel upgrade, > but can do so a bit more often if there's useful info to collect. So this means svc_delete_xprt was called on an xprt twice. That could happen if server threads are still running (and calling svc_recv) after we start shutting down the server: svc_shutdown_net assumes that server threads are already shut down, but that isn't true any more after the containerization work. I thought that would only be a bug for users actually running multiple containers, but looking at nfs_callback_down, I don't think that's true--it seems to always shut down the thread last. --b.