From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1947112Ab3BHU6q (ORCPT ); Fri, 8 Feb 2013 15:58:46 -0500 Received: from fieldses.org ([174.143.236.118]:37815 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1947017Ab3BHU6p (ORCPT ); Fri, 8 Feb 2013 15:58:45 -0500 Date: Fri, 8 Feb 2013 15:58:45 -0500 To: Tom Horsley Cc: linux-kernel@vger.kernel.org Subject: Re: BUG at net/sunrpc/svc_xprt.c:921 Message-ID: <20130208205844.GD21040@fieldses.org> References: <20130207075651.3016819a@tomh> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130207075651.3016819a@tomh> User-Agent: Mutt/1.5.21 (2010-09-15) From: "J. Bruce Fields" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 07, 2013 at 07:56:51AM -0500, Tom Horsley wrote: > I noticed some previous messages with this subject, but the > walkback I'm getting doesn't match exactly the ones shown > in the threads I saw, so I figured I'd send this in. > > This happens on both my Fedora 18 and Fedora 17 partitions > when mounting filesystems from very old servers that > need the proto=udp option to talk. > > The redhat bugzilla is here: > > https://bugzilla.redhat.com/show_bug.cgi?id=908451 > > There is a photo of the walkback in that bugzilla: > > svc_delete_xprt+0x12a > svc_recv+0x101 > ? nfs_callback_authenticate+0x50 > nfs4_callback_svc+0x3b > kthread+0xc0 > ? ftrace_raw_event_xen_mmu_flush_tlb_others+0x50 > ? kthread_create_on_node+0x120 > ret_from_fork+0x7c > ? kthread_create_on_node+0x120 OK, yes this is the if (test_and_set_bit(XPT_DEAD, &xprt->xpt_flags)) BUG(); in svc_delete_xprt() and is a known (but unfixed) problem. Stanislav has some patches, that should be fixed soon.... --b.