Return-Path: Received: from verein.lst.de ([213.95.11.211]:45314 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751871AbbCHPbA (ORCPT ); Sun, 8 Mar 2015 11:31:00 -0400 Date: Sun, 8 Mar 2015 16:30:56 +0100 From: Christoph Hellwig To: "J. Bruce Fields" Cc: Christoph Hellwig , Dave Chinner , Eric Sandeen , linux-nfs@vger.kernel.org, xfs@oss.sgi.com Subject: Re: panic on 4.20 server exporting xfs filesystem Message-ID: <20150308153056.GA24037@lst.de> References: <20150304220900.GX18360@dastard> <20150304222709.GI1627@fieldses.org> <20150304224557.GY4251@dastard> <54F78BE5.1020608@sandeen.net> <20150304225623.GZ4251@dastard> <20150305040849.GJ1627@fieldses.org> <20150305131731.GA16235@lst.de> <20150305150138.GA15674@fieldses.org> <20150305170217.GC15674@fieldses.org> <20150305204749.GA17934@fieldses.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20150305204749.GA17934@fieldses.org> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Thu, Mar 05, 2015 at 03:47:49PM -0500, J. Bruce Fields wrote: > nfsd: client 192.168.122.32 failed to respond to layout recall. Fencing.. > nfsd: fence failed for client 192.168.122.32: -2! > nfsd: client 192.168.122.32 failed to respond to layout recall. Fencing.. > nfsd: fence failed for client 192.168.122.32: -2! There is no userspace elper to do the fencing, so unfortunately this is expecvted. > receive_cb_reply: Got unrecognized reply: calldir 0x1 xpt_bc_xprt ffff88005639a000 xid c21abd62 Now this looks like some issue with the low-level callback path. I've never seen tis before, but from looking at receive_cb_reply this happens if xprt_lookup_rqst can't find a rpc_rqst structured for the xid. Looks like we might be corrupting the request list / xid allocation somewhere? I can prepare a patch for you to aid with xid tracing if you want.