Return-Path: Received: from mail-vw0-f46.google.com ([209.85.212.46]:64976 "EHLO mail-vw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753151Ab1HCN72 convert rfc822-to-8bit (ORCPT ); Wed, 3 Aug 2011 09:59:28 -0400 Received: by vws1 with SMTP id 1so321530vws.19 for ; Wed, 03 Aug 2011 06:59:28 -0700 (PDT) In-Reply-To: <20110803115302.GB5453@merit.edu> References: <1312233006.23392.17.camel@lade.trondhjem.org> <1312238117.23392.19.camel@lade.trondhjem.org> <20110802022144.GA18157@merit.edu> <2E1EB2CF9ED1CB4AA966F0EB76EAB4430A778575@SACMVEXC2-PRD.hq.netapp.com> <20110802032320.GA18296@merit.edu> <1312288134.4616.21.camel@lade.trondhjem.org> <20110803014808.GA4692@merit.edu> <2E1EB2CF9ED1CB4AA966F0EB76EAB4430A778AE2@SACMVEXC2-PRD.hq.netapp.com> <20110803023805.GA4863@merit.edu> <20110803115302.GB5453@merit.edu> From: Peng Tao Date: Wed, 3 Aug 2011 21:59:08 +0800 Message-ID: Subject: Re: [PATCH v4 00/27] add block layout driver to pnfs client To: Jim Rees Cc: "Myklebust, Trond" , "Adamson, Andy" , Christoph Hellwig , linux-nfs@vger.kernel.org, peter honeyman Content-Type: text/plain; charset=UTF-8 Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 On Wed, Aug 3, 2011 at 7:53 PM, Jim Rees wrote: > Peng Tao wrote: > >  On Wed, Aug 3, 2011 at 10:38 AM, Jim Rees wrote: >  > Myklebust, Trond wrote: >  > >  >  Can you try to turn on the callback debugging ('echo 256 > >  >  /proc/sys/sunrpc/nfs_debug')? A wireshark trace of what is going on >  >  during the hang itself might also help. >  > >  > It doesn't fail with callback debugging turned on.  I suspect the output to >  > my slow serial console disrupts the timing. >  > >  > The trace is in >  > http://www.citi.umich.edu/projects/nfsv4/pnfs/block/download/089.pcap >  In frame 8785, client returned NFS4ERR_DELAY in response to >  CB_SEQUENCE and the next RPC was 12s later. So it should be the case >  that Trond mentioned above. > > That trace was taken with Trond's two patches applied.  So they did not fix > the problem for me. > How do you reproduce it? I was reproducing it by running ./check -nfs and let it run to case 089 and kill it after case 089 run for seconds. -- Thanks, -Bergwolf