From: "Stephen R. van den Berg" Subject: Re: Fw: Deadlock regression in v2.6.31.6 Date: Thu, 26 Nov 2009 16:07:16 +0100 Message-ID: <64b4daae0911260707i4064f608w4f7169441640567@mail.gmail.com> References: <20091124233555.da6439c4.akpm@linux-foundation.org> <64b4daae0911250056g3364d24l98850a272dcfe483@mail.gmail.com> <1259159512.3314.12.camel@localhost> <64b4daae0911251511q7a070b0aj1c07cdc5d6719b41@mail.gmail.com> <1259247707.6715.46.camel@localhost> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: Andrew Morton , linux-nfs@vger.kernel.org To: Trond Myklebust Return-path: Received: from fg-out-1718.google.com ([72.14.220.152]:51201 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760575AbZKZPHM convert rfc822-to-8bit (ORCPT ); Thu, 26 Nov 2009 10:07:12 -0500 Received: by fg-out-1718.google.com with SMTP id 19so441803fgg.1 for ; Thu, 26 Nov 2009 07:07:17 -0800 (PST) In-Reply-To: <1259247707.6715.46.camel@localhost> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Thu, Nov 26, 2009 at 16:01, Trond Myklebust wrote: > On Thu, 2009-11-26 at 00:11 +0100, Stephen R. van den Berg wrote: >> 1.2.3.167 is the Linux client kernel which locks up, 1.2.3.151 is th= e >> unfs server. >> It looks like the client terminates the TCP connection. =A0The serve= r >> confirms it, the client then sends a final acknowledge. =A0At that p= oint >> the client kernel locks up in the infinite loop. > OK. Have you tried running with RPCDBG_TRANS debugging enabled? I > suspect you might see a flood of 'sendmsg returned unrecognized error= ' > or 'connect returned unhandled error' messages if you do. The pcap trace is not conclusive (enough)? I can run with RPCDBG_TRANS enabled, if it is needed to further pinpoint the problem. --=20 Sincerely, Stephen R. van den Berg.