From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: panics in tcp_ack Date: Sun, 02 Jun 2013 17:26:07 -0700 Message-ID: <1370219167.24311.108.camel@edumazet-glaptop> References: <51ABE067.2050507@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org To: Rob Herring Return-path: Received: from mail-pb0-f43.google.com ([209.85.160.43]:48680 "EHLO mail-pb0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755254Ab3FCA0I (ORCPT ); Sun, 2 Jun 2013 20:26:08 -0400 Received: by mail-pb0-f43.google.com with SMTP id ma3so4887052pbc.30 for ; Sun, 02 Jun 2013 17:26:08 -0700 (PDT) In-Reply-To: <51ABE067.2050507@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: On Sun, 2013-06-02 at 19:16 -0500, Rob Herring wrote: > Sorry, this time with proper line wrapping... > > I'm debugging a kernel panic in the networking stack that happens with a > cluster (20-40 nodes) of Calxeda highbank (ARM Cortex A9) nodes and > typically only after 10-24 hours. The node are transferring files > between nodes over TCP with 20 clients and servers per node. The kernel > is based on ubuntu 3.5 kernel which is based on 3.5.7.11. So far testing > has shown that 3.8.11 based (ubuntu raring) kernel is fixed. Attempts to > bisect have not yielded results as it seems multiple problems mask the > issue. Perhaps there is some new feature which has indirectly fixed the > problem in 3.8. Oh well, you said it was fixed in 3.8, sorry for my prior mail.