From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Intermittent lockups creating/manipulating network namespaces (was Re: large degradation in ip netns add/exec performance in 3.13?) Date: Thu, 13 Feb 2014 10:02:24 -0800 Message-ID: <52FD08B0.2050102@hp.com> References: <52F1461D.8050703@hp.com> <52FAA3A6.9050608@hp.com> <52FAC6D1.50702@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from g4t0016.houston.hp.com ([15.201.24.19]:34630 "EHLO g4t0016.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752067AbaBMSC0 (ORCPT ); Thu, 13 Feb 2014 13:02:26 -0500 Received: from g9t2301.houston.hp.com (g9t2301.houston.hp.com [16.216.185.78]) by g4t0016.houston.hp.com (Postfix) with ESMTP id C14EF14003 for ; Thu, 13 Feb 2014 18:02:25 +0000 (UTC) Received: from [16.103.148.51] (tardy.usa.hp.com [16.103.148.51]) by g9t2301.houston.hp.com (Postfix) with ESMTP id EC83C5C for ; Thu, 13 Feb 2014 18:02:24 +0000 (UTC) In-Reply-To: <52FAC6D1.50702@hp.com> Sender: netdev-owner@vger.kernel.org List-ID: On 02/11/2014 04:56 PM, Rick Jones wrote: > On 02/11/2014 02:26 PM, Rick Jones wrote: >> I did have the system lockup once at 16 concurrent streams on the 3.13.0 >> kernel. Didn't happen the next two times I tried. > > I've had it happen again with a slightly tweaked ("heavier") fake router > creation. I'm guessing the attached soft lockup messages are related > and may help point somewhere. The 16 concurrent streams lockup. The "rest of the system" keeps going. I've had the same hang happen with 3.14.0-rc2 as well. I was able to take a crash dump via "echo c > /proc/sysrq-trigger" but I have no clue how to look at it. More than willing to upload it to netperf.org. rick jones