From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from 0122700014.0.fullrate.dk ([95.166.99.235]:36314 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756559Ab0IXG5c (ORCPT ); Fri, 24 Sep 2010 02:57:32 -0400 Message-ID: <4C9C4BC4.9020503@fusionio.com> Date: Fri, 24 Sep 2010 08:57:08 +0200 From: Jens Axboe MIME-Version: 1.0 Subject: Re: fio causes segfault after particular of random writes References: <4C9B4A53.1080302@uni-rostock.de> In-Reply-To: <4C9B4A53.1080302@uni-rostock.de> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: Nikolaus Jeremic Cc: fio@vger.kernel.org On 2010-09-23 14:38, Nikolaus Jeremic wrote: > Hello, > > I am using fio for benchmarking of SSDs and noticed that fio causes a > segfault after writing about 260000 MB with block size of 4069 bytes > at random in one job. Writing the same or just bigger amount of data > sequentially in 1 MB blocks works well. The situation is reproducible > with several fio versions, i.e. 1.34, 1.41, 1.43, 1.43.2 as of > 09/16/2010. That's not good. To help me with this, please do: - Edit the Makefile in fio, remove the -O2 in there. - make clean && make - Run ulimit -c10000000000 or something large like that - Now reproduce the problem. Fio will segfault again, and produce a core file. - compress the fio executable and core file and send them to me. -- Jens Axboe