From: Rich Johnston Subject: Re: [PATCH 09/10] xfstest: add defragmentation stress tests for ext4 Date: Mon, 4 Mar 2013 17:19:56 -0600 Message-ID: <51352C1C.40409@sgi.com> References: <1361356935-29153-1-git-send-email-dmonakhov@openvz.org> <1361356935-29153-10-git-send-email-dmonakhov@openvz.org> <51310046.5090306@sgi.com> <878v66h9ks.fsf@openvz.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, dchinner@redhat.com, xfs@oss.sgi.com To: Dmitry Monakhov Return-path: In-Reply-To: <878v66h9ks.fsf@openvz.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com List-Id: linux-ext4.vger.kernel.org On 03/01/2013 07:30 PM, Dmitry Monakhov wrote: > On Fri, 1 Mar 2013 13:23:50 -0600, Rich Johnston wrote: >> On 02/20/2013 04:42 AM, Dmitry Monakhov wrote: >> >> Let me know if you agree with these changes and I will make them at >> commit time. > Yes, please do. >> >> Thanks >> --Rich commit a3d92a6cbdf9e98d8e256974b50b025d1d4575ec Author: Dmitry Monakhov Date: Wed Feb 20 10:42:14 2013 +0000 xfstest: add defragmentation stress tests for ext4 Perform various regression tests for ext4defrag subsystem 301'th Test1: Defragment file while other task does direct AIO 302'th Test2: Perform defragmentation on file under buffered AIO while third task does direct AIO to donor file 303'th Test3: Two defrag tasks use common donor file. 304'th Test4: Stress defragmentation. Several threads perform fragmentation at random position use inplace=1 will allocate and free blocks inside defrag event improve load pressure. This tests are considered dangerous because 302'th and 303'th are known to trigger OOPS on recent kernels see:https://gist.github.com/dmonakhov/4770 294 _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs