From: Michael Rubin Subject: Re: [PATCH v4 0/3] dioread_nolock patch Date: Fri, 15 Jan 2010 13:47:26 -0800 Message-ID: <532480951001151347w2f1bf2b2j34bb88b58a766f9c@mail.gmail.com> References: <1263583812-21355-1-git-send-email-tytso@mit.edu> <4B50C78D.2000807@redhat.com> <20100115201521.GE7256@thunk.org> <4B50CD5B.9050804@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: tytso@mit.edu, Ext4 Developers List To: Eric Sandeen , Jiaying Zhang Return-path: Received: from smtp-out.google.com ([216.239.33.17]:55588 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751743Ab0AOVrv convert rfc822-to-8bit (ORCPT ); Fri, 15 Jan 2010 16:47:51 -0500 Received: from spaceape23.eur.corp.google.com (spaceape23.eur.corp.google.com [172.28.16.75]) by smtp-out.google.com with ESMTP id o0FLlntZ009068 for ; Fri, 15 Jan 2010 21:47:49 GMT Received: from qyk2 (qyk2.prod.google.com [10.241.83.130]) by spaceape23.eur.corp.google.com with ESMTP id o0FLlmKo014379 for ; Fri, 15 Jan 2010 13:47:48 -0800 Received: by qyk2 with SMTP id 2so683229qyk.6 for ; Fri, 15 Jan 2010 13:47:48 -0800 (PST) In-Reply-To: <4B50CD5B.9050804@redhat.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Fri, Jan 15, 2010 at 12:17 PM, Eric Sandeen wro= te: > tytso@mit.edu wrote: > At one point google was planning to devise a power-fail test > harness. =A0Any news on that? We completed the tests. But there is good news and bad news. The good news is that we were able to shake out a lot of bugs in the no journal case (which have already been submitted upstream). We now can fairly quickly and easily drive a lot of traffic to a system and then cut the power, issue a panic or other event. The bad news is that I was hoping to use open source tools to drive the traffic. The goal would be to allow everyone to reproduce the experiment. We got a little short handed on resources and ended up using Google closed source workloads instead. This was mostly since we were in a rush and able to get the network traffic up in one day with those tools. I was holding back on publishing the results since I was hoping we would be able to generate traffic in a more open manner. But if you are interested in the results anyway then give me or some one on the team a day or two to dig them up. In any case we have powerfail testing as part of our validation and once Jiayingz is satisfied with the patch we will be running those tests. mrubin -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html