From: Eric Whitney Subject: Re: Test generic/299 stalling forever Date: Thu, 18 Jun 2015 12:25:59 -0400 Message-ID: <20150618162559.GA1780@localhost.localdomain> References: <20150618155337.GA10439@thunk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-ext4@vger.kernel.org, fstests@vger.kernel.org To: Theodore Ts'o Return-path: Content-Disposition: inline In-Reply-To: <20150618155337.GA10439@thunk.org> Sender: fstests-owner@vger.kernel.org List-Id: linux-ext4.vger.kernel.org * Theodore Ts'o : > I've been trying to figure out why generic/299 has occasionally been > stalling forever. After taking a closer look, it appears the problem > is that the fio process is stalling in userspace. Looking at the ps > listing, the fio process hasn't run in over six hours, and using > attaching strace to the fio process, it's stalled in a FUTUEX_WAIT. > > Has anyone else seen this? I'm using fio 2.2.6, and I have a feeling > that I started seeing this when I started using a newer version of > fio. So I'm going to try roll back to an older version of fio and see > if that causes the problem to go away. > I've not seen that, but have only been running 4.1-rc* kernels recently. I can say that I ran 1000 trials of generic/299 on nojournal using a vanilla 4.1-rc6 kernel on a Pandaboard successfully with fio 2.2.6. No failures, and completed in ~61 hours for an average test duration of ~3.7 minutes, which agrees well with what I see when sampling the logged output for individual test times. Eric