From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: How to track down abysmal performance ata - raid1 - crypto - vg/lv - xfs Date: Wed, 4 Aug 2010 04:50:39 -0400 Message-ID: <20100804085039.GA11671@infradead.org> References: <20100804073546.GA7494@comet.dominikbrodowski.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20100804073546.GA7494@comet.dominikbrodowski.net> Sender: linux-kernel-owner@vger.kernel.org To: Dominik Brodowski , linux-raid@vger.kernel.org, xfs@oss.sgi.com, linux-kernel@vger.kernel.org List-Id: linux-raid.ids On Wed, Aug 04, 2010 at 09:35:46AM +0200, Dominik Brodowski wrote: > How can I best track down the cause of the performance problem, > a) without rebooting too often, and > b) without breaking up the setup specified above (production system)? So did you just upgrade the system from an earlier kernel that did not show these problems? Or did no one notice them before?