From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.12.11.20060308/8.12.11/SuSE Linux 0.7) with ESMTP id mAPKitCO005119 for ; Tue, 25 Nov 2008 14:44:56 -0600 Received: from buick.jordet.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 72EB715F5367 for ; Tue, 25 Nov 2008 12:44:55 -0800 (PST) Received: from buick.jordet.net (buick.jordet.net [193.91.240.190]) by cuda.sgi.com with ESMTP id 7o2FRZob4oPKV0jw for ; Tue, 25 Nov 2008 12:44:55 -0800 (PST) Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] From: Stian Jordet In-Reply-To: References: <1226760254.5089.11.camel@chevrolet> <430c4fa50811180551r67d5d680tf1ffa493604ac4ea@mail.gmail.com> <1227476908.32357.5.camel@chevrolet> <1227485956.5145.10.camel@chevrolet> <1227569808.5039.6.camel@chevrolet> Date: Tue, 25 Nov 2008 21:44:47 +0100 Message-Id: <1227645887.7992.10.camel@chevrolet> Mime-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: xfs-bounces@oss.sgi.com Errors-To: xfs-bounces@oss.sgi.com To: Sven-Haegar Koch Cc: xfs@oss.sgi.com, linux-kernel@vger.kernel.org ti., 25.11.2008 kl. 01.09 +0100, skrev Sven-Haegar Koch: > I had the same problem when I tried it on my laptop (T60) - using it on > the unencrypted root filesystem (with /usr/src) took ages, using it on > the LUKS encrypted /home was blasing fast - on the same disk. > > This test was some time ago with something like 2.6.20 or 2.6.24 - I > gave up and reformatted / with ext3 as I needed the machine. > > I think barriers were the problem, they seem to cost performance like > hell, especially for operations with many small files. My laptop used > barriers for xfs on the direct partition, but not on crypto drivermapper > mounts. > > So perhaps try mounting with nobarrier and see if the speed problem goes > away - but know that you sacrifice some crash-resilience when doing so. Barriers were the problem indeed. My old system had no problems with barriers, but here it did an incredible difference. Thanks! -Stian _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs