Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752776AbYKYUpH (ORCPT ); Tue, 25 Nov 2008 15:45:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751832AbYKYUoz (ORCPT ); Tue, 25 Nov 2008 15:44:55 -0500 Received: from buick.jordet.net ([193.91.240.190]:54496 "EHLO buick.jordet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750769AbYKYUoy (ORCPT ); Tue, 25 Nov 2008 15:44:54 -0500 Subject: Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] From: Stian Jordet To: Sven-Haegar Koch Cc: Justin Piszcz , linux-kernel@vger.kernel.org, xfs@oss.sgi.com 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> Content-Type: text/plain Date: Tue, 25 Nov 2008 21:44:47 +0100 Message-Id: <1227645887.7992.10.camel@chevrolet> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1180 Lines: 27 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/