From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752618Ab0CQDaX (ORCPT ); Tue, 16 Mar 2010 23:30:23 -0400 Received: from THUNK.ORG ([69.25.196.29]:36377 "EHLO thunker.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751924Ab0CQDaW (ORCPT ); Tue, 16 Mar 2010 23:30:22 -0400 Date: Tue, 16 Mar 2010 23:30:10 -0400 From: tytso@mit.edu To: Ben Gamari Cc: linux-kernel@vger.kernel.org, Olly Betts , martin f krafft Subject: Re: Poor interactive performance with I/O loads with fsync()ing Message-ID: <20100317033010.GE8256@thunk.org> Mail-Followup-To: tytso@mit.edu, Ben Gamari , linux-kernel@vger.kernel.org, Olly Betts , martin f krafft References: <4b9fa440.12135e0a.7fc8.ffffe745@mx.google.com> <20100317012439.GA8256@thunk.org> <4ba049f1.017ee70a.5ce6.1456@mx.google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4ba049f1.017ee70a.5ce6.1456@mx.google.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on thunker.thunk.org); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Mar 16, 2010 at 08:18:09PM -0700, Ben Gamari wrote: > Sorry about the lack of any useful information in my initial email. > I clearly didn't read it before sending. > > On Tue, 16 Mar 2010 21:24:39 -0400, tytso@mit.edu wrote: > > What kernel version are you using; what distribution and what version > > of that distro are you running; what file system are you using and > > what if any mount options are you using? And what kind of hard drives > > do you have? > > While this problem has been around for some time, my current configuration > is the following: > > Kernel 2.6.32 (although also reproducible with kernels at least as early as 2.6.28) > Filesystem: Now Btrfs (was ext4 less than a week ago), default mount options > Hard drive: Seagate Momentus 7200.4 (ST9500420AS) > Distribution: Ubuntu 9.10 (Karmic) .... so did switching to Btrfs solve your latency issues, or are you still having problems? - Ted