From: Norbert Preining Subject: Re: Ext4 slow on links Date: Wed, 20 Jun 2012 13:01:52 +0900 Message-ID: <20120620040152.GB2395@gamma.logic.tuwien.ac.at> References: <20120620002014.GA25471@gamma.logic.tuwien.ac.at> <4FE14034.6070800@redhat.com> <20120620002014.GA25471@gamma.logic.tuwien.ac.at> <20120620021912.GA26323@thunk.org> <20120620033831.GA2395@gamma.logic.tuwien.ac.at> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Ted Ts'o , Eric Sandeen , "linux-ext4@vger.kernel.org" To: Eric Sandeen Return-path: Received: from mx.logic.tuwien.ac.at ([128.130.175.19]:56001 "EHLO mx.logic.tuwien.ac.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750741Ab2FTEBz (ORCPT ); Wed, 20 Jun 2012 00:01:55 -0400 Content-Disposition: inline In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: Hi Eric, On Di, 19 Jun 2012, Eric Sandeen wrote: > You might see if the dir itself is badly fragmented I don't think so, since I did: for i in /usr/local/font-collection/......./* ; do ln -s $i . ; done reboot time ls -l >/dev/null newly created entries shouldn't b fragmented, I guess. > (if not filefrag, stat in debugfs would show you block mapping) and > maybe a blktrace of the actions would show you something interesting as well. I will investigate, but it is the first time I look into that so if you have a link to quick howto, great, otherwise I read through man pages ;-) Best wishes Norbert ------------------------------------------------------------------------ Norbert Preining preining@{jaist.ac.jp, logic.at, debian.org} JAIST, Japan TeX Live & Debian Developer DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094 ------------------------------------------------------------------------ `You'd better be prepared for the jump into hyperspace. It's unpleasently like being drunk.' `What's so unpleasent about being drunk?' `You ask a glass of water.' --- Arthur getting ready for his first jump into hyperspace. --- Douglas Adams, The Hitchhikers Guide to the Galaxy