From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Sat, 23 Dec 2006 07:45:38 -0800 (PST) Received: from sandeen.net (sandeen.net [209.173.210.139]) by oss.sgi.com (8.12.10/8.12.10/SuSE Linux 0.7) with ESMTP id kBNFjYqw012214 for ; Sat, 23 Dec 2006 07:45:35 -0800 Message-ID: <458D4EEB.3060501@sandeen.net> Date: Sat, 23 Dec 2006 09:44:43 -0600 From: Eric Sandeen MIME-Version: 1.0 Subject: Re: Possible performance problem introduced between kernel 2.6.15 and 2.6.17 on xfs code References: <458D4845.2010803@emaze.net> In-Reply-To: <458D4845.2010803@emaze.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: fdegrassi Cc: linux-xfs@oss.sgi.com fdegrassi wrote: > Hi all, > i noticed that changing from kernel 2.6.15 to 2.6.17, gnomevfs-copy > operations suffered an heavy performance hit (20 times slower). > I checked quickly (i am not a kernel hacker) and i think it could be > related to libgnomevfs calling fadvice POSIX_FADV_DONTNEED (in > gnome_vfs_forget_cache, disabling this behaviour gets back normal > performance). > I am not able to dig deeper than this, anyway it could be a starting point. > The relevant gnome bugzilla reference is the following: > http://bugzilla.gnome.org/show_bug.cgi?id=363400 > > Francesco Degrassi > > Is a copy command from the shell affected, or just gnome point-n-click? -Eric