From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Sat, 23 Dec 2006 16:37:32 -0800 (PST) Received: from deflector.emaze.net (deflector.emaze.net [213.178.220.4]) by oss.sgi.com (8.12.10/8.12.10/SuSE Linux 0.7) with ESMTP id kBO0bOqw011126 for ; Sat, 23 Dec 2006 16:37:27 -0800 Received: from localhost (localhost [127.0.0.1]) by deflector.emaze.net (Postfix) with ESMTP id B1957F2816D for ; Sun, 24 Dec 2006 01:35:17 +0100 (CET) Received: from deflector.emaze.net ([127.0.0.1]) by localhost (deflector [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 09604-09 for ; Sun, 24 Dec 2006 01:35:17 +0100 (CET) Received: from [192.168.10.55] (host68-236-dynamic.5-87-r.retail.telecomitalia.it [87.5.236.68]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by deflector.emaze.net (Postfix) with ESMTP id 3DDF6F28080 for ; Sun, 24 Dec 2006 01:35:17 +0100 (CET) Message-ID: <458DCB8D.3040804@emaze.net> Date: Sun, 24 Dec 2006 01:36:29 +0100 From: fdegrassi 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> <458D4EEB.3060501@sandeen.net> In-Reply-To: <458D4EEB.3060501@sandeen.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: linux-xfs@oss.sgi.com The specific problem is related to gnome point-n-click only. Anyway, I could be wrong, but i don't think it is a bug in gnome because: 1. it affects specifically local XFS filesystems only 2. the problem is not present on kernel 2.6.15 (I tested 2.6.17 and 2.6.15, both on ubuntu 6.10) 3. the problem does not manifest if i disable the call to gnome_vfs_forget_cache, that, for what i understand, simply calls fadvice POSIX_FADV_DONTNEED. More info can be found on gnome bugzilla entry. Francesco Degrassi Eric Sandeen wrote: > 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