From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751423AbWFYNXX (ORCPT ); Sun, 25 Jun 2006 09:23:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751426AbWFYNXX (ORCPT ); Sun, 25 Jun 2006 09:23:23 -0400 Received: from aa001msr.fastwebnet.it ([85.18.95.64]:28571 "EHLO aa001msr.fastwebnet.it") by vger.kernel.org with ESMTP id S1751423AbWFYNXX (ORCPT ); Sun, 25 Jun 2006 09:23:23 -0400 Date: Sun, 25 Jun 2006 15:23:25 +0200 From: Paolo Ornati To: Jens Axboe Cc: Linux Kernel Mailing List , ck@vds.kolivas.org Subject: Re: 2.6.17-ck1: fcache problem... Message-ID: <20060625152325.605faf1f@localhost> In-Reply-To: <20060625102837.GC20702@suse.de> References: <20060625093534.1700e8b6@localhost> <20060625102837.GC20702@suse.de> X-Mailer: Sylpheed-Claws 2.3.0 (GTK+ 2.8.17; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 25 Jun 2006 12:28:39 +0200 Jens Axboe wrote: > > [ 26.673525] fcache: found serial 33, expected 34. > > [ 26.673529] fcache: reprime the cache! > > [ 26.673535] ext3: failed to open fcache (err=-22) > > Hmm, and you are sure that the fs is properly umounted on reboot? Or is > it just remounted ro? It looks like fcache_close_dev() isn't being > called, so the cache serial doesn't match what we expect from the fs, > hence fcache bails out since it could indicate that the fs has been > changed without fcache being attached. Ahh... it is the root fs and it's just remounted read-only by the standard Gentoo scripts ;) I don't think that unmounting it is trivial (you need to chroot to a virtual FS or something...). Does any distro do it? > > What kind of speedup did you see? with cold caches... NORMAL from Grub to KDM login 42"5 (~6" to reach init) KDE 3.5.3 startup 10" Firefox 7" FCACHE from Grub to KDM login 31"4 (~6" to reach init) KDE 3.5.3 startup 4" Firefox 2"4 :) -- Paolo Ornati Linux 2.6.17.1 on x86_64