From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934632AbYD1Of0 (ORCPT ); Mon, 28 Apr 2008 10:35:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932574AbYD1OfM (ORCPT ); Mon, 28 Apr 2008 10:35:12 -0400 Received: from fg-out-1718.google.com ([72.14.220.153]:52242 "EHLO fg-out-1718.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763242AbYD1OfK (ORCPT ); Mon, 28 Apr 2008 10:35:10 -0400 Message-ID: <430c4fa50804280735o3d1c3b9cg687f7d374dafbdec@mail.gmail.com> Date: Mon, 28 Apr 2008 11:35:08 -0300 From: "Sergio Luis" To: "Glauber Costa" Subject: Re: 2.6.25 slow boot/reboot Cc: "Ken Moffat" , "Bart Van Assche" , LKML , "Ingo Molnar" In-Reply-To: <4815DCEF.3000602@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <48141111.7010605@larces.uece.br> <20080427235554.GA28344@deepthought> <48152747.4030107@larces.uece.br> <4815DCEF.3000602@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 28, 2008 at 11:19 AM, Glauber Costa wrote: > > Sergio Luis wrote: > > > Ken Moffat wrote: > > > > > On Sun, Apr 27, 2008 at 05:23:57PM +0200, Bart Van Assche wrote: > > > > > > > On Sun, Apr 27, 2008 at 7:37 AM, Sergio Luis > wrote: > > > > > > > > > This weekend I got some time and decided to try out 2.6.25, but its > booting process was _really_ slow in my laptop[1]. With 'old' 2.6.24.5 my > machine would take about 48 secs until it gave me the login prompt. And it > would take about 22 seconds to reboot. > > > > > > > > > Do you use LILO or GRUB for booting ? 2.6.25 works OK on the systems I > > > > tested, but LILO really needs a lot of time to load the 2.6.25 kernel. > > > > GRUB loads the 2.6.25 kernel at normal speed. > > > > > > > > Bart. > > > > > > > ISTR that an _old_ version of lilo was mentioned earlier in this > > > thread. As a datapoint, on my one desktop box which uses lilo (an > > > athlon64 uniprocessor) both 32 and 64-bit 2.6.25 kernels boot fine. > > > Both of those systems are with lilo-22.8, and gcc-4.2.2. > > > > > > But, I think you (Bart) haven't said which version of lilo you are > > > using ? If it isn't recent, perhaps upgrading it might help ? > > > > > > For Sergio, you have my sympathy. I totally failed to bisect my own > > > problem with 2.6.25-rc (and 2.6.24.1), although I did find the problem > > > by other means, and got a work-around, so I'm not competent to > > > diagnose what is wrong, but maybe I can help to tease out what is > > > different about your box. As a start, you could try diffing your > > > config's for 2.6.24.5 and 2.6.25 in case something odd has changed. > > > > > > > > > > I tried bisecting and after some hours I got > 9713277607f9eac7d655c6854dd92bc2ce1b6f02 as first bad commit > > > > commit 9713277607f9eac7d655c6854dd92bc2ce1b6f02 > > Author: Glauber de Oliveira Costa > > Date: Wed Mar 19 14:25:43 2008 -0300 > > > > x86: boot cpus from cpu_up, instead of prepare_cpus > > > > After all the infrastructure work, we're now prepared > > to boot the cpus from cpu_up, and not from prepare_cpus. > > So the difference between cold boot and hotplug is effectively > > over, and the functions are used to the purposes they're meant to. > > > > Signed-off-by: Glauber Costa > > Signed-off-by: Ingo Molnar > > > > (cc'ing Glauber and Ingo, maybe they can help) > > > > > > > Or, perhaps this is a problem specific to a certain processor ? So > > > far, I think all the list knows is that you have a problem, and an > > > old version of lilo. More data might eventually help to identify > > > what is causing this. If you have a fairly old version of lilo, > > > maybe you also have an old version of gcc ? > > > > > > > lilo version is 22.8 > > gcc version is 4.1.2 > > the processor is an amd turion 64x2 2.0 ghz (tl-60) and I am building a > 32bit kernel. > > please, let me know if more info is needed. > > > > > > > For Bart too, which version(s) of gcc are you using on the systems > > > where lilo is slow to load, and which cpu(s) do you have there ? > > > > > > Ken, who relies on lilo for his server, and gets worried by reports > > > of trouble with it. > > > > > > > note lilo is indeed much slower than grub to start booting the kernel > here, but I am talking about this 2.6.25 kernel taking almost 5 min to > finish the boot process (once it is > > actually started by the bootloader) when it would take less than 1 minute > with 2.6.24.5 in > > this same machine. > > > > thanks, > > > Can you give me more information on that? > your .config and cpuinfo would be a great start. > > I'm specially interested in things involving APIC. > Hello, I sent the config's (2.6.24.5 and 2.6.25) attached in the first message of this thread http://lkml.org/lkml/2008/4/27/19 about the cpuinfo, I don't have that computer here right now, as I am at work, so I can't send it at the moment. It's a TL-60 AMD Turion 64x2 (2.0 GHZ), though, if it helps, and as I said, I am building a 32 bit kernel with gcc 4.1.2. Let me know if you need additional info and I will be sending later on when I am with that laptop again. thanks, -sergio