From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262081AbTLBNqy (ORCPT ); Tue, 2 Dec 2003 08:46:54 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262092AbTLBNqy (ORCPT ); Tue, 2 Dec 2003 08:46:54 -0500 Received: from k1.dinoex.de ([80.237.200.138]:59592 "EHLO k1.dinoex.de") by vger.kernel.org with ESMTP id S262081AbTLBNqt (ORCPT ); Tue, 2 Dec 2003 08:46:49 -0500 To: linux-kernel CC: ianh@iahastie.clara.net Subject: Re: [2.6] Missing L2-cache after warm boot X-Face: ""xJff%{>hr-{:QXl"Xk2O@@(+F]e{"%EYQiW@mUuvEsL>=mx96j12qW[%m;|:B^n{J8k?Mz[K1_+H;$v,nYx^1o_=4M,L+]FIU~[[`-w~~xsy-BX,?tAF_.8u&0y*@aCv;a}Y'{w@#*@iwAl?oZpvvv X-Message-Flag: This space is intentionally left blank X-Noad: Please don't send me ad's by mail. I'm bored by this type of mail. X-Note: sending SPAM is a violation of both german and US law and will at least trigger a complaint at your provider's postmaster. X-GPG: 1024D/77D4FC9B 2000-08-12 Jochen Hein (28 Jun 1967, Kassel, Germany) Key fingerprint = F5C5 1C20 1DFC DEC3 3107 54A4 2332 ADFC 77D4 FC9B X-BND-Spook: RAF Taliban BND BKA Bombe Waffen Terror AES GPG References: <87ptf8bpnd.fsf@echidna.jochen.org> <200312020300.13067.ianh@iahastie.local.net> From: Jochen Hein X-No-Archive: yes Date: Tue, 02 Dec 2003 14:26:20 +0100 In-Reply-To: <200312020300.13067.ianh@iahastie.local.net> (Ian Hastie's message of "Tue, 2 Dec 2003 03:00:11 +0000") Message-ID: <878ylvjqpv.fsf@echidna.jochen.org> User-Agent: Gnus/5.1002 (Gnus v5.10.2) Emacs/21.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Ian Hastie writes: > On Monday 01 Dec 2003 14:04, Jochen Hein wrote: >> I'm running 2.6.0-test11 on an older Thinkpad 390E, >> When booting into 2.6.0-test11 after running Windows2000 I get: > > Do any of the previous test releases show this problem? -test11 is the first release running on that machine. My older TP600 destroyed its WIndows 95 so I got a replacement. Compiling a kernel takes an hour or two, so it is not much fun trying different kernels. > How are you booting > Linux? Full warm boot via the BIOS or some loadlin kind of boot? via BIOS, lilo in MBR > If it's > via the BIOS then does that show the L2 cache as being present? The BIOS doesn't tell anything, the setup doesn't have a "cache enable" or "turbo" entry. >> When booting cold the boot messages are: > > Presumably from switch on. Yes. >> /proc/cpuinfo contains (after warm boot): >> processor : 0 >> vendor_id : GenuineIntel >> cpu family : 6 >> model : 6 >> model name : Mobile Pentium II >> stepping : 10 >> cpu MHz : 298.598 >> cache size : 256 KB > > And shows as 0 after warm boot? Hm, can't say for sure, because it didn't happen again. > My immediate thought was a BIOS problem. IBM's web site doesn't say any BIOS > updates fix L2 cache related problems, but then it doesn't seem to use > technical descriptions like that. It says the latest BIOS is 1.55 - R01_C9. > > http://www-1.ibm.com/support/docview.wss?rs=0&uid=psg1MIGR-4F3VKB&loc=en_US I'll see what BIOS I have - it is the latest. Thanks for the hint anyway. > Or maybe it's possible that something in MS Windows 2000 is turning off the L2 > cache and it isn't getting reactivated by the warm boot? Is there any way to see what Windows does here? I only found a manual enable of the L2cache when using older processors. > What happens when > you do a cold boot to Linux then reboot from there? That is fine. For now the system seems to be fine, even when starting from Win2k via BIOS reboot. Hmpf. Jochen -- #include <~/.signature>: permission denied