From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp4-g19.free.fr (smtp4-g19.free.fr [212.27.42.30]) by ozlabs.org (Postfix) with ESMTP id 63251DDED1 for ; Fri, 7 Sep 2007 22:05:13 +1000 (EST) Received: from smtp4-g19.free.fr (localhost.localdomain [127.0.0.1]) by smtp4-g19.free.fr (Postfix) with ESMTP id 8FC106F449 for ; Fri, 7 Sep 2007 14:05:11 +0200 (CEST) Received: from bobafett.staff.proxad.net (bobafett.staff.proxad.net [213.228.1.121]) by smtp4-g19.free.fr (Postfix) with ESMTP id 8D2B66F402 for ; Fri, 7 Sep 2007 14:05:11 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by bobafett.staff.proxad.net (Postfix) with ESMTP id 2A1C028790 for ; Fri, 7 Sep 2007 14:05:08 +0200 (CEST) Received: from bobafett.staff.proxad.net ([127.0.0.1]) by localhost (bobafett.staff.proxad.net [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 0YmRiC3bB4Sw for ; Fri, 7 Sep 2007 14:05:06 +0200 (CEST) Received: from nschichan.priv.staff.proxad.net (nschichan.priv.staff.proxad.net [172.18.3.120]) by bobafett.staff.proxad.net (Postfix) with ESMTP id E41122864C for ; Fri, 7 Sep 2007 14:05:06 +0200 (CEST) From: Nicolas Schichan To: linuxppc-embedded@ozlabs.org Subject: random panic and freezes on mpc8349 itx Date: Fri, 7 Sep 2007 14:05:06 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Message-Id: <200709071405.06500.nschichan@freebox.fr> List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi, I am currently working with an MPC8349ITX board and I have some trouble with the kernel as soon as it reaches userland. If I boot the kernel with all the memory (256MB) available (no mem=... on the command line), I get random freezes or random kernel panics. Some times it won't even run init. Some times it will panic badly if I try to put some pressure to the system (stress --cpu 256). Some times it will hang immediately after logging in, ... If I boot the kernel with mem=64M, these freeze and random panic disapear and I am able to run the stress program without any problems. I have had this strange behaviour on both kernel 2.6.20 and 2.6.22 with mpc834x_itx_defconfig (both from kernel.org) (ARCH=powerpc). I am inclined to say that it is not a broken RAM chip problem because if I use a 2.6.17 from kernel.org with all the RAM available (ARCH=ppc) configured with mpc834x_sys_defconfig (there was no defconfig for the itx board on this version) everything runs fine and I am able to run the stress program without any problems. The panic does not happen very often, 90% of the time, the board hangs and stops responding to ping. When a panic do happen it is almost always in a different place. Does any of you have met this problem before ? If you have any clues about what is hapenning I'd be glad to hear about it :) Thank you for your attention, Regards, -- Nicolas Schichan