From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755356AbZEOGru (ORCPT ); Fri, 15 May 2009 02:47:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753479AbZEOGrj (ORCPT ); Fri, 15 May 2009 02:47:39 -0400 Received: from mail-qy0-f112.google.com ([209.85.221.112]:47337 "EHLO mail-qy0-f112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752740AbZEOGri (ORCPT ); Fri, 15 May 2009 02:47:38 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=wR/xfdFPkXDV3mnNhVqrY7+dbG2zu/M06ccnac7OLJFs/8rC7RqTpzjthRi2BNU+eO 4Mtzp/0iPZqq1Vq/YtlYUR471GiTt9nTzliaqW3NKLp7NQYGNjTy27bH2rCCY42RI6kN MtczghApJk9SDdVkenUns66nO+9ccxnbTZhb0= MIME-Version: 1.0 Date: Thu, 14 May 2009 23:47:39 -0700 Message-ID: Subject: Understanding kernel Oops while using M-USB From: Shivdas Gujare To: linux-kernel@vger.kernel.org Cc: linux-usb@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Following is a part of Oops on BeagleBoard, which I am trying to understand... I have pasted complete Oops at http://pastie.org/478896 [] (omap3_pm_idle+0x0/0x120) from [] (cpu_idle+0x40/0x60) [] (cpu_idle+0x0/0x60) from [] (rest_init+0x58/0x6c) r5:c037ee8c r4:c0387d38 [] (rest_init+0x0/0x6c) from [] (start_kernel+0x260/0x2b8) [] (start_kernel+0x0/0x2b8) from [<80008034>] (0x80008034) --------------------end of oops------------------ c00087a0(virtual address of start_kernel) + 0x260(offset) = c0008a00 (value in square bracket above) where c0008a00 is the address of next instruction after branch instruction to c0299ba4(i.e rest_init) But here, I didn't understood what is 0x2b8 from (start_kernel+0x260/0x2b8). i.e. 0x260 is a offset from start_kernel but what is 0x2b8? Also what address 0x80008034 points to? I tried to analyze this using "arm-none-linux-gnueabi-objdump -D vmlinux". I what general scenarios "Unable to handle kernel paging request at virtual address" this message gets printed? Thanks for your help. Thanks and Regards, Shivdas Gujare