Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 14 Dec 2000 05:44:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 14 Dec 2000 05:44:35 -0500 Received: from vasquez.zip.com.au ([203.12.97.41]:9992 "EHLO vasquez.zip.com.au") by vger.kernel.org with ESMTP id ; Thu, 14 Dec 2000 05:44:25 -0500 From: Chris Rankin Message-Id: <200012141013.eBEADlp06710@wellhouse.underworld> Subject: Re: /dev/cpu/*/(cpuid, msr) unhappy as modules - OOPS! To: hpa@zytor.com (H. Peter Anvin) Date: Thu, 14 Dec 2000 21:13:47 +1100 (EST) Cc: linux-kernel@vger.kernel.org In-Reply-To: <1193.195.67.189.85.976703444.squirrel@www.zytor.com> from "H. Peter Anvin" at Dec 13, 2000 02:30:44 AM X-Mailer: ELM [version 2.5 PL3] 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 Devfs might explain the 2.4.0-test12 oopses, but it can't possibly explain the oops with 2.2.18. I don't use devfs with 2.2.18. Chris > Looks like a devfs problem; complain to the appropriate people. I refuse > to touch that particular devfs code. > > > I have just compiled Linux 2.2.18 (UP) and Linux 2.4.0-test12 (SMP, > > devfs), and in each case I compiled the msr and cpuid drivers as > > modules. However, when I tried to read from the devices (using "cat"), > > I got oopses from both 2.2.18 and 2.4.0-test12. Neither the msr.o nor > > the cpuid.o modules were loaded beforehand, as I was testing my kmod > > setup. The oopses are below: [2.4.0-test12 oopses removed] > > Linux-2.2.18 (1 oops): > > $ ksymoops -m /boot/System.map-2.2.18 < oops.txt > > ksymoops 2.3.4 on i586 2.2.18. Options used > > -V (default) > > -k /proc/ksyms (default) > > -l /proc/modules (default) > > -o /lib/modules/2.2.18/ (default) > > -m /boot/System.map-2.2.18 (specified) > > > > Warning (compare_maps): ksyms_base symbol module_list_R__ver_module_list > not found in System.map. Ignoring ksyms_base entry > > Dec 13 01:31:18 wellhouse kernel: Unable to handle kernel paging request > at virtual address c887027c > > Dec 13 01:31:18 wellhouse kernel: current->tss.cr3 = 007ad000, %%cr3 = > 007ad000 > > Dec 13 01:31:18 wellhouse kernel: *pde = 01472063 > > Dec 13 01:31:18 wellhouse kernel: Oops: 0000 > > Dec 13 01:31:18 wellhouse kernel: CPU: 0 > > Dec 13 01:31:18 wellhouse kernel: EIP: 0010:[chrdev_open+56/88] > > Dec 13 01:31:18 wellhouse kernel: EFLAGS: 00010286 > > Dec 13 01:31:18 wellhouse kernel: eax: c8870260 ebx: ffffffed ecx: > 00000000 edx: 000000cb > > Dec 13 01:31:18 wellhouse kernel: esi: c34d4380 edi: c0565e60 ebp: > c3c35900 esp: c3b47f4c > > Dec 13 01:31:18 wellhouse kernel: ds: 0018 es: 0018 ss: 0018 > > Dec 13 01:31:18 wellhouse kernel: Process cat (pid: 1645, process nr: 53, > stackpage=c3b47000) > > Dec 13 01:31:18 wellhouse kernel: Stack: c0565e60 00008000 00000003 > 400e88b3 bffffa4c c012497c c0565e60 c34d4380 > > Dec 13 01:31:18 wellhouse kernel: 00000000 c01248d5 00000003 > c05a3000 400e88b3 bffffa4c 00000000 c398549c > > Dec 13 01:31:18 wellhouse kernel: 00000400 c0124b6f c05a3000 > 00008000 00000000 c0124b56 c3b46000 40013ed0 > > Dec 13 01:31:18 wellhouse kernel: Call Trace: [filp_open+184/264] > [filp_open+17/264] [sys_open+63/160] [sys_open+38/160] [error_code+45/64] [ > > system_call+52/64] > > Dec 13 01:31:18 wellhouse kernel: Code: 8b 40 1c 31 db 85 c0 74 0c 83 c4 > f8 56 57 ff d0 89 c3 83 c4 > > Using defaults from ksymoops -t elf32-i386 -a i386 > > > > Code; 00000000 Before first symbol > > 00000000 <_EIP>: > > Code; 00000000 Before first symbol > > 0: 8b 40 1c mov 0x1c(%eax),%eax > > Code; 00000003 Before first symbol > > 3: 31 db xor %ebx,%ebx > > Code; 00000005 Before first symbol > > 5: 85 c0 test %eax,%eax > > Code; 00000007 Before first symbol > > 7: 74 0c je 15 <_EIP+0x15> 00000015 Before > first symbol > > Code; 00000009 Before first symbol > > 9: 83 c4 f8 add $0xfffffff8,%esp > > Code; 0000000c Before first symbol > > c: 56 push %esi > > Code; 0000000d Before first symbol > > d: 57 push %edi > > Code; 0000000e Before first symbol > > e: ff d0 call *%eax > > Code; 00000010 Before first symbol > > 10: 89 c3 mov %eax,%ebx > > Code; 00000012 Before first symbol > > 12: 83 c4 00 add $0x0,%esp > > > > > > 1 warning issued. Results may not be reliable. > > > > I know they're not exactly show-stoppers, but here they are anyway. > > Cheers, > > Chris > > > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/