From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phil Carinhas Subject: System freeze when accessing st.ko and /dev/st0 Date: Fri, 6 Feb 2004 13:42:25 -0600 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20040206194225.GA27385@mail.fortuitous.com> Reply-To: pac@fortuitous.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from flamingo.mail.pas.earthlink.net ([207.217.120.232]:9183 "EHLO flamingo.mail.pas.earthlink.net") by vger.kernel.org with ESMTP id S265684AbUBFTm1 (ORCPT ); Fri, 6 Feb 2004 14:42:27 -0500 Received: from user-0vvdck9.cable.mindspring.com ([63.246.178.137] helo=mail.fortuitous.com) by flamingo.mail.pas.earthlink.net with esmtp (Exim 3.33 #1) id 1ApBru-0006JL-00 for linux-scsi@vger.kernel.org; Fri, 06 Feb 2004 11:42:26 -0800 Content-Disposition: inline List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org System Freeze When I tried to access the tape drive via 'tar tvfz /dev/st0' the system froze: Here is the call trace: -------- CALL TRACE from /var/log/messages Feb 6 12:25:48 taren kernel: st: Version 20031228, fixed bufsize 32768, s/g segs 256 Feb 6 12:25:48 taren kernel: Attached scsi tape st0 at scsi1, channel 0, id 6, lun 0 Feb 6 12:25:48 taren kernel: st0: try direct i/o: yes, max page reachable by HBA268435455 Feb 6 12:32:22 taren kernel: st: Unloaded. Feb 6 12:32:46 taren kernel: Badness in kobject_get at lib/kobject.c:431 Feb 6 12:32:46 taren kernel: Call Trace: Feb 6 12:32:46 taren kernel: [] kobject_get+0x50/0x60 Feb 6 12:32:46 taren kernel: [] cdev_get+0x39/0x80 Feb 6 12:32:46 taren kernel: [] exact_lock+0xf/0x20 Feb 6 12:32:46 taren kernel: [] kobj_lookup+0xf5/0x1a0 Feb 6 12:32:46 taren kernel: [] exact_match+0x0/0x10 Feb 6 12:32:46 taren kernel: [] chrdev_open+0x143/0x1c0 Feb 6 12:32:46 taren kernel: [] dentry_open+0x130/0x1e0 Feb 6 12:32:46 taren kernel: [] filp_open+0x68/0x70 Feb 6 12:32:46 taren kernel: [] sys_open+0x5b/0x90 Feb 6 12:32:46 taren kernel: [] syscall_call+0x7/0xb Feb 6 12:32:46 taren kernel: Feb 6 12:32:46 taren kernel: printing eip: Feb 6 12:32:46 taren kernel: c015beda Feb 6 12:32:46 taren kernel: Oops: 0002 [#1] Feb 6 12:32:46 taren kernel: CPU: 1 Feb 6 12:32:46 taren kernel: EIP: 0060:[] Not tainted Feb 6 12:32:46 taren kernel: EFLAGS: 00010246 Feb 6 12:32:46 taren kernel: EIP is at chrdev_open+0x1aa/0x1c0 Feb 6 12:32:46 taren kernel: eax: 00000000 ebx: e7b57120 ecx: e7b5715c edx: f713bd2c Feb 6 12:32:46 taren kernel: esi: 00000000 edi: 00000000 ebp: f713bc10 esp: d29bbf20 Feb 6 12:32:46 taren kernel: ds: 007b es: 007b ss: 0068 Feb 6 12:32:46 taren kernel: Process mt (pid: 5807, threadinfo=d29ba000 task=d6fb6670) Feb 6 12:32:46 taren kernel: Stack: f7fe2c00 00900000 d29bbf2c 00000000 dccb73a0f713bc10 ffffffe9 f7fe6760 Feb 6 12:32:46 taren kernel: c0151c70 f713bc10 dccb73a0 00000000 bffffdc4ef414000 d29ba000 c0151b38 Feb 6 12:32:46 taren kernel: f714eb60 f7fe6760 00000000 d29bbf70 f714eb60f7fe6760 fffffff4 ef414000 Feb 6 12:32:46 taren kernel: Call Trace: Feb 6 12:32:46 taren kernel: [] dentry_open+0x130/0x1e0 Feb 6 12:32:46 taren kernel: [] filp_open+0x68/0x70 Feb 6 12:32:46 taren kernel: [] sys_open+0x5b/0x90 Feb 6 12:32:46 taren kernel: [] syscall_call+0x7/0xb Feb 6 12:32:46 taren kernel: Feb 6 12:32:46 taren kernel: Code: 89 50 04 89 4a 04 e9 87 fe ff ff 8d 74 26 00 8d bc 27 00 00 Here are system specs: PIII Copermine dual cpu Both Megaraid and sym53c compiled monolithic. st is the only module on the system. ==== cat /proc/scsi/scsi Attached devices: Host: scsi1 Channel: 00 Id: 06 Lun: 00 Vendor: HP Model: C1537A Rev: L907 Type: Sequential-Access ANSI SCSI revision: 02 Host: scsi2 Channel: 00 Id: 00 Lun: 00 Vendor: MegaRAID Model: LD0 RAID1 17500R Rev: F Type: Direct-Access ANSI SCSI revision: 02 Host: scsi2 Channel: 00 Id: 01 Lun: 00 Vendor: MegaRAID Model: LD1 RAID1 8677R Rev: F Type: Direct-Access ANSI SCSI revision: 02 Host: scsi2 Channel: 04 Id: 05 Lun: 00 Vendor: HP Model: SAFTE; U160/M BP Rev: 1020 Type: Processor ANSI SCSI revision: 02 ==== cat /proc/scsi/sym53c8xx/* Chip sym53c896, device id 0xb, revision id 0x6 At PCI address 0000:02:06.0, IRQ 24 Min. period factor 10, Wide SCSI BUS Max. started commands 510, max. commands per LUN 64 Chip sym53c896, device id 0xb, revision id 0x6 At PCI address 0000:02:06.1, IRQ 25 Min. period factor 10, Wide SCSI BUS Max. started commands 510, max. commands per LUN 64 ======== Question: will compiling st into the kernel monolithically change this result? If possible, please reply to my email address below. If not, thanks for looking at this. -Phil Carinhas -- .--------------------------------------------------------. | Dr. Philip A. Carinhas | pac(at)fortuitous.com | | Fortuitous Technologies Inc. | http://fortuitous.com | | Linux Consulting & Training | Tel : 1-512-218-9561 | `--------------------------------------------------------'