From owner-freebsd-bugs@FreeBSD.ORG Sun Jan 22 17:50:04 2006 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B022616A41F for ; Sun, 22 Jan 2006 17:50:04 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2C47C43D49 for ; Sun, 22 Jan 2006 17:50:04 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id k0MHo3Ij018138 for ; Sun, 22 Jan 2006 17:50:04 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id k0MHo3fT018137; Sun, 22 Jan 2006 17:50:03 GMT (envelope-from gnats) Resent-Date: Sun, 22 Jan 2006 17:50:03 GMT Resent-Message-Id: <200601221750.k0MHo3fT018137@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Attila Nagy Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5AA6116A41F for ; Sun, 22 Jan 2006 17:45:19 +0000 (GMT) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [216.136.204.117]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2C80F43D45 for ; Sun, 22 Jan 2006 17:45:19 +0000 (GMT) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.13.1/8.13.1) with ESMTP id k0MHjJm5020936 for ; Sun, 22 Jan 2006 17:45:19 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.13.1/8.13.1/Submit) id k0MHjIjq020935; Sun, 22 Jan 2006 17:45:19 GMT (envelope-from nobody) Message-Id: <200601221745.k0MHjIjq020935@www.freebsd.org> Date: Sun, 22 Jan 2006 17:45:19 GMT From: Attila Nagy To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-2.3 Cc: Subject: kern/92164: SCSI target mode LOR X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 22 Jan 2006 17:50:04 -0000 >Number: 92164 >Category: kern >Synopsis: SCSI target mode LOR >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Jan 22 17:50:03 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Attila Nagy >Release: 7-CURRENT >Organization: - >Environment: 7-CURRENT as of today. >Description: I'm doing some experiments with FreeBSD target mode support on Fibre Channel and thought that I should give CURRENT a try too. The machine itself is an HP BL25p with 8 GB of RAM (but hw.physmem set to under 4G, it seems the isp driver needs this) and dual Opterons. Running amd64 code. This is what I get after issuing scsi_target -A -S -T -W 32 2:0:0 /data/file1 lock order reversal: (sleepable after non-sleepable) 1st 0xffffffff808ce680 targ global (targ global) @ /usr/src/sys/cam/scsi/scsi_target.c:418 2nd 0xffffffff808e98c0 kernel environment (kernel environment) @ /usr/src/sys/kern/subr_hints.c:117 KDB: stack backtrace: witness_checkorder() at witness_checkorder+0x4f9 _sx_slock() at _sx_slock+0x4d res_find() at res_find+0x41a resource_find() at resource_find+0x7e resource_find_dev() at resource_find_dev+0x5f cam_periph_alloc() at cam_periph_alloc+0x1df targioctl() at targioctl+0x3a7 giant_ioctl() at giant_ioctl+0x65 devfs_ioctl_f() at devfs_ioctl_f+0x6f ioctl() at ioctl+0x147 syscall() at syscall+0x517 Xfast_syscall() at Xfast_syscall+0xa8 --- syscall (54, FreeBSD ELF64, ioctl), rip = 0x800909aac, rsp = 0x7fffffffbb98, rbp = 0x7fffffffe700 --- >How-To-Repeat: >Fix: 6-STABLE works, at least the above command can be used without a LOR or panic. But there are some other concerns with target mode, which could be improved. >Release-Note: >Audit-Trail: >Unformatted: