From owner-freebsd-current@FreeBSD.ORG Fri Jun 3 14:10:16 2005 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 649EE16A41C for ; Fri, 3 Jun 2005 14:10:16 +0000 (GMT) (envelope-from freebsd-current@m.gmane.org) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id D6BB143D1F for ; Fri, 3 Jun 2005 14:10:15 +0000 (GMT) (envelope-from freebsd-current@m.gmane.org) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1DeCln-0006HP-2R for freebsd-current@freebsd.org; Fri, 03 Jun 2005 16:03:31 +0200 Received: from mulder.f5.com ([205.229.151.150]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 03 Jun 2005 16:03:31 +0200 Received: from atkin901 by mulder.f5.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 03 Jun 2005 16:03:31 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: freebsd-current@freebsd.org From: othermark Date: Fri, 03 Jun 2005 07:03:07 -0700 Lines: 57 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7Bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: mulder.f5.com User-Agent: KNode/0.9.0 Sender: news Subject: LOR from vm_map_lookup() leads to fatal trap: X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 03 Jun 2005 14:10:16 -0000 I have not seen this before, from -current built from 6/31/2005. This was NOT found on the LOR page (http://sources.zabbadoz.net/freebsd/lor.html), so I'm posting it here. lock order reversal 1st 0xc15f8e68 process lock (process lock) @ /usr/src/sys/kern/kern_time.c:595 2nd 0xc0a00a64 user map (user map) @ /usr/src/sys/vm/vm_map.c:2997 KDB: stack backtrace: kdb_backtrace(c093c54a,c0a00a64,c0954678,c0954678,c09546f8) at kdb_backtrace+0x2e witness_checkorder(c0a00a64,9,c09546f8,bb5,c151fd80) at witness_checkorder+0x6ba _sx_xlock(c0a00a64,c09546f8,bb5,c06a1a26,cc01b9f0) at _sx_xlock+0x7e _vm_map_lock_read(c0a00a20,c09546f8,bb5,15101dd,0) at _vm_map_lock_read+0x4a vm_map_lookup(cc01ba88,0,1,cc01ba8c,cc01ba7c) at vm_map_lookup+0x38 vm_fault(c0a00a20,0,1,0,c151fd80) at vm_fault+0x7f trap_pfault(cc01bb70,0,aa8,c0a33a80,aa8) at trap_pfault+0xf1 trap(c0a10008,c0a10028,28,c0938bcb,6ab) at trap+0x35e calltrap() at calltrap+0x5 --- trap 0xc, eip = 0xc068fc66, esp = 0xcc01bbb0, ebp = 0xcc01bbd0 --- _mtx_lock_flags(aa8,0,c0938bcb,6ab,c15f8f38) at _mtx_lock_flags+0x46 do_tdsignal(c1547c00,e,0,0,c0938bcb) at do_tdsignal+0x119 tdsignal(c1547c00,e,0,654) at tdsignal+0x4d psignal(c15f8e00,e,c0939794,253,cc01bc88) at psignal+0x83 realitexpire(c15f8e00,0,c093992c,105,c06a7ed0) at realitexpire+0x3f softclock(0,0,c093620e,256,c0a02780) at softclock+0x24e ithread_loop(c1517780,cc01bd38,c0935ff9,30d,0) at ithread_loop+0x172 fork_exit(c0682920,c1517780,cc01bd38) at fork_exit+0xc1 fork_trampoline() at fork_trampoline+0x8 --- trap 0x1, eip = 0, esp = 0xcc01bd6c, ebp = 0 --- Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0xaa8 fault code = supervisor read, page not present instruction pointer = 0x20:0xc068fc66 stack pointer = 0x28:0xcc01bbb0 frame pointer = 0x28:0xcc01bbd0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 28 (swi4: clock sio) [thread pid 28 tid 100029 ] Stopped at _mtx_lock_flags+0x46: cmpl $0xc099d624,0(%ebx) db> show alllocks Process 28 (swi4: clock sio) thread 0xc151fd80 (100029) exclusive sleep mutex process lock r = 0 (0xc15f8e68) locked @ /usr/src/sys/kern/kern_time.c:595 -- othermark atkin901 at nospam dot yahoo dot com (!wired)?(coffee++):(wired);