From owner-freebsd-current@FreeBSD.ORG Sat Mar 10 06:49:45 2007 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 8B37416A408 for ; Sat, 10 Mar 2007 06:49:45 +0000 (UTC) (envelope-from mime@traveller.cz) Received: from nxm.secservers.com (nxm.secservers.com [89.185.226.22]) by mx1.freebsd.org (Postfix) with ESMTP id C99DB13C474 for ; Sat, 10 Mar 2007 06:49:44 +0000 (UTC) (envelope-from mime@traveller.cz) Received: from [127.0.0.1] (nxm.secservers.com. [89.185.226.22]) by nxm.secservers.com (8.13.4/8.13.8) with ESMTP id l2A6ncGQ097855; Sat, 10 Mar 2007 07:49:38 +0100 (CET) (envelope-from mime@traveller.cz) From: Michal Mertl To: Kostik Belousov In-Reply-To: <20070309125227.GB73957@deviant.kiev.zoral.com.ua> References: <1173353693.1523.7.camel@genius.i.cz> <20070308121301.GR10453@deviant.kiev.zoral.com.ua> <1173422820.1211.3.camel@genius.i.cz> <20070309125227.GB73957@deviant.kiev.zoral.com.ua> Content-Type: multipart/mixed; boundary="=-Hb0QOsDUFMgXzT+RCG+y" Date: Sat, 10 Mar 2007 07:49:32 +0100 Message-Id: <1173509372.1223.0.camel@genius.i.cz> Mime-Version: 1.0 X-Mailer: Evolution 2.8.2.1 FreeBSD GNOME Team Port Cc: freebsd-current , Rong-en Fan Subject: Re: Kernel panic - page fault in inodedep_find 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: Sat, 10 Mar 2007 06:49:45 -0000 --=-Hb0QOsDUFMgXzT+RCG+y Content-Type: text/plain Content-Transfer-Encoding: 7bit Kostik Belousov wrote: > On Fri, Mar 09, 2007 at 07:47:00AM +0100, Michal Mertl wrote: > > Kostik Belousov wrote: > > > On Thu, Mar 08, 2007 at 12:34:53PM +0100, Michal Mertl wrote: > > > > For a couple of days I am getting panics/freezes with GENERIC kernel (~2 > > > > days old as well as up-to-date CURRENT). The trace (when I get a chance > > > > to see it and when dump works) is attached. I have got crash dump so can > > > > provide more details as required. > > > > > > > > The panic seem to be provoked by heavier disk activity (running cvsup or > > > > similar). > > > > > > > > The machine is AMD64 SMP. > > > > > > > > Thanks > > > > > > > > Michal > > > > > > > > > > > > Fatal trap 12: page fault while in kernel mode > > > > cpuid = 1; apic id = 01 > > > > fault virtual address = 0x50 > > > > fault code = supervisor read data, page not present > > > > instruction pointer = 0x8:0xffffffff8059c175 > > > > stack pointer = 0x10:0xffffffffaf6b8380 > > > > frame pointer = 0x10:0xffffffffaf6b8390 > > > > code segment = base 0x0, limit 0xfffff, type 0x1b > > > > = DPL 0, pres 1, long 1, def32 0, gran 1 > > > > processor eflags = interrupt enabled, resume, IOPL = 0 > > > > current process = 1194 (cvs) > > > > trap number = 12 > > > > panic: page fault > > > > cpuid = 1 > > > > KDB: stack backtrace: > > > > db_trace_self_wrapper() at db_trace_self_wrapper+0x3a > > > > panic() at panic+0x22f > > > > trap_fatal() at trap_fatal+0x2a9 > > > > trap_pfault() at trap_pfault+0x235 > > > > trap() at trap+0x22e > > > > calltrap() at calltrap+0x8 > > > > --- trap 0xc, rip = 0xffffffff8059c175, rsp = 0xffffffffaf6b8380, rbp = > > > > 0xffffffffaf6b8390 --- > > > > inodedep_find() at inodedep_find+0x12 > > > > inodedep_lookup() at inodedep_lookup+0x81 > > > > softdep_setup_inomapdep() at softdep_setup_inomapdep+0x48 > > > > ffs_nodealloccg() at ffs_nodealloccg+0x3a6 > > > > ffs_hashalloc() at ffs_hashalloc+0x62 > > > > ffs_valloc() at ffs_valloc+0xde > > > > ufs_makeinode() at ufs_makeinode+0x6b > > > > ufs_create() at ufs_create+0x28 > > > > VOP_CREATE_APV() at VOP_CREATE_APV+0x72 > > > > vn_open_cred() at vn_open_cred+0x4b1 > > > > kern_open() at kern_open+0x101 > > > > syscall() at syscall+0x1f0 > > > > Xfast_syscall() at Xfast_syscall+0xab > > > > --- syscall (5, FreeBSD ELF64, open), rip = 0x8013b8c7c, rsp = > > > > 0x7fffffffe0a8, rbp = 0x10 --- > > > > Uptime: 1m40s > > > > Physical memory: 2034 MB > > > > Dumping 213 MB: 198 182 166 150 134 118 102 86 70 54 38 22 6 > > > > > > > > > > > > -------------------------- > > > > > > > > #0 doadump () at pcpu.h:141 > > > > 141 pcpu.h: No such file or directory. > > > > in pcpu.h > > > > (kgdb) bt > > > > #0 doadump () at pcpu.h:141 > > > > #1 0xffffffff80438920 in boot (howto=260) > > > > at ../../../kern/kern_shutdown.c:409 > > > > #2 0xffffffff804383b7 in panic (fmt=0xffffffff80690d22 "%s") > > > > at ../../../kern/kern_shutdown.c:563 > > > > #3 0xffffffff8063ebc9 in trap_fatal (frame=0xc, > > > > eva=18446742975751987856) at ../../../amd64/amd64/trap.c:696 > > > > #4 0xffffffff8063ef39 in trap_pfault (frame=0xffffffffaf6b82d0, > > > > usermode=0) at ../../../amd64/amd64/trap.c:614 > > > > #5 0xffffffff8063f16e in trap (frame=0xffffffffaf6b82d0) > > > > at ../../../amd64/amd64/trap.c:382 > > > > #6 0xffffffff806278ee in calltrap () > > > > at ../../../amd64/amd64/exception.S:169 > > > > #7 0xffffffff8059c175 in inodedep_find (inodedephd=0xffffffff8106d660, > > > > fs=0xffffff0061a4d800, inum=168358, inodedeppp=0xffff ffffaf6b83e0) > > > > at ../../../ufs/ffs/ffs_softdep.c:1246 > > > Please, from this frame (#7) do > > > p/x *inodedep > > > p/x *inodedephd > > > > 1246 LIST_FOREACH(inodedep, inodedephd, id_hash) > > Current language: auto; currently c > > (kgdb) p/x *inodedep > > Cannot access memory at address 0x18 > > (kgdb) p/x *inodedephd > > $1 = {lh_first = 0x18} > > Ok, this seems to be exactly the same problem as Rong-en' one, even the > corrupted value is the same. > > For start, could you, please, show your dmesg ? > > Rong-en, it seems that I forgot to answer your question about the way to > find whether the given kernel address is mapped, that stalled the conversation. > I apologize for that. It looks that the easiest would be to use > pmap_extract(vmspace_pmap(curproc->p_vmspace), addr) > to check validity of address addr, that shall return 0 for non-mapped address > (modulo the usual races, that should be not important in that case). Just to be sure the problem had not been fixed by now I have updated the sources and rebuilt and got similar panic again: [GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"] GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "amd64-marcel-freebsd". Unread portion of the kernel message buffer: Kernel page fault with the following non-sleepable locks held: exclusive sleep mutex Softdep Lock r = 0 (0xffffffff809e8920) locked @ ufs/ffs/ffs_softdep.c:4847 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x3a witness_warn() at witness_warn+0x25d trap() at trap+0x19c calltrap() at calltrap+0x8 --- trap 0xc, rip = 0xffffffff8059c1ed, rsp = 0xffffffffac1f34f0, rbp = 0xffffffffac1f3500 --- inodedep_find() at inodedep_find+0x12 inodedep_lookup() at inodedep_lookup+0x81 softdep_load_inodeblock() at softdep_load_inodeblock+0x45 ffs_vget() at ffs_vget+0x369 ufs_lookup() at ufs_lookup+0x838 VOP_CACHEDLOOKUP_APV() at VOP_CACHEDLOOKUP_APV+0x6e vfs_cache_lookup() at vfs_cache_lookup+0xf6 VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0x7a lookup() at lookup+0x3d2 namei() at namei+0x364 kern_lstat() at kern_lstat+0x62 lstat() at lstat+0x2a syscall() at syscall+0x1fc Xfast_syscall() at Xfast_syscall+0xab --- syscall (190, FreeBSD ELF64, lstat), rip = 0x8009e1bfc, rsp = 0x73ec50, rbp = 0x73ed28 --- Fatal trap 12: page fault while in kernel mode cpuid = 1; apic id = 01 fault virtual address = 0x50 fault code = supervisor read data, page not present instruction pointer = 0x8:0xffffffff8059c1ed stack pointer = 0x10:0xffffffffac1f34f0 frame pointer = 0x10:0xffffffffac1f3500 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 1162 (cvsup) trap number = 12 panic: page fault cpuid = 1 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x3a panic() at panic+0x22f trap_fatal() at trap_fatal+0x2a9 trap() at trap+0x1b4 calltrap() at calltrap+0x8 --- trap 0xc, rip = 0xffffffff8059c1ed, rsp = 0xffffffffac1f34f0, rbp = 0xffffffffac1f3500 --- inodedep_find() at inodedep_find+0x12 inodedep_lookup() at inodedep_lookup+0x81 softdep_load_inodeblock() at softdep_load_inodeblock+0x45 ffs_vget() at ffs_vget+0x369 ufs_lookup() at ufs_lookup+0x838 VOP_CACHEDLOOKUP_APV() at VOP_CACHEDLOOKUP_APV+0x6e vfs_cache_lookup() at vfs_cache_lookup+0xf6 VOP_LOOKUP_APV() at VOP_LOOKUP_APV+0x7a lookup() at lookup+0x3d2 namei() at namei+0x364 kern_lstat() at kern_lstat+0x62 lstat() at lstat+0x2a syscall() at syscall+0x1fc Xfast_syscall() at Xfast_syscall+0xab --- syscall (190, FreeBSD ELF64, lstat), rip = 0x8009e1bfc, rsp = 0x73ec50, rbp = 0x73ed28 --- Uptime: 1m43s Physical memory: 2034 MB Dumping 226 MB: 211 195 179 163 147 131 115 99 83 67 51 35 19 3 #0 doadump () at pcpu.h:141 141 pcpu.h: No such file or directory. in pcpu.h (kgdb) bt #0 doadump () at pcpu.h:141 #1 0xffffffff804388d0 in boot (howto=260) at ../../../kern/kern_shutdown.c:409 #2 0xffffffff80438367 in panic (fmt=0xffffffff80690d62 "%s") at ../../../kern/kern_shutdown.c:563 #3 0xffffffff8063ec09 in trap_fatal (frame=0xc, eva=18446742976261089248) at ../../../amd64/amd64/trap.c:696 #4 0xffffffff8063f134 in trap (frame=0xffffffffac1f3440) at ../../../amd64/amd64/trap.c:247 #5 0xffffffff8062792e in calltrap () at ../../../amd64/amd64/exception.S:169 #6 0xffffffff8059c1ed in inodedep_find (inodedephd=0xffffffff8106d2a0, fs=0xffffff007a4cd000, inum=2214894, inodedeppp=0xffffffffac1f3550) at ../../../ufs/ffs/ffs_softdep.c:1246 #7 0xffffffff8059f7b3 in inodedep_lookup (mp=0xffffff0062128000, inum=2214894, flags=0, inodedeppp=0xffffffffac1f3550) at ../../../ufs/ffs/ffs_softdep.c:1278 #8 0xffffffff805a26e9 in softdep_load_inodeblock (ip=0xffffff0057e6bc00) at ../../../ufs/ffs/ffs_softdep.c:4848 #9 0xffffffff805a66fb in ffs_vget (mp=0xffffff0062128000, ino=1645379584, flags=1475706200, vpp=0xffffffffac1f3638) at ../../../ufs/ffs/ffs_vfsops.c:1419 #10 0xffffffff805affe2 in ufs_lookup (ap=0xffffffffac1f3740) at ../../../ufs/ufs/ufs_lookup.c:572 #11 0xffffffff8067c50c in VOP_CACHEDLOOKUP_APV (vop=0x18, a=0xffffffffac1f3740) at vnode_if.c:153 #12 0xffffffff8049e924 in vfs_cache_lookup (ap=0xffffffff8106d2a0) at vnode_if.h:82 #13 0xffffffff8067c678 in VOP_LOOKUP_APV (vop=0xffffffff808f77c0, a=0xffffffffac1f3840) at vnode_if.c:99 #14 0xffffffff804a4138 in lookup (ndp=0xffffffffac1f3960) at vnode_if.h:56 #15 0xffffffff804a4ee3 in namei (ndp=0xffffffffac1f3960) at ../../../kern/vfs_lookup.c:215 #16 0xffffffff804b4847 in kern_lstat (td=0xffffff007af967e0, path=0xffffff007a4cd000 "", pathseg=2214894, sbp=0xffffffffac1f3ac0) at ../../../kern/vfs_syscalls.c:2129 #17 0xffffffff804b491d in lstat (td=0xffffffff8106d2a0, uap=0xffffffffac1f3c00) at ../../../kern/vfs_syscalls.c:2112 #18 0xffffffff8063f78f in syscall (frame=0xffffffffac1f3c80) at ../../../amd64/amd64/trap.c:827 #19 0xffffffff80627adb in Xfast_syscall () at ../../../amd64/amd64/exception.S:272 #20 0x00000008009e1bfc in ?? () Previous frame inner to this frame (corrupt stack?) The contents of inodedep{hd,} at frame 6 is the same. Best regards Michal Mertl --=-Hb0QOsDUFMgXzT+RCG+y Content-Disposition: attachment; filename=dmesg.txt Content-Type: text/plain; name=dmesg.txt; charset=ISO-8859-2 Content-Transfer-Encoding: 7bit Copyright (c) 1992-2007 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD is a registered trademark of The FreeBSD Foundation. FreeBSD 7.0-CURRENT #0: Fri Mar 9 18:02:27 CET 2007 mime@genius.i.cz:/usr/src/sys/amd64/compile/GENERIC WARNING: WITNESS option enabled, expect reduced performance. Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: Intel(R) Core(TM)2 CPU T7200 @ 2.00GHz (1995.01-MHz K8-class CPU) Origin = "GenuineIntel" Id = 0x6f6 Stepping = 6 Features=0xbfebfbff Features2=0xe3bd> AMD Features=0x20100800 AMD Features2=0x1 Cores per package: 2 usable memory = 2133434368 (2034 MB) avail memory = 2058903552 (1963 MB) ACPI APIC Table: FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC ID: 1 ioapic0: Changing APIC ID to 1 ioapic0 irqs 0-23 on motherboard kbd1 at kbdmux0 ath_hal: 0.9.20.3 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413) acpi0: on motherboard acpi0: [ITHREAD] acpi_ec0: port 0x62,0x66 on acpi0 acpi_bus_number: can't get _ADR message repeated 5 times acpi0: Power Button (fixed) Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0 cpu0: on acpi0 est0: on cpu0 p4tcc0: on cpu0 cpu1: on acpi0 est1: on cpu1 p4tcc1: on cpu1 acpi_lid0: on acpi0 acpi_button0: on acpi0 pcib0: port 0xcf8-0xcff on acpi0 pci0: on pcib0 pcib1: irq 16 at device 1.0 on pci0 pci1: on pcib1 vgapci0: port 0x2000-0x20ff mem 0xd8000000-0xdfffffff,0xee000000-0xee00ffff irq 16 at device 0.0 on pci1 pcm0: mem 0xee400000-0xee403fff irq 17 at device 27.0 on pci0 pcm0: [ITHREAD] pcib2: irq 20 at device 28.0 on pci0 pci2: on pcib2 pci2:0:0: bad VPD cksum, remain 14 bge0: mem 0xee100000-0xee10ffff irq 16 at device 0.0 on pci2 miibus0: on bge0 brgphy0: PHY 1 on miibus0 brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, 1000baseTX-FDX, auto bge0: Ethernet address: 00:16:36:ae:b6:b0 bge0: [ITHREAD] pcib3: irq 21 at device 28.1 on pci0 pci3: on pcib3 ath0: mem 0xedf00000-0xedf0ffff irq 17 at device 0.0 on pci3 ath0: [ITHREAD] ath0: using obsoleted if_watchdog interface ath0: Ethernet address: 00:16:cf:c2:00:cf ath0: mac 10.3 phy 6.1 radio 10.2 pcib4: irq 22 at device 28.2 on pci0 pci4: on pcib4 pcib5: irq 23 at device 28.3 on pci0 pci12: on pcib5 uhci0: port 0x1800-0x181f irq 16 at device 29.0 on pci0 uhci0: [GIANT-LOCKED] uhci0: [ITHREAD] usb0: on uhci0 usb0: USB revision 1.0 uhub0: on usb0 uhub0: 2 ports with 2 removable, self powered uhci1: port 0x1820-0x183f irq 17 at device 29.1 on pci0 uhci1: [GIANT-LOCKED] uhci1: [ITHREAD] usb1: on uhci1 usb1: USB revision 1.0 uhub1: on usb1 uhub1: 2 ports with 2 removable, self powered uhci2: port 0x1840-0x185f irq 18 at device 29.2 on pci0 uhci2: [GIANT-LOCKED] uhci2: [ITHREAD] usb2: on uhci2 usb2: USB revision 1.0 uhub2: on usb2 uhub2: 2 ports with 2 removable, self powered uhci3: port 0x1860-0x187f irq 19 at device 29.3 on pci0 uhci3: [GIANT-LOCKED] uhci3: [ITHREAD] usb3: on uhci3 usb3: USB revision 1.0 uhub3: on usb3 uhub3: 2 ports with 2 removable, self powered ehci0: mem 0xee404000-0xee4043ff irq 19 at device 29.7 on pci0 ehci0: [GIANT-LOCKED] ehci0: [ITHREAD] usb4: EHCI version 1.0 usb4: companion controllers, 2 ports each: usb0 usb1 usb2 usb3 usb4: on ehci0 usb4: USB revision 2.0 uhub4: on usb4 uhub4: 8 ports with 8 removable, self powered uhub5: on uhub4 uhub5: single transaction translator uhub5: 2 ports with 2 removable, self powered ugen0: on uhub5 pcib6: at device 30.0 on pci0 pci21: on pcib6 cbb0: mem 0xe4300000-0xe4300fff irq 16 at device 0.0 on pci21 cardbus0: on cbb0 pccard0: <16-bit PCCard bus> on cbb0 cbb0: [ITHREAD] fwohci0: <1394 Open Host Controller Interface> mem 0xe4302000-0xe43027ff,0xe4304000-0xe4307fff irq 17 at device 0.1 on pci21 fwohci0: [ITHREAD] fwohci0: OHCI version 1.10 (ROM=0) fwohci0: No. of Isochronous channels is 4. fwohci0: EUI64 00:06:1b:00:20:25:07:19 fwohci0: Phy 1394a available S400, 2 ports. fwohci0: Link S400, max_rec 2048 bytes. firewire0: on fwohci0 fwe0: on firewire0 if_fwe0: Fake Ethernet address: 02:06:1b:25:07:19 fwe0: Ethernet address: 02:06:1b:25:07:19 fwe0: if_start running deferred for Giant sbp0: on firewire0 fwohci0: Initiate bus reset fwohci0: node_id=0xc000ffc0, gen=1, CYCLEMASTER mode firewire0: 1 nodes, maxhop <= 0, cable IRM = 0 (me) firewire0: bus manager 0 (me) pci21: at device 0.2 (no driver attached) pci21: at device 0.3 (no driver attached) isab0: at device 31.0 on pci0 isa0: on isab0 atapci0: port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x1880-0x188f at device 31.1 on pci0 ata0: on atapci0 ata0: [ITHREAD] ata1: on atapci0 ata1: [ITHREAD] atapci1: port 0x18c8-0x18cf,0x18ac-0x18af,0x18c0-0x18c7,0x18a8-0x18ab,0x18b0-0x18bf mem 0xee404400-0xee4047ff irq 16 at device 31.2 on pci0 atapci1: [ITHREAD] atapci1: AHCI Version 01.10 controller with 4 ports detected ata2: on atapci1 ata2: [ITHREAD] ata3: on atapci1 ata3: port not implemented ata3: [ITHREAD] ata4: on atapci1 ata4: port not implemented ata4: [ITHREAD] ata5: on atapci1 ata5: port not implemented ata5: [ITHREAD] pci0: at device 31.3 (no driver attached) acpi_dock0: on acpi0 acpi_tz0: on acpi0 acpi_tz1: on acpi0 acpi_hpet0: iomem 0xfed00000-0xfed003ff on acpi0 Timecounter "HPET" frequency 14318180 Hz quality 2000 atkbdc0: port 0x60,0x64 irq 1 on acpi0 atkbd0: irq 1 on atkbdc0 kbd0 at atkbd0 atkbd0: [GIANT-LOCKED] atkbd0: [ITHREAD] psm0: irq 12 on atkbdc0 psm0: [GIANT-LOCKED] psm0: [ITHREAD] psm0: model Synaptics Touchpad, device ID 0 sio0: configured irq 3 not in bitmap of probed irqs 0 sio0: port may not be enabled sio0: configured irq 3 not in bitmap of probed irqs 0 sio0: port may not be enabled sio0: port 0x2f8-0x2ff irq 3 drq 3 flags 0x10 on acpi0 sio0: type 16550A sio0: [FILTER] battery0: on acpi0 acpi_acad0: on acpi0 acpi_ibm0: on acpi0 orm0: at iomem 0xd1800-0xd27ff,0xdc000-0xdffff,0xe0000-0xeffff on isa0 ppc0: cannot reserve I/O port range sc0: at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> vga0: at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 ums0: on uhub1 ums0: 3 buttons and Z dir. ugen1: on uhub2 Timecounters tick every 1.000 msec acd0: DVDR at ata0-master UDMA33 ad4: 114473MB at ata2-master SATA150 pcm0: pcm0: GEOM_LABEL: Label for provider ad4s1 is ntfs/Preload. GEOM_LABEL: Label for provider ad4s3 is msdosfs/ . SMP: AP CPU #1 Launched! cd0 at ata0 bus 0 target 0 lun 0 cd0: Removable CD-ROM SCSI-0 device cd0: 33.000MB/s transfers cd0: Attempt to query device size failed: NOT READY, Medium not present Trying to mount root from ufs:/dev/ad4s2a --=-Hb0QOsDUFMgXzT+RCG+y--