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Date: 20 Sep 2003 22:28:05 -0000
From: Antti Louko <alo@alo.louko.com>
Reply-To: Antti Louko <alo@alo.louko.com>
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: sysctl -a panics, kern.disks shows detached umass device
X-Send-Pr-Version: 3.113
X-GNATS-Notify:

>Number:         57044
>Category:       kern
>Synopsis:       sysctl -a panics, kern.disks shows detached umass device
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 20 15:30:19 PDT 2003
>Closed-Date:    Fri Jun 25 22:46:16 GMT 2004
>Last-Modified:  Fri Jun 25 22:46:16 GMT 2004
>Originator:     Antti Louko
>Release:        FreeBSD 5.1-RELEASE i386
>Organization:
>Environment:
System: FreeBSD xxxx.louko.com 5.1-RELEASE FreeBSD 5.1-RELEASE #1: Sat Sep 13 01:50:06 EEST 2003 root@xxxx.louko.com:/usr/src/sys/i386/compile/LEX2 i386

>Description:

USB disk attaching and removal doesn't work.

>How-To-Repeat:

# sysctl kern.disks
kern.disks: ad2

Attach a USB CF disk:

umass0: Apacer HandyDrive, rev 1.10/1.00, addr 2
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <Apacer HandyDrive 2.08> Removable Direct Access SCSI-0 device 
da0: 1.000MB/s transfers
da0: 31MB (64000 512 byte sectors: 64H 32S/T 31C)
	
# sysctl -a > /dev/null       # OK
# sysctl kern.disks
kern.disks: da0 ad2

Detach the USB disk:

umass0: at uhub1 port 1 (addr 2) disconnected
(da0:umass-sim0:0:0:0): lost device
(da0:umass-sim0:0:0:0): removing device entry
umass0: detached

# sysctl kern.disks
kern.disks: da0 ad2            # Wrong

# sysctl -a > /dev/null

panics in g_disk_dumpconf.  gp->softc is NULL.

Config file below:

machine		i386
cpu		I486_CPU
cpu		I586_CPU
cpu		I686_CPU
ident		"LEX2"

#To statically compile in device wiring instead of /boot/device.hints
#hints		"GENERIC.hints"		#Default places to look for devices.

#makeoptions	DEBUG=-g		#Build kernel with gdb(1) debug symbols

options 	SCHED_4BSD		#4BSD scheduler
options 	INET			#InterNETworking
options 	INET6			#IPv6 communications protocols
options 	FFS			#Berkeley Fast Filesystem
options 	SOFTUPDATES		#Enable FFS soft updates support
options 	UFS_ACL			#Support for access control lists
options 	UFS_DIRHASH		#Improve performance on big directories
options 	MD_ROOT			#MD is a potential root device
options 	NFSCLIENT		#Network Filesystem Client
options 	NFSSERVER		#Network Filesystem Server
options 	NFS_ROOT		#NFS usable as root device, requires NFSCLIENT
options 	MSDOSFS			#MSDOS Filesystem
options 	CD9660			#ISO 9660 Filesystem
options 	PROCFS			#Process filesystem (requires PSEUDOFS)
options 	PSEUDOFS		#Pseudo-filesystem framework
options 	COMPAT_43		#Compatible with BSD 4.3 [KEEP THIS!]
options 	COMPAT_FREEBSD4		#Compatible with FreeBSD4
options 	SCSI_DELAY=15000	#Delay (in ms) before probing SCSI
options 	KTRACE			#ktrace(1) support
options 	SYSVSHM			#SYSV-style shared memory
options 	SYSVMSG			#SYSV-style message queues
options 	SYSVSEM			#SYSV-style semaphores
options 	_KPOSIX_PRIORITY_SCHEDULING #Posix P1003_1B real-time extensions
options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
options 	AHC_REG_PRETTY_PRINT	# Print register bitfields in debug
					# output.  Adds ~128k to driver.
options 	AHD_REG_PRETTY_PRINT	# Print register bitfields in debug
					# output.  Adds ~215k to driver.

# Debugging for use in -current
#options 	DDB			#Enable the kernel debugger
#options 	INVARIANTS		#Enable calls of extra sanity checking
options 	INVARIANT_SUPPORT	#Extra sanity checks of internal structures, required by INVARIANTS
#options 	WITNESS			#Enable checks to detect deadlocks and cycles
#options 	WITNESS_SKIPSPIN	#Don't run witness on spinlocks for speed

# To make an SMP kernel, the next two are needed
#options 	SMP			# Symmetric MultiProcessor Kernel
#options 	APIC_IO			# Symmetric (APIC) I/O

device		isa
device		eisa
device		pci

# Floppy drives
device		fdc

# ATA and ATAPI devices
device		ata
device		atadisk			# ATA disk drives
device		atapicd			# ATAPI CDROM drives
device		atapifd			# ATAPI floppy drives
device		atapist			# ATAPI tape drives
options 	ATA_STATIC_ID		#Static device numbering

# SCSI Controllers
device		ahb		# EISA AHA1742 family
device		ahc		# AHA2940 and onboard AIC7xxx devices
device		ahd		# AHA39320/29320 and onboard AIC79xx devices
device		amd		# AMD 53C974 (Tekram DC-390(T))
device		isp		# Qlogic family
device		mpt		# LSI-Logic MPT-Fusion
#device		ncr		# NCR/Symbios Logic
device		sym		# NCR/Symbios Logic (newer chipsets + those of `ncr')
device		trm		# Tekram DC395U/UW/F DC315U adapters

device		adv		# Advansys SCSI adapters
device		adw		# Advansys wide SCSI adapters
device		aha		# Adaptec 154x SCSI adapters
device		aic		# Adaptec 15[012]x SCSI adapters, AIC-6[23]60.
device		bt		# Buslogic/Mylex MultiMaster SCSI adapters

device		ncv		# NCR 53C500
device		nsp		# Workbit Ninja SCSI-3
device		stg		# TMC 18C30/18C50

# RAID controllers interfaced to the SCSI subsystem
device		asr		# DPT SmartRAID V, VI and Adaptec SCSI RAID
device		ciss		# Compaq Smart RAID 5*
device		dpt		# DPT Smartcache III, IV - See NOTES for options!
device		iir		# Intel Integrated RAID
device		mly		# Mylex AcceleRAID/eXtremeRAID

# SCSI peripherals
device		scbus		# SCSI bus (required)
device		ch		# SCSI media changers
device		da		# Direct Access (disks)
device		sa		# Sequential Access (tape etc)
device		cd		# CD
device		pass		# Passthrough device (direct SCSI access)
device		ses		# SCSI Environmental Services (and SAF-TE)

# RAID controllers
device		aac		# Adaptec FSA RAID
device		aacp		# SCSI passthrough for aac (requires CAM)
device		amr		# AMI MegaRAID
device		ida		# Compaq Smart RAID
device		ips		# IBM (Adaptec) ServeRAID
device		mlx		# Mylex DAC960 family
device		pst		# Promise Supertrak SX6000
device		twe		# 3ware ATA RAID

# atkbdc0 controls both the keyboard and the PS/2 mouse
device		atkbdc		# AT keyboard controller
device		atkbd		# AT keyboard
device		psm		# PS/2 mouse

device		vga		# VGA video card driver

device		splash		# Splash screen and screen saver support

# syscons is the default console driver, resembling an SCO console
device		sc

# Enable this for the pcvt (VT220 compatible) console driver
#device		vt
#options 	XSERVER			# support for X server on a vt console
#options 	FAT_CURSOR		# start with block cursor

device		agp		# support several AGP chipsets

# Floating point support - do not disable.
device		npx

# Power management support (see NOTES for more options)
#device		apm
# Add suspend/resume support for the i8254.
device		pmtimer

# PCCARD (PCMCIA) support
# Pcmcia and cardbus bridge support
device		cbb			# cardbus (yenta) bridge
#device		pcic			# ExCA ISA and PCI bridges
device		pccard			# PC Card (16-bit) bus
device		cardbus			# CardBus (32-bit) bus

# Serial (COM) ports
device		sio		# 8250, 16[45]50 based serial ports

# Parallel port
device		ppc
device		ppbus		# Parallel port bus (required)
device		lpt		# Printer
device		plip		# TCP/IP over parallel
device		ppi		# Parallel port interface device
#device		vpo		# Requires scbus and da


# PCI Ethernet NICs.
device		de		# DEC/Intel DC21x4x (``Tulip'')
device		em		# Intel PRO/1000 adapter Gigabit Ethernet Card
device		txp		# 3Com 3cR990 (``Typhoon'')
device		vx		# 3Com 3c590, 3c595 (``Vortex'')

# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device		miibus		# MII bus support
device		dc		# DEC/Intel 21143 and various workalikes
device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)
device		pcn		# AMD Am79C97x PCI 10/100 (precedence over 'lnc')
device		rl		# RealTek 8129/8139
device		sf		# Adaptec AIC-6915 (``Starfire'')
device		sis		# Silicon Integrated Systems SiS 900/SiS 7016
device		sk		# SysKonnect SK-984x and SK-982x gigabit ethernet
device		ste		# Sundance ST201 (D-Link DFE-550TX)
device		ti		# Alteon Networks Tigon I/II gigabit ethernet
device		tl		# Texas Instruments ThunderLAN
device		tx		# SMC EtherPower II (83c170 ``EPIC'')
device		vr		# VIA Rhine, Rhine II
device		wb		# Winbond W89C840F
device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')
device		bge		# Broadcom BCM570xx Gigabit Ethernet

# ISA Ethernet NICs.  pccard nics included.
device		cs		# Crystal Semiconductor CS89x0 NIC
# 'device ed' requires 'device miibus'
device		ed		# NE[12]000, SMC Ultra, 3c503, DS8390 cards
device		ex		# Intel EtherExpress Pro/10 and Pro/10+
device		ep		# Etherlink III based cards
device		fe		# Fujitsu MB8696x based cards
device		ie		# EtherExpress 8/16, 3C507, StarLAN 10 etc.
device		lnc		# NE2100, NE32-VL Lance Ethernet cards
device		sn		# SMC's 9000 series of ethernet chips
device		xe		# Xircom pccard ethernet

# ISA devices that use the old ISA shims
#device		le

# Wireless NIC cards
device		wlan		# 802.11 support
device		an		# Aironet 4500/4800 802.11 wireless NICs. 
device		awi		# BayStack 660 and others
device		wi		# WaveLAN/Intersil/Symbol 802.11 wireless NICs.
#device		wl		# Older non 802.11 Wavelan wireless NIC.

# Pseudo devices - the number indicates how many units to allocate.
device		random		# Entropy device
device		loop		# Network loopback
device		ether		# Ethernet support
device		sl		# Kernel SLIP
device		ppp		# Kernel PPP
device		tun		# Packet tunnel.
device		pty		# Pseudo-ttys (telnet etc)
device		md		# Memory "disks"
device		gif		# IPv6 and IPv4 tunneling
device		faith		# IPv6-to-IPv4 relaying (translation)

# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
device		bpf		# Berkeley packet filter

# USB support
device		uhci		# UHCI PCI->USB interface
device		ohci		# OHCI PCI->USB interface
device		usb		# USB Bus (required)
#device		udbp		# USB Double Bulk Pipe devices
device		ugen		# Generic
device		uhid		# "Human Interface Devices"
device		ukbd		# Keyboard
#### device		ulpt		# Printer
device		umass		# Disks/Mass storage - Requires scbus and da
device		ums		# Mouse
device		urio		# Diamond Rio 500 MP3 player
device		uscanner	# Scanners
# USB Ethernet, requires mii
device		aue		# ADMtek USB ethernet
device		axe		# ASIX Electronics USB ethernet
device		cue		# CATC USB ethernet
device		kue		# Kawasaki LSI USB ethernet

# FireWire support
device		firewire	# FireWire bus code
device		sbp		# SCSI over FireWire (Requires scbus and da)
device		fwe		# Ethernet over FireWire (non-standard!)

device		vlan

options 	INCLUDE_CONFIG_FILE     # Include this file in kernel
options 	IPFIREWALL		#firewall
options 	IPFIREWALL_FORWARD	#enable transparent proxy support
options 	IPDIVERT		#divert sockets
options		RANDOM_IP_ID


>Fix:
>Release-Note:
>Audit-Trail:

From: alo@iki.fi (Antti Louko)
To: FreeBSD-gnats-submit@FreeBSD.org
Cc:  
Subject: Re: kern/57044: sysctl -a panics, kern.disks shows detached umass device
Date: 21 Sep 2003 07:58:39 -0000

 A further note:
 
 The problem only occurs if the attached disk has fdisk partition
 table.  But without slices and partitions, the disk is quite useless.
 
 Here is kern.geom.debugflags=1 dmesg.  I added notes of sysctl
 commands and attachments and detachments.  There is one newfs:ed
 filesystem on da0s1c.
 
 Sep 21 07:50:20 lexi2 root: sysctl -a
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d7000, 0xc72f16c0, 262146
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d7000, 0xc72f16e0, 262146
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d7950, 0xc72f1680, 262146
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d7950, 0xc72f1640, 262146
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d72e0, 0xc72f1660, 262146
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d72e0, 0xc72f1620, 262146
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d7490, 0xc72f1600, 262146
 Sep 21 07:50:35 lexi2 kernel: g_post_event_x(0xc02d7490, 0xc72f15c0, 262146
 Sep 21 07:51:02 lexi2 root: attach da0
 Sep 21 07:51:10 lexi2 kernel: umass0: Apacer HandyDrive, rev 1.10/1.00, addr 2
 Sep 21 07:51:10 lexi2 kernel: g_post_event_x(0xc02d6e00, 0xc73c6050, 2
 Sep 21 07:51:10 lexi2 kernel: ref 0xc73c6050
 Sep 21 07:51:10 lexi2 kernel: g_post_event_x(0xc02da4b0, 0xc7622780, 2
 Sep 21 07:51:10 lexi2 kernel: da0 at umass-sim0 bus 0 target 0 lun 0
 Sep 21 07:51:10 lexi2 kernel: da0: <Apacer HandyDrive 2.08> Removable Direct Access SCSI-0 device 
 Sep 21 07:51:10 lexi2 kernel: da0: 1.000MB/s transfers
 Sep 21 07:51:10 lexi2 kernel: da0: 31MB (64000 512 byte sectors: 64H 32S/T 31C)
 Sep 21 07:51:10 lexi2 kernel: ref 0xc7622780
 Sep 21 07:51:10 lexi2 kernel: g_mbrext_taste(MBREXT,da0)
 Sep 21 07:51:10 lexi2 kernel: mbr_taste(MBR,da0)
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 0, 0)
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 1, 0)
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 2, 0)
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 3, 0)
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 0, 1)
 Sep 21 07:51:10 lexi2 kernel: g_post_event_x(0xc02da4b0, 0xc7622800, 2
 Sep 21 07:51:10 lexi2 kernel: ref 0xc7622800
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 1, 1)
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 2, 1)
 Sep 21 07:51:10 lexi2 kernel: g_slice_config(da0, 3, 1)
 Sep 21 07:51:10 lexi2 kernel: bsd_taste(BSD,da0)
 Sep 21 07:51:10 lexi2 kernel: g_slice_spoiled(0xc7616180/da0)
 Sep 21 07:51:10 lexi2 kernel: g_wither_geom(0xc7622b80(da0))
 Sep 21 07:51:10 lexi2 kernel: g_detach(0xc7616180)
 Sep 21 07:51:10 lexi2 kernel: g_destroy_consumer(0xc7616180)
 Sep 21 07:51:10 lexi2 kernel: g_destroy_geom(0xc7622b80(da0))
 Sep 21 07:51:10 lexi2 kernel: dev_taste(DEV,da0)
 Sep 21 07:51:10 lexi2 kernel: g_mbrext_taste(MBREXT,da0s1)
 Sep 21 07:51:10 lexi2 kernel: g_slice_spoiled(0xc7616200/da0s1)
 Sep 21 07:51:10 lexi2 kernel: g_wither_geom(0xc7622b00(da0s1))
 Sep 21 07:51:10 lexi2 kernel: g_detach(0xc7616200)
 Sep 21 07:51:10 lexi2 kernel: g_destroy_consumer(0xc7616200)
 Sep 21 07:51:10 lexi2 kernel: g_destroy_geom(0xc7622b00(da0s1))
 Sep 21 07:51:10 lexi2 kernel: mbr_taste(MBR,da0s1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_spoiled(0xc7410f00/da0s1)
 Sep 21 07:51:11 lexi2 kernel: g_wither_geom(0xc7622c00(da0s1))
 Sep 21 07:51:11 lexi2 kernel: g_detach(0xc7410f00)
 Sep 21 07:51:11 lexi2 kernel: g_destroy_consumer(0xc7410f00)
 Sep 21 07:51:11 lexi2 kernel: g_destroy_geom(0xc7622c00(da0s1))
 Sep 21 07:51:11 lexi2 kernel: bsd_taste(BSD,da0s1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 0, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 1, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 2, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 3, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 4, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 5, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 6, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 7, 0)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 0, 1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 1, 1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 2, 1)
 Sep 21 07:51:11 lexi2 kernel: g_post_event_x(0xc02da4b0, 0xc7622c00, 2
 Sep 21 07:51:11 lexi2 kernel: ref 0xc7622c00
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 3, 1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 4, 1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 5, 1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 6, 1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_config(da0s1, 7, 1)
 Sep 21 07:51:11 lexi2 kernel: g_slice_conf_hot(da0s1, idx: 0, off: 512, len: 276)
 Sep 21 07:51:11 lexi2 kernel: dev_taste(DEV,da0s1)
 Sep 21 07:51:11 lexi2 kernel: g_mbrext_taste(MBREXT,da0s1c)
 Sep 21 07:51:11 lexi2 kernel: mbr_taste(MBR,da0s1c)
 Sep 21 07:51:11 lexi2 kernel: g_slice_spoiled(0xc7616a00/da0s1c)
 Sep 21 07:51:11 lexi2 kernel: g_wither_geom(0xc7622680(da0s1c))
 Sep 21 07:51:11 lexi2 kernel: g_detach(0xc7616a00)
 Sep 21 07:51:11 lexi2 kernel: g_destroy_consumer(0xc7616a00)
 Sep 21 07:51:11 lexi2 kernel: g_destroy_geom(0xc7622680(da0s1c))
 Sep 21 07:51:11 lexi2 kernel: bsd_taste(BSD,da0s1c)
 Sep 21 07:51:11 lexi2 kernel: g_slice_spoiled(0xc7616580/da0s1c)
 Sep 21 07:51:11 lexi2 kernel: g_wither_geom(0xc7622b80(da0s1c))
 Sep 21 07:51:11 lexi2 kernel: g_detach(0xc7616580)
 Sep 21 07:51:11 lexi2 kernel: g_destroy_consumer(0xc7616580)
 Sep 21 07:51:11 lexi2 kernel: g_destroy_geom(0xc7622b80(da0s1c))
 Sep 21 07:51:11 lexi2 kernel: dev_taste(DEV,da0s1c)
 Sep 21 07:51:17 lexi2 root: attached da0
 Sep 21 07:51:30 lexi2 root: sysctl kern.disks
 Sep 21 07:51:32 lexi2 kernel: g_post_event_x(0xc02d7000, 0xc72f1880, 262146
 Sep 21 07:51:32 lexi2 kernel: g_post_event_x(0xc02d7000, 0xc72f1820, 262146
 Sep 21 07:51:41 lexi2 root: detach da0
 Sep 21 07:51:44 lexi2 kernel: umass0: at uhub1 port 1 (addr 2) disconnected
 Sep 21 07:51:44 lexi2 kernel: (da0:umass-sim0:0:0:0): lost device
 Sep 21 07:51:44 lexi2 kernel: (da0:umass-sim0:0:0:0): removing device entry
 Sep 21 07:51:44 lexi2 kernel: g_post_event_x(0xc02d6f60, 0xc7622600, 2
 Sep 21 07:51:44 lexi2 kernel: umass0: detached
 Sep 21 07:51:44 lexi2 kernel: g_wither_geom(0xc7622600(da0))
 Sep 21 07:51:44 lexi2 kernel: g_orphan_provider(0xc7622780(da0), 6)
 Sep 21 07:51:44 lexi2 kernel: g_orphan_register(da0)
 Sep 21 07:51:44 lexi2 kernel: g_dev_orphan(0xc76161c0(da0))
 Sep 21 07:51:44 lexi2 kernel: g_detach(0xc76161c0)
 Sep 21 07:51:44 lexi2 kernel: g_wither_geom(0xc7622600(da0))
 Sep 21 07:51:44 lexi2 kernel: g_destroy_consumer(0xc76161c0)
 Sep 21 07:51:44 lexi2 kernel: g_destroy_geom(0xc7622a00(da0))
 Sep 21 07:51:44 lexi2 kernel: g_slice_orphan(0xc742a5c0/da0)
 Sep 21 07:51:44 lexi2 kernel: g_wither_geom(0xc73f5300(da0))
 Sep 21 07:51:44 lexi2 kernel: g_orphan_provider(0xc7622800(da0s1), 6)
 Sep 21 07:51:44 lexi2 kernel: g_detach(0xc742a5c0)
 Sep 21 07:51:44 lexi2 kernel: g_destroy_consumer(0xc742a5c0)
 Sep 21 07:51:44 lexi2 kernel: g_orphan_register(da0s1)
 Sep 21 07:51:44 lexi2 kernel: g_dev_orphan(0xc742a4c0(da0s1))
 Sep 21 07:51:44 lexi2 kernel: g_detach(0xc742a4c0)
 Sep 21 07:51:44 lexi2 kernel: g_wither_geom(0xc73f5300(da0))
 Sep 21 07:51:44 lexi2 kernel: g_destroy_consumer(0xc742a4c0)
 Sep 21 07:51:44 lexi2 kernel: g_destroy_geom(0xc7622b00(da0s1))
 Sep 21 07:51:44 lexi2 kernel: g_slice_orphan(0xc742aa40/da0s1)
 Sep 21 07:51:44 lexi2 kernel: g_wither_geom(0xc7622080(da0s1))
 Sep 21 07:51:44 lexi2 kernel: g_orphan_provider(0xc7622c00(da0s1c), 6)
 Sep 21 07:51:44 lexi2 kernel: g_detach(0xc742aa40)
 Sep 21 07:51:44 lexi2 kernel: g_destroy_consumer(0xc742aa40)
 Sep 21 07:51:44 lexi2 kernel: g_orphan_register(da0s1c)
 Sep 21 07:51:44 lexi2 kernel: g_dev_orphan(0xc76166c0(da0s1c))
 Sep 21 07:51:44 lexi2 kernel: g_detach(0xc76166c0)
 Sep 21 07:51:44 lexi2 kernel: g_wither_geom(0xc7622080(da0s1))
 Sep 21 07:51:44 lexi2 kernel: g_destroy_geom(0xc7622080(da0s1))
 Sep 21 07:51:44 lexi2 kernel: g_destroy_consumer(0xc76166c0)
 Sep 21 07:51:44 lexi2 kernel: g_destroy_geom(0xc7622900(da0s1c))
 Sep 21 07:51:46 lexi2 root: sysctl kern.disks
 Sep 21 07:51:48 lexi2 kernel: g_post_event_x(0xc02d7000, 0xc72f16c0, 262146
 Sep 21 07:51:48 lexi2 kernel: g_post_event_x(0xc02d7000, 0xc72f1580, 262146
 
 After that sysctl -a panics in g_disk_dumpconf when gp->softc is NULL.

From: Antti Louko <alo@iki.fi.invalid>
To: freebsd-gnats-submit@FreeBSD.org
Cc:  
Subject: Re: kern/57044: sysctl -a panics, kern.disks shows detached umass device
Date: Sun, 07 Mar 2004 22:32:53 +0200

 I tested this again with -CURRENT.
 
 There is no crash anymore but the device stays in sysctl kern.disks
 and kern.geom.confxml.
 
 I think there should be a way to deconfigure a removable disk (USB,
 firewire) before physically detaching it.
State-Changed-From-To: open->closed 
State-Changed-By: le 
State-Changed-When: Fri Jun 25 22:46:03 GMT 2004 
State-Changed-Why:  
This issue is fixed in -current. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=57044 
>Unformatted:
