2.6.17-rc4 md lock held at task exit

[Keith Owens <kaos@ocs.com.au>]

Doing poweroff on 2.6.17-rc4 i386, SMP

BUG halt/4781, lock held at task exit time!
 [f7001b34] {mddev_find}
.. held by: halt: 4781 [f7cd4030, 118]
... acquired at: md_notify_reboot+0x3a/0xa9 [md_mod}

Config:

X86_32=y
SEMAPHORE_SLEEPERS=y
X86=y
MMU=y
GENERIC_ISA_DMA=y
GENERIC_IOMAP=y
GENERIC_HWEIGHT=y
ARCH_MAY_HAVE_PC_FDC=y
DMI=y
EXPERIMENTAL=y
LOCK_KERNEL=y
INIT_ENV_ARG_LIMIT=32
LOCALVERSION="-kaos"
SWAP=y
SYSVIPC=y
SYSCTL=y
RELAY=y
INITRAMFS_SOURCE=""
UID16=y
VM86=y
CC_OPTIMIZE_FOR_SIZE=y
KALLSYMS=y
KALLSYMS_ALL=y
HOTPLUG=y
PRINTK=y
BUG=y
ELF_CORE=y
BASE_FULL=y
FUTEX=y
EPOLL=y
SHMEM=y
SLAB=y
BASE_SMALL=0
MODULES=y
MODULE_UNLOAD=y
KMOD=y
STOP_MACHINE=y
LBD=y
IOSCHED_NOOP=y
DEFAULT_NOOP=y
DEFAULT_IOSCHED="noop"
SMP=y
X86_PC=y
M686=y
X86_CMPXCHG=y
X86_XADD=y
X86_L1_CACHE_SHIFT=5
RWSEM_XCHGADD_ALGORITHM=y
GENERIC_CALIBRATE_DELAY=y
X86_PPRO_FENCE=y
X86_WP_WORKS_OK=y
X86_INVLPG=y
X86_BSWAP=y
X86_POPAD_OK=y
X86_CMPXCHG64=y
X86_GOOD_APIC=y
X86_USE_PPRO_CHECKSUM=y
X86_TSC=y
HPET_TIMER=y
HPET_EMULATE_RTC=y
NR_CPUS=8
SCHED_SMT=y
SCHED_MC=y
PREEMPT=y
PREEMPT_BKL=y
X86_LOCAL_APIC=y
X86_IO_APIC=y
X86_MCE=y
X86_MCE_NONFATAL=y
X86_MCE_P4THERMAL=y
MICROCODE=m
X86_MSR=m
X86_CPUID=m
NOHIGHMEM=y
PAGE_OFFSET=0xC0000000
ARCH_FLATMEM_ENABLE=y
ARCH_SPARSEMEM_ENABLE=y
ARCH_SELECT_MEMORY_MODEL=y
SELECT_MEMORY_MODEL=y
FLATMEM_MANUAL=y
FLATMEM=y
FLAT_NODE_MEM_MAP=y
SPARSEMEM_STATIC=y
SPLIT_PTLOCK_CPUS=4
MTRR=y
IRQBALANCE=y
REGPARM=y
SECCOMP=y
HZ_250=y
HZ=250
PHYSICAL_START=0x100000
PCI=y
PCI_GOANY=y
PCI_BIOS=y
PCI_DIRECT=y
ISA_DMA_API=y
BINFMT_ELF=y
BINFMT_MISC=m
NET=y
PACKET=m
PACKET_MMAP=y
UNIX=y
INET=y
IP_FIB_HASH=y
SYN_COOKIES=y
INET_DIAG=y
INET_TCP_DIAG=y
TCP_CONG_BIC=y
NETFILTER=y
NETFILTER_NETLINK=m
NETFILTER_XTABLES=m
NETFILTER_XT_TARGET_CLASSIFY=m
NETFILTER_XT_TARGET_MARK=m
NETFILTER_XT_TARGET_NFQUEUE=m
NETFILTER_XT_TARGET_NOTRACK=m
NETFILTER_XT_MATCH_COMMENT=m
NETFILTER_XT_MATCH_CONNTRACK=m
NETFILTER_XT_MATCH_DCCP=m
NETFILTER_XT_MATCH_ESP=m
NETFILTER_XT_MATCH_HELPER=m
NETFILTER_XT_MATCH_LENGTH=m
NETFILTER_XT_MATCH_LIMIT=m
NETFILTER_XT_MATCH_MAC=m
NETFILTER_XT_MATCH_MARK=m
NETFILTER_XT_MATCH_MULTIPORT=m
NETFILTER_XT_MATCH_PKTTYPE=m
NETFILTER_XT_MATCH_REALM=m
NETFILTER_XT_MATCH_SCTP=m
NETFILTER_XT_MATCH_STATE=m
NETFILTER_XT_MATCH_STRING=m
NETFILTER_XT_MATCH_TCPMSS=m
IP_NF_CONNTRACK=m
IP_NF_CONNTRACK_NETLINK=m
IP_NF_FTP=m
IP_NF_IRC=m
IP_NF_H323=m
IP_NF_QUEUE=m
IP_NF_IPTABLES=m
IP_NF_MATCH_IPRANGE=m
IP_NF_MATCH_TOS=m
IP_NF_MATCH_RECENT=m
IP_NF_MATCH_ECN=m
IP_NF_MATCH_DSCP=m
IP_NF_MATCH_AH=m
IP_NF_MATCH_TTL=m
IP_NF_MATCH_OWNER=m
IP_NF_MATCH_ADDRTYPE=m
IP_NF_MATCH_HASHLIMIT=m
IP_NF_FILTER=m
IP_NF_TARGET_REJECT=m
IP_NF_TARGET_LOG=m
IP_NF_TARGET_ULOG=m
IP_NF_TARGET_TCPMSS=m
IP_NF_NAT=m
IP_NF_NAT_NEEDED=y
IP_NF_TARGET_MASQUERADE=m
IP_NF_TARGET_REDIRECT=m
IP_NF_TARGET_NETMAP=m
IP_NF_TARGET_SAME=m
IP_NF_NAT_SNMP_BASIC=m
IP_NF_NAT_IRC=m
IP_NF_NAT_FTP=m
IP_NF_NAT_H323=m
IP_NF_MANGLE=m
IP_NF_TARGET_TOS=m
IP_NF_TARGET_ECN=m
IP_NF_TARGET_DSCP=m
IP_NF_TARGET_TTL=m
IP_NF_RAW=m
IP_NF_ARPTABLES=m
IP_NF_ARPFILTER=m
IP_NF_ARP_MANGLE=m
NET_CLS_ROUTE=y
STANDALONE=y
PREVENT_FIRMWARE_BUILD=y
PARPORT=m
PARPORT_PC=m
BLK_DEV_FD=y
BLK_DEV_LOOP=m
BLK_DEV_RAM=y
BLK_DEV_RAM_COUNT=16
BLK_DEV_RAM_SIZE=4096
IDE=y
BLK_DEV_IDE=y
BLK_DEV_IDEDISK=y
IDEDISK_MULTI_MODE=y
BLK_DEV_IDECD=m
BLK_DEV_IDESCSI=m
IDE_GENERIC=y
BLK_DEV_IDEPCI=y
IDEPCI_SHARE_IRQ=y
BLK_DEV_GENERIC=y
BLK_DEV_IDEDMA_PCI=y
IDEDMA_PCI_AUTO=y
BLK_DEV_PIIX=y
BLK_DEV_IDEDMA=y
IDEDMA_AUTO=y
SCSI=y
SCSI_PROC_FS=y
BLK_DEV_SD=y
BLK_DEV_SR=m
BLK_DEV_SR_VENDOR=y
CHR_DEV_SG=m
SCSI_CONSTANTS=y
SCSI_LOGGING=y
SCSI_SATA=y
SCSI_ATA_PIIX=y
SCSI_SATA_INTEL_COMBINED=y
MD=y
BLK_DEV_MD=m
MD_LINEAR=m
MD_RAID0=m
MD_RAID1=m
MD_RAID10=m
MD_RAID5=m
MD_RAID6=m
MD_MULTIPATH=m
BLK_DEV_DM=m
DM_CRYPT=m
DM_SNAPSHOT=m
DM_MIRROR=m
DM_ZERO=m
NETDEVICES=y
DUMMY=m
TUN=m
NET_ETHERNET=y
MII=m
NET_PCI=y
E100=m
E1000=m
TIGON3=m
PPP=m
PPP_ASYNC=m
PPP_DEFLATE=m
PPP_BSDCOMP=m
INPUT=y
INPUT_MOUSEDEV=y
INPUT_MOUSEDEV_PSAUX=y
INPUT_MOUSEDEV_SCREEN_X=1024
INPUT_MOUSEDEV_SCREEN_Y=768
INPUT_KEYBOARD=y
KEYBOARD_ATKBD=y
INPUT_MOUSE=y
MOUSE_PS2=m
MOUSE_SERIAL=m
SERIO=y
SERIO_I8042=y
SERIO_PCIPS2=m
SERIO_LIBPS2=y
VT=y
VT_CONSOLE=y
HW_CONSOLE=y
SERIAL_8250=y
SERIAL_8250_CONSOLE=y
SERIAL_8250_PCI=y
SERIAL_8250_NR_UARTS=4
SERIAL_8250_RUNTIME_UARTS=4
SERIAL_CORE=y
SERIAL_CORE_CONSOLE=y
UNIX98_PTYS=y
LEGACY_PTYS=y
LEGACY_PTY_COUNT=256
PRINTER=m
RTC=y
HWMON=y
VGA_CONSOLE=y
DUMMY_CONSOLE=y
USB_ARCH_HAS_HCD=y
USB_ARCH_HAS_OHCI=y
USB_ARCH_HAS_EHCI=y
EDAC=y
EDAC_DEBUG=y
EDAC_MM_EDAC=y
EDAC_E7XXX=m
EDAC_E752X=y
EDAC_I82875P=m
EDAC_I82860=m
EDAC_POLL=y
EXT2_FS=y
FS_POSIX_ACL=y
XFS_FS=y
XFS_EXPORT=y
XFS_QUOTA=y
ROMFS_FS=m
INOTIFY=y
QUOTACTL=y
DNOTIFY=y
AUTOFS_FS=m
AUTOFS4_FS=m
FUSE_FS=m
ISO9660_FS=m
JOLIET=y
ZISOFS=y
ZISOFS_FS=m
UDF_FS=m
UDF_NLS=y
FAT_FS=m
MSDOS_FS=m
VFAT_FS=m
FAT_DEFAULT_CODEPAGE=437
FAT_DEFAULT_IOCHARSET="iso8859-1"
NTFS_FS=m
PROC_FS=y
PROC_KCORE=y
SYSFS=y
TMPFS=y
RAMFS=y
EFS_FS=m
HPFS_FS=m
UFS_FS=m
NFS_FS=m
NFS_V3=y
NFS_V4=y
NFSD=m
NFSD_V3=y
NFSD_V4=y
NFSD_TCP=y
LOCKD=m
LOCKD_V4=y
EXPORTFS=y
NFS_COMMON=y
SUNRPC=m
SUNRPC_GSS=m
RPCSEC_GSS_KRB5=m
SMB_FS=m
MSDOS_PARTITION=y
NLS=y
NLS_DEFAULT="iso8859-1"
NLS_CODEPAGE_437=m
NLS_CODEPAGE_850=y
NLS_ISO8859_1=y
NLS_UTF8=m
MAGIC_SYSRQ=y
DEBUG_KERNEL=y
LOG_BUF_SHIFT=16
DEBUG_PREEMPT=y
DEBUG_MUTEXES=y
DEBUG_BUGVERBOSE=y
DEBUG_FS=y
FRAME_POINTER=y
FORCED_INLINING=y
EARLY_PRINTK=y
STACK_BACKTRACE_COLS=2
DEBUG_RODATA=y
4KSTACKS=y
X86_FIND_SMP_CONFIG=y
X86_MPPARSE=y
DOUBLEFAULT=y
KDB=y
KDB_MODULES=y
KDB_CONTINUE_CATASTROPHIC=0
CRYPTO=y
CRYPTO_MD5=y
CRYPTO_DES=m
CRC_CCITT=m
CRC32=m
ZLIB_INFLATE=m
ZLIB_DEFLATE=m
TEXTSEARCH=y
TEXTSEARCH_KMP=m
TEXTSEARCH_BM=m
TEXTSEARCH_FSM=m
GENERIC_HARDIRQS=y
GENERIC_IRQ_PROBE=y
GENERIC_PENDING_IRQ=y
X86_SMP=y
X86_HT=y
X86_BIOS_REBOOT=y
X86_TRAMPOLINE=y
KTIME_SCALAR=y

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