When I am trying to create LV using lvcreate on RHEL 6.2, it hung at semaphore operation



#mm/memlock.c:297 Unlocked 14708736 bytes
#activate/fs.c:486 Syncing device names
#libdm-common.c:1294 Udev cookie 0xd4d27a5 (semid 1671174) decremented
to 0
#libdm-common.c:1550 Udev cookie 0xd4d27a5 (semid 1671174) waiting for
zero
<--no output--> Hang at this point

below is the strace log

Command strace lvcreate --size 16326656K --permission rw --name lv_root vg_cfttstvm52 /dev/sda2

execve("/sbin/lvcreate", ["lvcreate", "--size", "16326656K", "--permission", "rw", "--name", "lv_root", "vg_cfttstvm52", "/dev/sda2"], [/* 92 vars */]) = 0
....
....
open("/etc/udev/udev.conf", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/dev/.udev/queue.bin", O_RDONLY) = 7
fstat(7, {st_mode=S_IFREG|0644, st_size=846, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe5981ed000
read(7, "[\3\0\0\0\0\0\0\\\3\0\0\0\0\0\0Q\0/devices/pci00"..., 4096) = 846
close(7) = 0
munmap(0x7fe5981ed000, 4096) = 0
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
stat("/dev/sda2", {st_mode=S_IFBLK|0660, st_rdev=makedev(8, 2), ...}) = 0
stat("/dev/sda2", {st_mode=S_IFBLK|0660, st_rdev=makedev(8, 2), ...}) = 0
ioctl(3, DM_DEV_CREATE, 0x1feeee0) = 0
ioctl(3, DM_TABLE_STATUS, 0x1feeee0) = 0
ioctl(3, DM_TABLE_LOAD, 0x1feeee0) = 0
open("/dev/urandom", O_RDONLY) = 7
read(7, "9\310", 2) = 2
semget(0xd4dc839, 1, IPC_CREAT|IPC_EXCL|0600) = 32769
semctl(32769, 0, SETVAL, 0x1) = 0
semctl(32769, 0, GETVAL, 0xffffffffffffffff) = 1
close(7) = 0
semop(32769, {{0, 1, 0}}, 1) = 0
semctl(32769, 0, GETVAL, 0xffffffffffffffff) = 2
ioctl(3, DM_DEV_SUSPEND, 0x1feeee0) = 0
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = 0
ioctl(3, DM_TABLE_DEPS, 0x1feeee0) = 0
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
ioctl(3, DM_DEV_STATUS, 0x1feeee0) = -1 ENXIO (No such device or address)
lseek(6, 0, SEEK_SET) = 0
read(6, "00400000-004c6000 r-xp 00000000 "..., 8192) = 4020
read(6, "7fffbb10f000-7fffbb110000 r-xp 0"..., 4172) = 164
read(6, "", 4008) = 0
munlock(0x400000, 811008) = 0
munlock(0x6c6000, 32768) = 0
munlock(0x6ce000, 28672) = 0
munlock(0x1fa4000, 10797056) = 0
munlock(0x7fe596d55000, 241664) = 0
munlock(0x7fe596f90000, 4096) = 0
munlock(0x7fe596f91000, 4096) = 0
munlock(0x7fe596f92000, 118784) = 0
munlock(0x7fe5971ae000, 4096) = 0
munlock(0x7fe5971af000, 4096) = 0
munlock(0x7fe5971b0000, 4096) = 0
munlock(0x7fe5971b1000, 1667072) = 0
munlock(0x7fe597548000, 16384) = 0
munlock(0x7fe59754c000, 4096) = 0
munlock(0x7fe59754d000, 20480) = 0
munlock(0x7fe597794000, 4096) = 0
munlock(0x7fe597795000, 159744) = 0
munlock(0x7fe5979bc000, 8192) = 0
munlock(0x7fe5979be000, 20480) = 0
munlock(0x7fe597bc2000, 4096) = 0
munlock(0x7fe597bc3000, 8192) = 0
munlock(0x7fe597dc5000, 4096) = 0
munlock(0x7fe597dc6000, 4096) = 0
munlock(0x7fe597dc7000, 57344) = 0
munlock(0x7fe597fd4000, 4096) = 0
munlock(0x7fe597fd5000, 4096) = 0
munlock(0x7fe597fd6000, 131072) = 0
munlock(0x7fe5981ee000, 28672) = 0
munlock(0x7fe5981f5000, 4096) = 0
munlock(0x7fe5981f6000, 4096) = 0
munlock(0x7fe5981f7000, 4096) = 0
munlock(0x7fffbb0b3000, 0) = 0
munlock(0x7fffbb0b3000, 290816) = 0
close(6) = 0
setpriority(PRIO_PROCESS, 0, 0) = 0
brk(0x1fff000) = 0x1fff000
semget(0xd4dc839, 1, 0) = 32769
semctl(32769, 0, GETVAL, 0xffffffffffffffff) = 2
semop(32769, {{0, -1, IPC_NOWAIT}}, 1) = 0
semop(32769, {{0, 0, 0}}, 1

Output from -

??

(Note the root shell prompt. Run as root.)

Here the output of ipcs... the lvcreate command was in hung state while collecting ipcs output

------ Shared Memory Segments --------
key shmid owner perms bytes nattch status

------ Semaphore Arrays --------
key semid owner perms nsems
0x00000000 0 root 600 1
0x0d4dff67 32769 root 600 1

------ Message Queues --------
key msqid owner perms used-bytes messages




ipcs -a -p


------ Shared Memory Creator/Last-op --------
shmid owner cpid lpid


------ Message Queues PIDs --------
msqid owner lspid lrpid

In my Case also lvcrate Hung at semaphore operation.

# strace lvcreate -L 5M --debug -n testlv testvg
............
............
............
............
munlock(0x10000000, 991232) = 0
munlock(0x10101000, 20480) = 0
munlock(0x10106000, 131072) = 0
munlock(0x10135000, 24576) = 0
munlock(0x1013b000, 10768384) = 0
munlock(0x2e4a0000, 143360) = 0
munlock(0x2e4df000, 4096) = 0
munlock(0x2e4e0000, 4096) = 0
munlock(0x2e53b000, 4096) = 0
munlock(0x2e540000, 61440) = 0
munlock(0x2e55e000, 4096) = 0
munlock(0x2e570000, 233472) = 0
munlock(0x2e5b8000, 12288) = 0
munlock(0x2e5bb000, 4096) = 0
munlock(0x2f8e0000, 1556480) = 0
munlock(0x2fa6c000, 16384) = 0
munlock(0x2fa70000, 12288) = 0
munlock(0x2fa73000, 12288) = 0
munlock(0x2fab0000, 102400) = 0
munlock(0x2fae0000, 4096) = 0
munlock(0x2fae1000, 8192) = 0
munlock(0x2faf0000, 32768) = 0
munlock(0x2fb0f000, 4096) = 0
munlock(0x2fb10000, 4096) = 0
munlock(0x77696000, 12288) = 0
munlock(0x776a0000, 4096) = 0
munlock(0x7f890000, 135168) = 0
close(6) = 0
setpriority(PRIO_PROCESS, 0, 0) = 0
brk(0x1018f000) = 0x1018f000
semget(0xd4dee5a, 1, 0) = 622611
semctl(622611, 0, IPC_64|GETVAL, 0) = 2
semop(0x98013, 0x7f8af4d0, 0x1) = 0
semop(0x98013, 0x7f8af510, 0x1


How to reslove this issue ?

For me:
# lvcreate --version
LVM version: 2.02.97(2) (2012-08-07)
Library version: 1.02.76 (2012-08-07)
Driver version: 4.24.0

I am using 3.10.28 kernel version .

Please re-read the LQ Rules...you re-opened a thread that has been closed for TWO YEARS, and hijacked it with your own question. Please open your OWN THREAD for your own question. And the OP of this thread was asked for information...which you did not provide.

Also, you don't say what version/distro of Linux you're using...but if you're using Red Hat Enterprise, you need to CALL RED HAT SUPPORT, since you're paying for it. There are reported bugs of this very type related to RHEL 6.x on Red Hat's customer portal (which you should have access to, with your subscription), and there are suggested bugfixes and workarounds.

Please add output of:
pvscan
pvs
vgs
lvs