Hello. Linux 5.10.67, glibc 2.34, lvm 2.03.13, udevd 246, simple init script run on shutdown which does vgchange -a n --sysinit no other processes are running (just init, my script and vgchange), vgstorage is vg on md raid 10 on 4 hdd disks. it hangs with + /sbin/vgchange -a n --sysinit --verbose --debug Failed to find sysfs mount point No proc filesystem found: skipping sysfs filter No proc filesystem found: skipping multipath filter File locking initialisation failed. Deactivating logical volume vgstorage/lvhome. Removing vgstorage-lvhome (253:0) Deactivated 1 logical volumes in volume group vgstorage. Note that running vgchange -a n --sysinit --verbose --debug on fully running system just works fine: # vgchange -a n --sysinit --verbose --debug Deactivating logical volume vgstorage/lvhome. Removing vgstorage-lvhome (253:0) Deactivated 1 logical volumes in volume group vgstorage. 0 logical volume(s) in volume group "vgstorage" now active # so I've restarted udevd just before vgchange call in my script and it works. Other test: fully running system # udevd --version 246 # killall udevd # vgchange -a n --sysinit --verbose --debug Deactivating logical volume vgstorage/lvhome. Removing vgstorage-lvhome (253:0) Deactivated 1 logical volumes in volume group vgstorage. and hangs Why is udevd needed for vgchange there? It wasn't needed to deactivate vg before AFAIK. strace > ioctl(3, DM_DEV_STATUS, {version=[4, 0, 0], data_size=2048, uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC-real", flags=DM_EXISTS_FLAG} => {version=[4, 43, 0], data_size=2048, uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC-real", flags=DM_EXISTS_FLAG}) = -1 ENXIO (No such device or address) > ioctl(3, DM_DEV_STATUS, {version=[4, 0, 0], data_size=2048, uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC-cow", flags=DM_EXISTS_FLAG} => {version=[4, 43, 0], data_size=2048, uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC-cow", flags=DM_EXISTS_FLAG}) = -1 ENXIO (No such device or address) > ioctl(3, DM_DEV_STATUS, {version=[4, 0, 0], data_size=2048, dev=makedev(0xfd, 0), flags=DM_EXISTS_FLAG|DM_PERSISTENT_DEV_FLAG} => {version=[4, 43, 0], data_size=305, dev=makedev(0xfd, 0), name="vgstorage-lvhome", uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC", target_count=1, open_count=0, event_nr=0, flags=DM_EXISTS_FLAG|DM_PERSISTENT_DEV_FLAG|DM_ACTIVE_PRESENT_FLAG}) = 0 > write(2, " ", 2 ) = 2 > write(2, "Removing vgstorage-lvhome (253:0)", 33Removing vgstorage-lvhome (253:0)) = 33 > write(2, "\n", 1 > ) = 1 > openat(AT_FDCWD, "/dev/urandom", O_RDONLY) = 4 > read(4, "M\277", 2) = 2 > semget(0xd4dbf4d, 1, IPC_CREAT|IPC_EXCL|0600) = 1 > semctl(1, 0, SETVAL, 0x1) = 0 > semctl(1, 0, GETVAL, NULL) = 1 > close(4) = 0 > semtimedop(1, [{sem_num=0, sem_op=1, sem_flg=0}], 1, NULL) = 0 > semctl(1, 0, GETVAL, NULL) = 2 > ioctl(3, DM_DEV_REMOVE, {version=[4, 0, 0], data_size=2048, dev=makedev(0xfd, 0), event_nr=6340429, flags=DM_EXISTS_FLAG|DM_PERSISTENT_DEV_FLAG|DM_SKIP_BDGET_FLAG} => {version=[4, 43, 0], data_size=305, dev=makedev(0xfd, 0), name="vgstorage-lvhome", uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC", flags=DM_EXISTS_FLAG|DM_PERSISTENT_DEV_FLAG|DM_SKIP_BDGET_FLAG|DM_UEVENT_GENERATED_FLAG}) = 0 > brk(0x55a3f9c90000) = 0x55a3f9c90000 > brk(0x55a3f9c88000) = 0x55a3f9c88000 > ioctl(3, DM_DEV_STATUS, {version=[4, 0, 0], data_size=2048, uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC", flags=DM_EXISTS_FLAG|DM_SKIP_BDGET_FLAG} => {version=[4, 43, 0], data_size=2048, uuid="LVM-RHsosDyNlYziYbg37wzJcScURBWTgIsLKKLTWRdexUv1xoTudaMvkeXcNyg5JQiC", flags=DM_EXISTS_FLAG|DM_SKIP_BDGET_FLAG}) = -1 ENXIO (No such device or address) > rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 > rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f00fed2b480}, NULL, 8) = 0 > rt_sigaction(SIGTERM, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f00fed2b480}, NULL, 8) = 0 > write(2, " ", 2 ) = 2 > write(2, "Deactivated 1 logical volumes in volume group vgstorage.", 56Deactivated 1 logical volumes in volume group vgstorage.) = 56 > write(2, "\n", 1 > ) = 1 > setpriority(PRIO_PROCESS, 0, 0) = 0 > semget(0xd4dbf4d, 1, 000) = 1 > semctl(1, 0, GETVAL, NULL) = 2 > semtimedop(1, [{sem_num=0, sem_op=-1, sem_flg=IPC_NOWAIT}], 1, NULL) = 0 > semtimedop(1, [{sem_num=0, sem_op=0, sem_flg=0}], 1, NULL -- Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org ) _______________________________________________ linux-lvm mailing list linux-lvm@xxxxxxxxxx https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/