*  Works with kernel-5.14.0-516.el9 and kmod-kvdo-8.2.4.15-142.el9

kmod-kvdo-8.2.4.15-142.el9    BUILT: Mon Oct  7 09:33:22 PM CEST 2024
kernel-5.14.0-516.el9    BUILT: Tue Oct  8 04:14:48 PM CEST 2024
lvm2-2.03.27-1.el9    BUILT: Wed Oct  9 12:38:05 PM CEST 2024
lvm2-libs-2.03.27-1.el9    BUILT: Wed Oct  9 12:38:05 PM CEST 2024
 
[root@virt-511 ~]# lvcreate --yes --type vdo -n resize_lv  -L 34G resize_matrix -V100G  
    The VDO volume can address 30 GB in 15 data slabs, each 2 GB.
    It can grow to address at most 16 TB of physical storage in 8192 slabs.
    If a larger maximum size might be needed, use bigger slabs.
  Logical volume "resize_lv" created.
[root@virt-511 ~]# lvchange --yes -ay  resize_matrix/resize_lv
[root@virt-511 ~]# lvreduce --yes -L -441M resize_matrix/resize_lv
  Rounding size to boundary between physical extents: 440.00 MiB.
  No file system found on /dev/resize_matrix/resize_lv.
  WARNING: /dev/resize_matrix/resize_lv: Discarding 440.00 MiB at offset 106912808960, please wait...
  Size of logical volume resize_matrix/resize_lv changed from 100.00 GiB (25600 extents) to 99.57 GiB (25490 extents).
  Logical volume resize_matrix/resize_lv successfully resized.


*  Fails with kernel-5.14.0-522.el9 and kmod-kvdo-8.2.4.15-144.el9

kmod-kvdo-8.2.4.15-144.el9    BUILT: Mon Oct 21 09:24:54 AM EST 2024
kernel-5.14.0-522.el9    BUILT: Sun Oct 20 08:53:48 AM EST 2024
lvm2-2.03.27-1.el9    BUILT: Wed Oct  9 05:38:05 AM EST 2024
lvm2-libs-2.03.27-1.el9    BUILT: Wed Oct  9 05:38:05 AM EST 2024
 
lvcreate --yes --type vdo -n resize_lv  -L 34G resize_matrix -V100G  
The VDO volume can address 30 GB in 15 data slabs, each 2 GB.
    It can grow to address at most 16 TB of physical storage in 8192 slabs.
    If a larger maximum size might be needed, use bigger slabs.
  Logical volume "resize_lv" created.
 
activating LV resize_lv -ay on megatest-04.lab.eng.rdu2.redhat.com
lvchange --yes -ay  resize_matrix/resize_lv
Removing space from resize_matrix/resize_lv on megatest-04.lab.eng.rdu2.redhat.com
lvreduce --yes -L -441M resize_matrix/resize_lv 
 
[root@megatest-04 ~]# lvreduce --yes -L -441M resize_matrix/resize_lv 
  Rounding size to boundary between physical extents: 440.00 MiB.
  No file system found on /dev/resize_matrix/resize_lv.
  /dev/resize_matrix/resize_lv: max bytes and granularity query fails.
 
 
10:58:57.861900 lvreduce[101108] metadata/vg.c:59  Allocated VG resize_matrix at 0x55cdecec04b0.
10:58:57.861913 lvreduce[101108] format_text/import_vsn1.c:632  Importing logical volume resize_matrix/vpool0.
10:58:57.861919 lvreduce[101108] format_text/import_vsn1.c:632  Importing logical volume resize_matrix/resize_lv.
10:58:57.861923 lvreduce[101108] format_text/import_vsn1.c:632  Importing logical volume resize_matrix/vpool0_vdata.
10:58:57.861933 lvreduce[101108] metadata/lv_manip.c:1305  Stack resize_matrix/vpool0:0[0] on LV resize_matrix/vpool0_vdata:0.
10:58:57.861938 lvreduce[101108] metadata/lv_manip.c:870  Adding resize_matrix/vpool0:0 as an user of resize_matrix/vpool0_vdata.
10:58:57.861943 lvreduce[101108] metadata/lv_manip.c:1305  Stack resize_matrix/resize_lv:0[0] on LV resize_matrix/vpool0:0.
10:58:57.861948 lvreduce[101108] metadata/lv_manip.c:870  Adding resize_matrix/resize_lv:0 as an user of resize_matrix/vpool0.
10:58:57.861959 lvreduce[101108] toollib.c:3522  Adding resize_matrix/resize_lv to the list of LVs to be processed.
10:58:57.861965 lvreduce[101108] toollib.c:3597  Processing LV resize_lv in VG resize_matrix.
10:58:57.861979 lvreduce[101108] activate/dev_manager.c:972  Getting device info for resize_matrix-resize_lv [LVM-VELuH2m5xjvQH1Uy1RFrBuHNpb4Hxa3KiKAaRMVtkZ83HJFPiJlExqvTKxxxXl5I].
10:58:57.861987 lvreduce[101108] device_mapper/ioctl/libdm-iface.c:2065  dm info  LVM-VELuH2m5xjvQH1Uy1RFrBuHNpb4Hxa3KiKAaRMVtkZ83HJFPiJlExqvTKxxxXl5I [ noopencount flush ]   [2048] (*1)
10:58:57.862010 lvreduce[101108] activate/dev_manager.c:972  Getting device info for resize_matrix-resize_lv [LVM-VELuH2m5xjvQH1Uy1RFrBuHNpb4Hxa3KiKAaRMVtkZ83HJFPiJlExqvTKxxxXl5I].
10:58:57.862015 lvreduce[101108] device_mapper/ioctl/libdm-iface.c:2065  dm info  LVM-VELuH2m5xjvQH1Uy1RFrBuHNpb4Hxa3KiKAaRMVtkZ83HJFPiJlExqvTKxxxXl5I [ noopencount flush ]   [2048] (*1)
10:58:57.862027 lvreduce[101108] metadata/lv_manip.c:5233  Rounding size to boundary between physical extents: 440.00 MiB.
10:58:57.862033 lvreduce[101108] metadata/lv_manip.c:5738  New size for resize_matrix/resize_lv: 25490. Existing logical extents: 25600 / physical extents: 8704.
10:58:57.862042 lvreduce[101108] activate/dev_manager.c:972  Getting device info for resize_matrix-resize_lv [LVM-VELuH2m5xjvQH1Uy1RFrBuHNpb4Hxa3KiKAaRMVtkZ83HJFPiJlExqvTKxxxXl5I].
10:58:57.862047 lvreduce[101108] device_mapper/ioctl/libdm-iface.c:2065  dm info  LVM-VELuH2m5xjvQH1Uy1RFrBuHNpb4Hxa3KiKAaRMVtkZ83HJFPiJlExqvTKxxxXl5I [ noopencount flush ]   [2048] (*1)
10:58:57.864879 lvreduce[101108] device/dev-type.c:972  No file system found on /dev/resize_matrix/resize_lv.
10:58:57.865106 lvreduce[101108] metadata/lv_manip.c:6425  <backtrace>
10:58:57.865148 lvreduce[101108] device/dev-type.c:1366  Device /dev/resize_matrix/resize_lv: queue/discard_max_bytes is 0 bytes.
10:58:57.865154 lvreduce[101108] metadata/lv_manip.c:5768  /dev/resize_matrix/resize_lv: max bytes and granularity query fails.
10:58:57.865159 lvreduce[101108] metadata/lv_manip.c:7061  <backtrace>
10:58:57.865163 lvreduce[101108] toollib.c:3603  <backtrace>
10:58:57.865169 lvreduce[101108] toollib.c:4090  <backtrace>
10:58:57.865174 lvreduce[101108] mm/memlock.c:615  Unlock: Memlock counters: prioritized:0 locked:0 critical:0 daemon:0 suspended:0
10:58:57.865191 lvreduce[101108] activate/fs.c:493  Syncing device names
10:58:57.865203 lvreduce[101108] misc/lvm-flock.c:84  Unlocking /run/lock/lvm/V_resize_matrix
10:58:57.865210 lvreduce[101108] misc/lvm-flock.c:47  _undo_flock /run/lock/lvm/V_resize_matrix
10:58:57.865231 lvreduce[101108] metadata/vg.c:74  Freeing VG resize_matrix at 0x55cdecec04b0.
10:58:57.865237 lvreduce[101108] metadata/vg.c:74  Freeing VG resize_matrix at 0x55cdeceba490.
10:58:57.865244 lvreduce[101108] device_mapper/libdm-config.c:1083  global/notify_dbus not found in config: defaulting to 1
10:58:57.865251 lvreduce[101108] cache/lvmcache.c:2592  Destroy lvmcache content
10:58:57.889783 lvreduce[101108] lvmcmdline.c:3308  Completed: lvreduce -vvvv --yes -L -441M resize_matrix/resize_lv
10:58:57.889808 lvreduce[101108] cache/lvmcache.c:2592  Destroy lvmcache content
10:58:57.889822 lvreduce[101108] metadata/vg.c:74  Freeing VG #orphans_lvm2 at 0x55cdecd9d320.
10:58:57.889874 lvreduce[101108] activate/fs.c:493  Syncing device names