Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Bug 1872903

Summary: remove pvmove restriction on naming writecache LV
Product: Red Hat Enterprise Linux 8 Reporter: David Teigland <teigland>
Component: lvm2Assignee: David Teigland <teigland>
lvm2 sub component: Cache Logical Volumes QA Contact: cluster-qe <cluster-qe>
Status: CLOSED ERRATA Docs Contact:
Severity: unspecified    
Priority: high CC: agk, cmarthal, heinzm, jbrassow, mcsontos, msnitzer, prajnoha, zkabelac
Version: 8.3Keywords: Reopened, Triaged
Target Milestone: rcFlags: pm-rhel: mirror+
Target Release: 8.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: lvm2-2.03.12-3.el8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-11-09 19:45:20 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description David Teigland 2020-08-26 21:09:02 UTC 
Description of problem:

pvmove gives an error if a writecache LV is named.  This check was likely a mistake because the functionality works and is allowed via different command options.

We want to avoid pvmoving the cachevol, but we can allow pvmoving the origin LV.  The origin LV can already be pvmoved by either naming the wcorig LV or by not naming any LV.  So, the writecache check is not actually restricting any functionality.

# lvs test -a -o+devices
  LV            VG   Attr       LSize   Pool        Origin        Data%  Devices       
  [fast_cvol]   test Cwi-aoC--- 256.00m                                  /dev/sdc(0)   
  main          test Cwi-aoC---   1.00g [fast_cvol] [main_wcorig] 3.66   main_wcorig(0)
  [main_wcorig] test owi-aoC---   1.00g                                  /dev/sdb(0)   

# pvmove -n main /dev/sdb
  pvmove not allowed on LV using writecache.

# pvmove -n main_wcorig /dev/sdb /dev/sdd
  /dev/sdb: Moved: 8.59%
  /dev/sdb: Moved: 62.50%
  /dev/sdb: Moved: 100.00%

# pvmove /dev/sdd /dev/sdb
  /dev/sdd: Moved: 0.78%
  /dev/sdd: Moved: 48.05%
  /dev/sdd: Moved: 100.00%

"pvmove -n main_wcorig /dev/sdb", which works, is the equivalent of "pvmove -n main /dev/sdb", which returns an error.


These checks against moving the writecache are correct:

# pvmove -n fast_cvol /dev/sdc
  Unable to pvmove device used for writecache.
# pvmove /dev/sdc
  Unable to pvmove device used for writecache.


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info:
Comment 1 David Teigland 2020-09-02 19:48:34 UTC 
pushed to master
https://sourceware.org/git/?p=lvm2.git;a=commit;h=d8bb85d9638e1b0cad96c654a1e4a61b6d33aa97
Comment 3 Corey Marthaler 2021-06-01 23:13:41 UTC 
Reopening...

I was auditing our tests to ensure that we do now test pvmoves for write cache volumes and found a bug when attempting just the named "main" volume. Also to be clear, the write cache pool (fast vol) continues to *not* be supported?

kernel-4.18.0-305.6.el8    BUILT: Thu May 13 14:06:29 CDT 2021
lvm2-2.03.12-2.el8    BUILT: Tue Jun  1 06:55:37 CDT 2021
lvm2-libs-2.03.12-2.el8    BUILT: Tue Jun  1 06:55:37 CDT 2021


[root@hayes-03 ~]# lvs -a -o +devices,segtype | grep cw
  cworigin            pv_shuffle_B Cwi-aoC--- 752.00m [cwpool_cvol] [cworigin_wcorig] 3.75      cworigin_wcorig(0)        writecache
  [cworigin_wcorig]   pv_shuffle_B owi-aoC--- 752.00m                                           /dev/sdl2(0)              linear    
  [cwpool_cvol]       pv_shuffle_B Cwi-aoC--- 500.00m                                           /dev/sdl2(3947)           linear    


# Scenario 1: (the named _wcorig volume)

[root@hayes-03 ~]# pvmove --atomic -n pv_shuffle_B/cworigin_wcorig -v /dev/sdd2 /dev/sdl2
  Archiving volume group "pv_shuffle_B" metadata (seqno 98).
  Creating logical volume pvmove0
  activation/volume_list configuration setting not defined: Checking only host tags for pv_shuffle_B/cworigin.
  Moving 188 extents of logical volume pv_shuffle_B/cworigin_wcorig.
  Creating logical volume pvmove0_mimage_0
  Creating logical volume pvmove0_mimage_1
  activation/volume_list configuration setting not defined: Checking only host tags for pv_shuffle_B/cworigin.
  Loading table for pv_shuffle_B-cwpool_cvol (253:76).
  Suppressed pv_shuffle_B-cwpool_cvol (253:76) identical table reload.
  Creating pv_shuffle_B-pvmove0_mimage_0
  Loading table for pv_shuffle_B-pvmove0_mimage_0 (253:80).
  Creating pv_shuffle_B-pvmove0_mimage_1
  Loading table for pv_shuffle_B-pvmove0_mimage_1 (253:81).
  Creating pv_shuffle_B-pvmove0
  Loading table for pv_shuffle_B-pvmove0 (253:82).
  Loading table for pv_shuffle_B-cworigin_wcorig (253:77).
  Loading table for pv_shuffle_B-cworigin (253:75).
  Suppressed pv_shuffle_B-cworigin (253:75) identical table reload.
  Suspending pv_shuffle_B-cworigin (253:75) with device flush
  Suspending pv_shuffle_B-cwpool_cvol (253:76) with device flush
  Suspending pv_shuffle_B-cworigin_wcorig (253:77) with device flush
  Loading table for pv_shuffle_B-cwpool_cvol (253:76).
  Suppressed pv_shuffle_B-cwpool_cvol (253:76) identical table reload.
  Loading table for pv_shuffle_B-cworigin (253:75).
  Suppressed pv_shuffle_B-cworigin (253:75) identical table reload.
  Resuming pv_shuffle_B-pvmove0_mimage_0 (253:80).
  Resuming pv_shuffle_B-pvmove0_mimage_1 (253:81).
  Resuming pv_shuffle_B-pvmove0 (253:82).
  Resuming pv_shuffle_B-cwpool_cvol (253:76).
  Resuming pv_shuffle_B-cworigin_wcorig (253:77).
  Resuming pv_shuffle_B-cworigin (253:75).
  Creating volume group backup "/etc/lvm/backup/pv_shuffle_B" (seqno 99).
  activation/volume_list configuration setting not defined: Checking only host tags for pv_shuffle_B/pvmove0.
  Checking progress before waiting every 15 seconds.
  /dev/sdd2: Moved: 4.26%
  /dev/sdd2: Moved: 100.00%
  Polling finished successfully.


# Scenario 2: (the named _cvol volume)
[root@hayes-03 ~]# pvmove --atomic -n pv_shuffle_B/cwpool_cvol -v /dev/sdl2 /dev/sdd2
  Archiving volume group "pv_shuffle_B" metadata (seqno 98).
  Creating logical volume pvmove0
  Unable to pvmove device used for writecache.


# Scenario 3: (the named top level main volume)
[root@hayes-03 ~]# pvmove -n pv_shuffle_B/cworigin -v /dev/sdl2 /dev/sdd2
  Archiving volume group "pv_shuffle_B" metadata (seqno 104).
  Creating logical volume pvmove0
  activation/volume_list configuration setting not defined: Checking only host tags for pv_shuffle_B/cworigin.
  activation/volume_list configuration setting not defined: Checking only host tags for pv_shuffle_B/cworigin.
  Moving 125 extents of logical volume pv_shuffle_B/cwpool_cvol.
  activation/volume_list configuration setting not defined: Checking only host tags for pv_shuffle_B/cworigin.
  Moving 188 extents of logical volume pv_shuffle_B/cworigin_wcorig.
  activation/volume_list configuration setting not defined: Checking only host tags for pv_shuffle_B/cworigin.
Segmentation fault (core dumped)
Comment 5 Corey Marthaler 2021-06-01 23:34:19 UTC 
Core was generated by `pvmove -n pv_shuffle_B/cworigin -v /dev/sdd2 /dev/sdl2'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000564bc76a3aad in lv_on_pmem (lv=0x564bc9ae2900) at metadata/metadata.c:4407
4407                            if (dev_is_pmem(lv->vg->cmd->dev_types, pv->dev)) {
Missing separate debuginfos, use: yum debuginfo-install pcre2-10.32-2.el8.x86_64
(gdb) bt
#0  0x0000564bc76a3aad in lv_on_pmem (lv=0x564bc9ae2900) at metadata/metadata.c:4407
#1  0x0000564bc763c142 in _writecache_add_target_line (dm=<optimized out>, mem=0x564bc9aab1f0, cmd=<optimized out>, target_state=<optimized out>, seg=0x564bc9ae6c98, laopts=<optimized out>, node=<optimized out>, len=<optimized out>, 
    pvmove_mirror_count=<optimized out>) at writecache/writecache.c:320
#2  0x0000564bc76dce2f in _add_target_to_dtree (dm=<optimized out>, dnode=<optimized out>, seg=<optimized out>, laopts=<optimized out>) at activate/dev_manager.c:250
#3  0x0000564bc76dfd63 in _add_segment_to_dtree (layer=0x0, laopts=0x7ffc5bee0860, seg=<optimized out>, dnode=0x564bc916d310, dtree=0x564bc916d130, dm=0x564bc9b0cb40) at activate/dev_manager.c:3217
#4  _add_new_lv_to_dtree (dm=dm@entry=0x564bc9b0cb40, dtree=dtree@entry=0x564bc916d130, lv=lv@entry=0x564bc9ae2660, laopts=laopts@entry=0x7ffc5bee0860, layer=0x0) at activate/dev_manager.c:3523
#5  0x0000564bc76e28f7 in _tree_action (dm=dm@entry=0x564bc9b0cb40, lv=lv@entry=0x564bc9ae2660, laopts=laopts@entry=0x7ffc5bee0860, action=action@entry=PRELOAD) at activate/dev_manager.c:3803
#6  0x0000564bc76e575a in dev_manager_preload (dm=dm@entry=0x564bc9b0cb40, lv=lv@entry=0x564bc9ae2660, laopts=laopts@entry=0x7ffc5bee0860, flush_required=flush_required@entry=0x7ffc5bee07fc) at activate/dev_manager.c:3867
#7  0x0000564bc7630391 in _lv_preload (lv=lv@entry=0x564bc9ae2660, laopts=laopts@entry=0x7ffc5bee0860, flush_required=flush_required@entry=0x7ffc5bee07fc) at activate/activate.c:1402
#8  0x0000564bc76350f0 in _lv_suspend (error_if_not_suspended=0, lvid_s=0x0, lv_pre=0x564bc9ae2660, lv=0x564bc9aee690, laopts=0x7ffc5bee0860, cmd=0x564bc901ea10) at activate/activate.c:2090
#9  lv_suspend_if_active (cmd=0x564bc901ea10, lvid_s=lvid_s@entry=0x0, origin_only=origin_only@entry=0, exclusive=exclusive@entry=0, lv=0x564bc9aee690, lv_pre=lv_pre@entry=0x564bc9ae2660) at activate/activate.c:2228
#10 0x0000564bc763667e in suspend_lv (cmd=<optimized out>, lv=lv@entry=0x564bc9ae2660) at activate/activate.c:2887
#11 0x0000564bc7681495 in _lv_update_and_reload (lv=0x564bc9ae2660, origin_only=<optimized out>, origin_only@entry=0) at metadata/lv_manip.c:7034
#12 0x0000564bc768ad4b in lv_update_and_reload (lv=<optimized out>) at metadata/lv_manip.c:7064
#13 0x0000564bc760c16e in _update_metadata (exclusive=<optimized out>, lvs_changed=<optimized out>, lv_mirr=0x564bc9aec018) at pvmove.c:562
#14 _pvmove_setup_single (cmd=cmd@entry=0x564bc901ea10, vg=vg@entry=0x564bc9ae0ac0, pv=pv@entry=0x564bc9ae0c80, handle=handle@entry=0x564bc9119128) at pvmove.c:724
#15 0x0000564bc76201c2 in _process_pvs_in_vg (process_all_devices=0, process_single_pv=0x564bc760bdb0 <_pvmove_setup_single>, handle=0x564bc9119128, error_flags=0, skip=0, process_all_pvs=0, arg_tags=0x7ffc5bee0b50, arg_devices=0x7ffc5bee0b70, 
    all_devices=0x7ffc5bee0b90, vg=0x564bc9ae0ac0, cmd=0x564bc901ea10) at toollib.c:4215
#16 _process_pvs_in_vgs (process_all_devices=0, process_single_pv=0x564bc760bdb0 <_pvmove_setup_single>, handle=0x564bc9119128, process_all_pvs=0, arg_tags=0x7ffc5bee0b50, arg_devices=0x7ffc5bee0b70, all_devices=0x7ffc5bee0b90, 
    all_vgnameids=0x7ffc5bee0b80, read_flags=1310720, cmd=0x564bc901ea10) at toollib.c:4337
#17 process_each_pv (cmd=cmd@entry=0x564bc901ea10, argc=argc@entry=1, argv=argv@entry=0x7ffc5bee1020, only_this_vgname=only_this_vgname@entry=0x0, all_is_set=all_is_set@entry=0, read_flags=1310720, read_flags@entry=1048576, handle=<optimized out>, 
    process_single_pv=<optimized out>) at toollib.c:4470
#18 0x0000564bc760d6dd in pvmove (cmd=0x564bc901ea10, argc=<optimized out>, argv=0x7ffc5bee13e0) at pvmove.c:898
#19 0x0000564bc75fd628 in lvm_run_command (cmd=cmd@entry=0x564bc901ea10, argc=<optimized out>, argc@entry=6, argv=<optimized out>, argv@entry=0x7ffc5bee13b8) at lvmcmdline.c:3239
#20 0x0000564bc75fe704 in lvm2_main (argc=6, argv=0x7ffc5bee13b8) at lvmcmdline.c:3771
#21 0x00007fdc30cf5493 in __libc_start_main (main=0x564bc75d7980 <main>, argc=6, argv=0x7ffc5bee13b8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc5bee13a8) at ../csu/libc-start.c:314
#22 0x0000564bc75d7a4e in _start () at lvm.c:22
Comment 6 David Teigland 2021-06-02 16:21:46 UTC 
This was caused by the unusual setup in which the writecache cachevol exists on the same underlying device as the main LV.  Fixed in:
https://sourceware.org/git/?p=lvm2.git;a=commit;h=247f69f9aafe731ef85268da1e6ce817295b265d
https://sourceware.org/git/?p=lvm2.git;a=commit;h=e7f107c24666c8577f30e530b74f1ce0347e459b

# lvs -a test -o+devices
  LV            VG   Attr       LSize   Pool        Origin        Data%  Devices       
  [fast_cvol]   test Cwi-aoC--- 128.00m                                  /dev/sde(64)  
  main          test Cwi-a-C--- 256.00m [fast_cvol] [main_wcorig] 0.00   main_wcorig(0)
  [main_wcorig] test owi-aoC--- 256.00m                                  /dev/sde(0)   

# pvmove -n test/main /dev/sde /dev/sdd
  Unable to move device used for writecache cachevol test/fast_cvol.

> Also to be clear, the write cache pool (fast vol) continues to *not* be supported?

Right, we don't want to move the cachevol LV, it should remain on the same underlying fast device, while we allow moving the origin LV between slow devices.  If someone wants to use a different fast device for their cache, they can remove the cache and add a new cache from the new device.
Comment 7 Corey Marthaler 2021-06-03 22:48:41 UTC 
Actually, this doesn't require the cachevol to exist on the same underlying device as the main LV, just that that is the device called to move along with the main LV.

# different devices
[root@hayes-01 ~]# lvs -a -o +devices
  LV                   VG                Attr       LSize Pool        Origin               Data%  Meta%  Move Log Cpy%Sync Convert Devices              
  [POOL_cvol]          writecache_sanity Cwi-aoC--- 2.00g                                                                          /dev/sdc1(0)         
  main_pvmove          writecache_sanity Cwi-a-C--- 4.00g [POOL_cvol] [main_pvmove_wcorig] 0.00                                    main_pvmove_wcorig(0)
  [main_pvmove_wcorig] writecache_sanity owi-aoC--- 4.00g                                                                          /dev/sdd1(0) 
        
# use wrong device here when naming the main origin
[root@hayes-01 ~]# pvmove -n writecache_sanity/main_pvmove -v /dev/sdc1 /dev/sdb1
  Archiving volume group "writecache_sanity" metadata (seqno 196).
  Creating logical volume pvmove0
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  Moving 512 extents of logical volume writecache_sanity/POOL_cvol.
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
Segmentation fault (core dumped)

# use correct device
[root@hayes-01 ~]# pvmove -n writecache_sanity/main_pvmove -v /dev/sdd1 /dev/sdb1
  Archiving volume group "writecache_sanity" metadata (seqno 196).
  Creating logical volume pvmove0
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  Moving 1024 extents of logical volume writecache_sanity/main_pvmove_wcorig.
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  Loading table for writecache_sanity-POOL_cvol (253:1).
  Suppressed writecache_sanity-POOL_cvol (253:1) identical table reload.
  Creating writecache_sanity-pvmove0
  Loading table for writecache_sanity-pvmove0 (253:3).
  Loading table for writecache_sanity-main_pvmove_wcorig (253:2).
  Loading table for writecache_sanity-main_pvmove (253:0).
  Suppressed writecache_sanity-main_pvmove (253:0) identical table reload.
  Suspending writecache_sanity-main_pvmove (253:0) with device flush
  Suspending writecache_sanity-POOL_cvol (253:1) with device flush
  Suspending writecache_sanity-main_pvmove_wcorig (253:2) with device flush
  Loading table for writecache_sanity-POOL_cvol (253:1).
  Suppressed writecache_sanity-POOL_cvol (253:1) identical table reload.
  Loading table for writecache_sanity-main_pvmove (253:0).
  Suppressed writecache_sanity-main_pvmove (253:0) identical table reload.
  Resuming writecache_sanity-pvmove0 (253:3).
  Resuming writecache_sanity-POOL_cvol (253:1).
  Resuming writecache_sanity-main_pvmove_wcorig (253:2).
  Resuming writecache_sanity-main_pvmove (253:0).
  Creating volume group backup "/etc/lvm/backup/writecache_sanity" (seqno 197).
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/pvmove0.
  Checking progress before waiting every 15 seconds.
  /dev/sdd1: Moved: 4.30%
  /dev/sdd1: Moved: 35.16%
  /dev/sdd1: Moved: 66.02%
  /dev/sdd1: Moved: 96.97%
  /dev/sdd1: Moved: 100.00%
  Polling finished successfully.
Comment 8 Corey Marthaler 2021-06-15 21:31:40 UTC 
Marking Verified:Tested in the latest rpms.

kernel-4.18.0-310.el8    BUILT: Thu May 27 14:24:00 CDT 2021
lvm2-2.03.12-3.el8    BUILT: Tue Jun 15 11:37:17 CDT 2021
lvm2-libs-2.03.12-3.el8    BUILT: Tue Jun 15 11:37:17 CDT 2021


SCENARIO - [pvmove_main_origin_but_call_fast_pool_device]
Create an origin volume and attempt to pvmove by calling the fast pool device (Bug 1187290)

*** Writecache info for this scenario ***
*  origin (slow):  /dev/sde1
*  pool (fast):    /dev/sdh1 /dev/sdd1
************************************

Adding "slow" and "fast" tags to corresponding pvs


Create origin (slow) volume
lvcreate --yes --wipesignatures y  -L 4G -n main_pvmove writecache_sanity @slow

Create writecache cvol (fast) volume using the same slow device
lvcreate --yes  -L 2G -n POOL writecache_sanity /dev/sdh1

Deactivate *ONLY* fast pool before conversion to write cache (SEE bug 1185347)
Create writecached volume by combining the cache pool (fast) and origin (slow) volumes
lvconvert --yes --type writecache --cachevol writecache_sanity/POOL writecache_sanity/main_pvmove

Attempt to pvmove main origin volume but specify the fast POOL volume (/dev/sdh1)
pvmove -n writecache_sanity/main_pvmove -v /dev/sdh1 /dev/sdb1
  Archiving volume group "writecache_sanity" metadata (seqno 106).
  Creating logical volume pvmove0
  Unable to move device used for writecache cachevol writecache_sanity/POOL_cvol.

Pvmove main origin volume but specify the fast POOL volume (/dev/sdh1) as the device to move to
pvmove -n writecache_sanity/main_pvmove -v /dev/sde1 /dev/sdh1
  Archiving volume group "writecache_sanity" metadata (seqno 106).
  Creating logical volume pvmove0
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  Moving 1024 extents of logical volume writecache_sanity/main_pvmove_wcorig.
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/main_pvmove.
  Loading table for writecache_sanity-POOL_cvol (253:1).
  Suppressed writecache_sanity-POOL_cvol (253:1) identical table reload.
  Creating writecache_sanity-pvmove0
  Loading table for writecache_sanity-pvmove0 (253:3).
  Loading table for writecache_sanity-main_pvmove_wcorig (253:2).
  Loading table for writecache_sanity-main_pvmove (253:0).
  Suppressed writecache_sanity-main_pvmove (253:0) identical table reload.
  Suspending writecache_sanity-main_pvmove (253:0) with device flush
  Suspending writecache_sanity-POOL_cvol (253:1) with device flush
  Suspending writecache_sanity-main_pvmove_wcorig (253:2) with device flush
  Loading table for writecache_sanity-POOL_cvol (253:1).
  Suppressed writecache_sanity-POOL_cvol (253:1) identical table reload.
  Loading table for writecache_sanity-main_pvmove (253:0).
  Suppressed writecache_sanity-main_pvmove (253:0) identical table reload.
  Resuming writecache_sanity-pvmove0 (253:3).
  Resuming writecache_sanity-POOL_cvol (253:1).
  Resuming writecache_sanity-main_pvmove_wcorig (253:2).
  Resuming writecache_sanity-main_pvmove (253:0).
  Creating volume group backup "/etc/lvm/backup/writecache_sanity" (seqno 107).
  activation/volume_list configuration setting not defined: Checking only host tags for writecache_sanity/pvmove0.
  Checking progress before waiting every 15 seconds.
  Polling finished successfully.

Separating cache pool (lvconvert --yes --splitcache writecache_sanity/main_pvmove) from cache origin
Removing cache pool writecache_sanity/POOL
Removing cache origin volume writecache_sanity/main_pvmove
lvremove -f /dev/writecache_sanity/main_pvmove
Comment 11 Corey Marthaler 2021-06-24 02:25:34 UTC 
Marking verified in the latest rpms as well.

kernel-4.18.0-314.el8    BUILT: Tue Jun 15 11:04:32 CDT 2021
lvm2-2.03.12-4.el8    BUILT: Tue Jun 22 03:35:27 CDT 2021
lvm2-libs-2.03.12-4.el8    BUILT: Tue Jun 22 03:35:27 CDT 2021


[root@hayes-03 ~]# lvs -a -o +devices
  LV                   VG                Attr       LSize Pool        Origin               Data%  Meta%  Move Log Cpy%Sync Convert Devices              
  [POOL_cvol]          writecache_sanity Cwi-aoC--- 2.00g                                                                          /dev/sdm1(0)         
  main_pvmove          writecache_sanity Cwi-a-C--- 4.00g [POOL_cvol] [main_pvmove_wcorig] 0.00                                    main_pvmove_wcorig(0)
  [main_pvmove_wcorig] writecache_sanity owi-aoC--- 4.00g                                                                          /dev/sdn1(0)         
[root@hayes-03 ~]# pvmove -n writecache_sanity/main_pvmove -v /dev/sdm1 /dev/sdc1
  Archiving volume group "writecache_sanity" metadata (seqno 48).
  Creating logical volume pvmove0
  Unable to move device used for writecache cachevol writecache_sanity/POOL_cvol.
Comment 14 errata-xmlrpc 2021-11-09 19:45:20 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (lvm2 bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:4431