Issue
What were you trying to do that didn't work?
Please provide the package NVR for which bug is seen:
kernel-5.14.0-427.el9.x86_64
mdadm-4.2-10.el9.x86_64
How reproducible:
Actually running:
https://gitlab.cee.redhat.com/kernel-qe/kernel/-/blob/master/storage/mdadm/20230831-new/05-raid5/0512-raid5_takeover_5_to_1.sh?ref_type=heads
Steps to reproduce
Create a RAID 5 with 3 2GB loop devices first .
mdadm -CR /dev/md0 -l 5 -n 3 /dev/loop1 /dev/loop2 /dev/loop3
mkfs.ext4 mount to the mount point
mkdir -p /mnt/md_test
mkfs.ext4 /dev/md0
mount /dev/md0 /mnt/md_test
Takeover RAID 5 to RAID 1
mdadm --grow /dev/md0 --array-size 2094080
mdadm --grow -n 2 /dev/md0 --backup=internal
mdadm --grow /dev/md0 -l1
Trying to umount or stop the /dev/md0 device
umount /dev/md0
mdadm --stop /dev/md0
Expected results
umount successfully ,and stop the mdadm device successfully.
Actual results
When umount , it hanging there. I have to close my terminal then re-ssh to the host .checkout the mount status with lsblk , the mount point doesn't mount yet. but when I trying to mdadm --stop /dev/md0 got below error.
"""
mdadm: Cannot get exclusive access to /dev/md0:Perhaps a running process, mounted filesystem or active volume group?
"""
// After first umount command hanging there, re-ssh to the host.
[root@amd-genoa-03 05-raid5]# lsblk
NAME
MAJ:MIN RM
SIZE RO TYPE MOUNTPOINTS
loop1
7:1
0
2G 0 loop
└─md0
9:0
0
2G 0 raid1
loop2
7:2
0
2G 0 loop
└─md0
9:0
0
2G 0 raid1
loop3
7:3
0
2G 0 loop
└─md0
9:0
0
2G 0 raid1
nvme0n1
259:0
0 465.8G 0 disk
├─nvme0n1p1
259:1
0
600M 0 part /boot/efi
├─nvme0n1p2
259:2
0
1G 0 part /boot
└─nvme0n1p3
259:3
0 464.2G 0 part
├─rhel_amd--genoa--03-root 253:0
0
70G 0 lvm
/
├─rhel_amd--genoa--03-swap 253:1
0
4G 0 lvm
[SWAP]
└─rhel_amd--genoa--03-home 253:2
0 390.2G 0 lvm
/home
[root@amd-genoa-03 05-raid5]# umount /dev/md0
umount: /dev/md0: not mounted.
[root@amd-genoa-03 05-raid5]# mdadm --stop /dev/md0
mdadm: Cannot get exclusive access to /dev/md0:Perhaps a running process, mounted filesystem or active volume group?
[root@amd-genoa-03 05-raid5]#
