[LU-7383] migrate failed: Device or resource busy (-16) after "ls" dir

Related — Fri, 2 Feb 2018 09:17:35 +0000

according to the migrate dir test plan, here is what I do:

1. Setup lustre with 4 MDTs, 4 OSTs and 1 client.
2. Create 5 directories /mnt/lustre/migrate{1..5} and 100 files under each directory on MDT0
3. Create another directory /mnt/lustre/other_dir also on MDT0, then create some symbol_link/link files, which should be linked to files under /mnt/lustre/migrate{1..5}
4. ls /mnt/lustre/other_dir
5. Migrate /mnt/lustre/migrate2 by
lfs migrate -m 1 /mnt/lustre/migrate2

Got following failure:

[root@onyx-27 lustre]# lfs migrate -m 1 /mnt/lustre/migrate2
/mnt/lustre/migrate2/1 migrate failed: Device or resource busy (-16)
error: migrate: migrate file '/mnt/lustre/migrate2' failed

After talked with Di, he said there are two ways to bypass this problem:
either: touch another file under other_dir

[root@onyx-27 lustre]# touch other_dir/a
[root@onyx-27 lustre]# lfs migrate -m 1 /mnt/lustre/migrate2
[root@onyx-27 lustre]#

or umount and mount the client

Whamcloud Community JIRA

[LU-7383] migrate failed: Device or resource busy (-16) after "ls" dir