kcephfs: umount -f can fail after mds reconnect failure
We've seen this several times on the lab cluster and teuthology:
- fail to reconnect to mds for some reason
f mount doesn't go away..
#1 Updated by Zheng Yan over 4 years ago
#2 Updated by Zheng Yan over 4 years ago
find a bug that may cause forced umount hang
In my test, cleanup dirty data/metadata and mds requests work well. But it still can't cleanup pages under writeback. 'umount -f' hangs if there are hang OSD requests,