[Ocfs2-devel] report BUG: io_uring triggers umount error

[Heming Zhao]

Hello List,

I found a weird bug on ocfs2. I am busying with other jobs, if anyone have time
he/she could fix it. This bug is blocking fstest generic/013 test case, and also
blocking fstest to do later test cases.

How to trigger:
```
git clone git://git.kernel.dk/liburing.git
cd liburing
make
cd examples
mount -t ocfs2 /dev/sda /mnt
cp /etc/hosts /mnt/a
./link-cp /mnt/a /mnt/b
umount /mnt
```

umount trigger error message:
```
# umount /mnt 
umount: /mnt: target is busy.
```

The umount error can only be triggered by liburing write operation.

Thanks,
Heming