On 12/22/21 8:27 AM, Tetsuo Handa wrote:
> The kernel test robot is reporting that xfstest can fail at
>
> umount ext2 on xfs
> umount xfs
>
> sequence, for commit 322c4293ecc58110 ("loop: make autoclear operation
> asynchronous") broke what commit ("loop: Make explicit loop device
> destruction lazy") wanted to achieve.
>
> Although we cannot guarantee that nobody is holding a reference when
> "umount xfs" is called, we should try to close a race window opened
> by asynchronous autoclear operation.
>
> Try to make the autoclear operation upon close() synchronous, by calling
> __loop_clr_fd() from current thread's task work rather than a WQ thread.
Doesn't this potentially race with fput?
--
Jens Axboe
