On Thu, Jan 27, 2022 at 11:42:56AM +0100, Jan Kara wrote:

Maybe worth a comment like:

	/*
	 * No IO can be running at this point since there are no openers
	 * (covers filesystems, stacked devices, AIO) and the page cache is
	 * evicted.
	 */

I really don't see the point to add this to a specific driver instance.
It is a block layer guarantee so maybe we should document it better
there, but certainly not duplicate it in all the instances.