On Wed, Oct 28, 2020 at 03:24:34PM +0800, Ming Lei wrote: > Mounted NBD device can be resized, one use case is rbd-nbd. > > Fix the issue by setting up default block size, then not touch it > in nbd_size_update() any more. This kind of usage is aligned with loop > which has same use case too. I think the only reasonable fix here is to remove the set_blocksize call entirely. The concept of block size set by it is a file system construct and nbd has not business setting it at all.
