On Mon, Sep 07, 2020 at 12:31:42PM +0530, Kanchan Joshi wrote:

But there are use-cases which benefit from supporting zone-append on
raw block-dev path.
Certain user-space log-structured/cow FS/DB will use the device that
way. Aerospike is one example.
Pass-through is synchronous, and we lose the ability to use io-uring.

So use zonefs, which is designed exactly for that use case.