On Fri, Sep 02, 2022 at 10:38:50AM +0900, Damien Le Moal wrote:

On 9/1/22 16:42, Christoph Hellwig wrote:

quoted

No users left now that btrfs takes REQ_OP_WRITE bios from iomap and
splits and converts them to REQ_OP_ZONE_APPEND internally.

Hu... I wanted to use that for zonefs for doing ZONE APPEND with AIOs...
Need to revisit that code anyway, so fine for now.

We could resurrect it.  But I suspect that you're better off doing
what btrfs does here - let iomap submit a write bio and then split
it in the submit_bio hook.