On Fri, Mar 17, 2023 at 12:50:35PM -0700, Bart Van Assche wrote:
> Make it easier for filesystems to submit zone append bios that exceed
> the block device limits by adding support for REQ_OP_ZONE_APPEND in
> bio_split(). See also commit 0512a75b98f8 ("block: Introduce
> REQ_OP_ZONE_APPEND").
You can't do that. ZONE_APPEND reports the written sector in bi_sector,
so it can't be split.
> This patch is a bug fix for commit d5e4377d5051 because that commit
> introduces a call to bio_split() for zone append bios without adding
> support for splitting REQ_OP_ZONE_APPEND bios in bio_split().
That commit never splits ZONE_APPEND bios, and it pre-splits bios
about to become ZONE_APPEND bios specifically using bio_split_rw
instead of bio_split.
