The common bdev layer will split large WRITE ZEROES ranges into
multiple children requests based on the backend device's setting,
it will try to split up to 8 children requests at a time to avoid
flood requests.
Also add UT to cover different cases.
Change-Id: Id9505fbe1c297412ef97b1f73587b22bc43f770e
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7875
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
e7fbdf15fd