RE: [PATCH v2 7/8] engines/io_uring: Enable zone device support for io_uring_cmd I/O engine

[Vincent Fu <vincent.fu@samsung.com>]

> -----Original Message-----
> From: Ankit Kumar [mailto:ankit.kumar@samsung.com]
> Sent: Thursday, May 26, 2022 10:48 AM
> To: axboe@kernel.dk
> Cc: fio@vger.kernel.org; krish.reddy@samsung.com;
> joshi.k@samsung.com; anuj20.g@samsung.com; Ankit Kumar
> <ankit.kumar@samsung.com>
> Subject: [PATCH v2 7/8] engines/io_uring: Enable zone device support
> for io_uring_cmd I/O engine
> 
> Add zone device specific ioengine_ops for io_uring_cmd.
> * get_zoned_model
> * report_zones
> * reset_wp
> * get_max_open_zones
> 
> Add the necessary NVMe ZNS specfication opcodes and strcutures. Add
> helper functions to submit admin and I/O passthrough commands for
> these
> new NVMe ZNS specific commands.
> 
> For write workload iodepth must be set to 1 as there is no IO scheduler
> 
> Signed-off-by: Ankit Kumar <ankit.kumar@samsung.com>

I ran the job file below on an emulated ZNS device under QEMU and found
no problems.

[global]
filename=/dev/ng0n1
ioengine=io_uring_cmd
cmd_type=nvme
zonemode=zbd
bs=256K
verify=crc32c
stonewall=1

[write-plain]
rw=randwrite

[randwrite-plain]
rw=randwrite

[write-opts]
rw=randwrite
registerfiles=1
sqthread_poll=1
sqthread_poll_cpu=0

[randwrite-opts]
rw=randwrite
registerfiles=1
sqthread_poll=1
sqthread_poll_cpu=0

Tested-by: Vincent Fu <vincent.fu@samsung.com>