On Wed, Oct 28, 2026 at 10:27:08AM +0800, [email protected] wrote: > I looked into adding blktests coverage, and there is a structural > problem. blktests cannot issue REQ_OP_ZONE_APPEND from userspace: fio's > --zone_append goes through the io_uring_cmd NVMe passthrough path, so it > never reaches the driver's zone-append completion, and zbdioctl has no > append operation. blktests has no zone-append test today for the same > reason.
Right. > That does not fit blktests, which is a block-layer test suite driven > from userspace. Two options as I see it: > > 1. an XFS reproducer (e.g. xfstests) - the one that actually > exercises the append completion path, or > 2. a blktests zbd test that covers a zoned virtio-blk with poll > queues, which would not reach the append part itself. > > I am happy to write either, or to leave it if you think the coverage > is not worth the churn. Which do you prefer? We do have some blktests test that use a file system in the zbd category (zbd/009, zbd/010, zbd/014) so I think we could do this in blktests. I.e. do a blktest that tests zoned polled I/O if we're on a zoned device that support polling.
