Recent changes (master)

[Jens Axboe <axboe@kernel.dk>]

The following changes since commit c77fe6859b6ef937a6ca900c1fab009175d721f8:

  engines/http: use proper error value (2023-12-15 13:17:13 -0700)

are available in the Git repository at:

  git://git.kernel.dk/fio.git master

for you to fetch changes up to be943a3ef5d94d8a9fefa11dc004789f66beb8e6:

  t/zbd: add test case to confirm no write with rwmixwrite=0 option (2023-12-19 19:52:35 -0700)

----------------------------------------------------------------
Shin'ichiro Kawasaki (2):
      zbd: avoid write with rwmixwrite=0 option
      t/zbd: add test case to confirm no write with rwmixwrite=0 option

 t/zbd/test-zbd-support | 23 +++++++++++++++++++++++
 zbd.c                  |  3 ++-
 2 files changed, 25 insertions(+), 1 deletion(-)

---

Diff of recent changes:

diff --git a/t/zbd/test-zbd-support b/t/zbd/test-zbd-support
index 2f15a191..532860eb 100755
--- a/t/zbd/test-zbd-support
+++ b/t/zbd/test-zbd-support
@@ -1561,6 +1561,29 @@ test67() {
 	grep -q 'Exceeded max_active_zones limit' "${logfile}.${test_number}"
 }
 
+# Test rw=randrw and rwmixwrite=0 options do not issue write I/O unit
+test68() {
+	local off size
+
+	require_zbd || return "$SKIP_TESTCASE"
+
+	reset_zone "${dev}" -1
+
+	# Write some data as preparation
+	off=$((first_sequential_zone_sector * 512))
+	size=$min_seq_write_size
+	run_one_fio_job "$(ioengine "psync")" --rw=write --offset="$off" \
+			--io_size="$size" --zonemode=strided \
+			--zonesize="$zone_size" --zonerange="$zone_size" \
+		       >> "${logfile}.${test_number}" 2>&1 || return $?
+	# Run random mixed read and write specifying zero write ratio
+	run_fio_on_seq "$(ioengine "psync")" --rw=randrw --rwmixwrite=0 \
+		       --time_based --runtime=1s \
+		       >> "${logfile}.${test_number}" 2>&1 || return $?
+	# "WRITE:" shall be recoreded only once for the preparation
+	[[ $(grep -c "WRITE:" "${logfile}.${test_number}") == 1 ]]
+}
+
 SECONDS=0
 tests=()
 dynamic_analyzer=()
diff --git a/zbd.c b/zbd.c
index c4f7b12f..61b5b688 100644
--- a/zbd.c
+++ b/zbd.c
@@ -1876,7 +1876,8 @@ enum fio_ddir zbd_adjust_ddir(struct thread_data *td, struct io_u *io_u,
 	if (ddir != DDIR_READ || !td_rw(td))
 		return ddir;
 
-	if (io_u->file->last_start[DDIR_WRITE] != -1ULL || td->o.read_beyond_wp)
+	if (io_u->file->last_start[DDIR_WRITE] != -1ULL ||
+	    td->o.read_beyond_wp || td->o.rwmix[DDIR_WRITE] == 0)
 		return DDIR_READ;
 
 	return DDIR_WRITE;