Test concurrent requeuing of zoned writes and request queue freezing. While
test test passes with kernel 6.9, it triggers a hang with kernels 6.10 and
later. This shows that this hang is a regression introduced by the zone
write plugging code.
sysrq: Show Blocked State
task:(udev-worker) state:D stack:0 pid:75392 tgid:75392 ppid:2178 flags:0x00000006
Call Trace:
<TASK>
__schedule+0x3e8/0x1410
schedule+0x27/0xf0
blk_mq_freeze_queue_wait+0x6f/0xa0
queue_attr_store+0x60/0xc0
kernfs_fop_write_iter+0x13e/0x1f0
vfs_write+0x25b/0x420
ksys_write+0x65/0xe0
do_syscall_64+0x82/0x160
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
tests/zbd/012 | 70 +++++++++++++++++++++++++++++++++++++++++++++++
tests/zbd/012.out | 2 ++
2 files changed, 72 insertions(+)
create mode 100644 tests/zbd/012
create mode 100644 tests/zbd/012.out
diff --git a/tests/zbd/012 b/tests/zbd/012
new file mode 100644
index 000000000000..0551d01011af
--- /dev/null
+++ b/tests/zbd/012
@@ -0,0 +1,70 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (C) 2024 Google LLC
+
+. tests/scsi/rc
+. common/scsi_debug
+
+DESCRIPTION="test requeuing of zoned writes and queue freezing"
+QUICK=1
+
+requires() {
+ _have_fio_zbd_zonemode
+}
+
+toggle_iosched() {
+ while true; do
+ for iosched in none mq-deadline; do
+ echo "${iosched}" > "/sys/class/block/$(basename "$zdev")/queue/scheduler"
+ sleep .1
+ done
+ done
+}
+
+test() {
+ echo "Running ${TEST_NAME}"
+
+ local qd=1
+ local scsi_debug_params=(
+ delay=0
+ dev_size_mb=1024
+ every_nth=$((2 * qd))
+ max_queue="${qd}"
+ opts=0x8000 # SDEBUG_OPT_HOST_BUSY
+ sector_size=4096
+ statistics=1
+ zbc=host-managed
+ zone_nr_conv=0
+ zone_size_mb=4
+ )
+ _init_scsi_debug "${scsi_debug_params[@]}" &&
+ local zdev="/dev/${SCSI_DEBUG_DEVICES[0]}" fail &&
+ ls -ld "${zdev}" >>"${FULL}" &&
+ { toggle_iosched & } &&
+ toggle_iosched_pid=$! &&
+ local fio_args=(
+ --direct=1
+ --filename="${zdev}"
+ --iodepth="${qd}"
+ --ioengine=io_uring
+ --ioscheduler=none
+ --name=pipeline-zoned-writes
+ --output="${RESULTS_DIR}/fio-output-zbd-092.txt"
+ --runtime="${TIMEOUT:-30}"
+ --rw=randwrite
+ --time_based
+ --zonemode=zbd
+ ) &&
+ _run_fio "${fio_args[@]}" >>"${FULL}" 2>&1 ||
+ fail=true
+
+ kill "${toggle_iosched_pid}" 2>&1
+ _exit_scsi_debug
+
+ if [ -z "$fail" ]; then
+ echo "Test complete"
+ else
+ echo "Test failed"
+ return 1
+ fi
+}
diff --git a/tests/zbd/012.out b/tests/zbd/012.out
new file mode 100644
index 000000000000..8ff654950c5f
--- /dev/null
+++ b/tests/zbd/012.out
@@ -0,0 +1,2 @@
+Running zbd/012
+Test complete
