[PATCH v2 blktests] block: add freeze/unfreeze sequence test

Bob Liu
2019-06-10T23:36:09Z

Reproduce the hang fixed by
7996a8b5511a ("blk-mq: fix hang caused by freeze/unfreeze sequence").

--
v2:
- Add 022.out

Signed-off-by: Bob Liu <bob.liu@oracle.com>
---
tests/block/022 | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/block/022.out | 2 ++
2 files changed, 61 insertions(+)
create mode 100755 tests/block/022
create mode 100644 tests/block/022.out

diff --git a/tests/block/022 b/tests/block/022
new file mode 100755
index 0000000..e3ac197
--- /dev/null
+++ b/tests/block/022
@@ -0,0 +1,59 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2019 Bob Liu <bob.liu@oracle.com>
+#
+# Test hang caused by freeze/unfreeze sequence. Regression
+# test for 7996a8b5511a ("blk-mq: fix hang caused by freeze/unfreeze sequence").
+
+. tests/block/rc
+. common/null_blk
+
+DESCRIPTION="Test hang caused by freeze/unfreeze sequence"
+TIMED=1
+
+requires() {
+ _have_null_blk && _have_module_param null_blk shared_tags
+}
+
+hotplug_test() {
+ while :
+ do
+ echo 1 > /sys/kernel/config/nullb/"$1"/power
+ echo 0 > /sys/kernel/config/nullb/"$1"/power
+ done
+}
+
+test() {
+ echo "Running ${TEST_NAME}"
+ : "${TIMEOUT:=30}"
+
+ if ! _init_null_blk shared_tags=1 nr_devices=0 queue_mode=2; then
+ return 1
+ fi
+
+ mkdir -p /sys/kernel/config/nullb/0
+ mkdir -p /sys/kernel/config/nullb/1
+ hotplug_test 0 &
+ pid0=$!
+ hotplug_test 1 &
+ pid1=$!
+
+ #bind process to two different CPU
+ taskset -p 1 $pid0 >/dev/null
+ taskset -p 2 $pid1 >/dev/null
+
+ sleep "$TIMEOUT"
+ {
+ kill -9 $pid0
+ wait $pid0
+ kill -9 $pid1
+ wait $pid1
+ } 2>/dev/null
+
+ rmdir /sys/kernel/config/nullb/1
+ rmdir /sys/kernel/config/nullb/0
+
+ _exit_null_blk
+ echo "Test complete"
+}
+
diff --git a/tests/block/022.out b/tests/block/022.out
new file mode 100644
index 0000000..14d43cb
--- /dev/null
+++ b/tests/block/022.out
@@ -0,0 +1,2 @@
+Running block/022
+Test complete
--
2.9.5