Add test for verifying io hang when enabling blk-iolatency after a few IOs have been done.
This is a regression test for "blk-iolatency: fix IO hang due to negative inflight counter". Signed-off-by: Liu Bo <[email protected]> --- tests/block/022 | 42 ++++++++++++++++++++++++++++++++++++++++++ tests/block/022.out | 2 ++ 2 files changed, 44 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..6e5ab42 --- /dev/null +++ b/tests/block/022 @@ -0,0 +1,42 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-3.0+ +# Copyright (C) 2019 Bo Liu <[email protected]> +# +# This test is a regression test for io hang due to blk-iolatency, the patch is +# "blk-iolatency: fix IO hang due to negative inflight counter" + +. tests/block/rc +. common/cgroup +. common/null_blk +DESCRIPTION="This test will demonstrate io hang due to blk-iolatency" + +requires() { + _have_null_blk && _have_cgroup2_controller_file io io.latency +} + +test() { + local CGROUP2_DIR + local dir + echo "Running ${TEST_NAME}" + + if ! _init_null_blk queue_mode=2; then + return 1 + fi + + _init_cgroup2 + dir=$(_cgroup2_base_dir) + + echo $$ > ${CGROUP2_DIR}/cgroup.procs + xfs_io -f -d -c "pwrite 0 4k" /dev/nullb0 + + # target=1s + echo "`cat /sys/block/nullb0/dev` target=1000000" > ${CGROUP2_DIR}/io.latency + + xfs_io -f -d -c "pwrite 0 4k" /dev/nullb0 + + echo $$ > ${dir}/cgroup.procs + _exit_cgroup2 + _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 -- 2.20.1.2.gb21ebb6
