* [LTP] [PATCH v7, 0/4] cgroup/cgroup_regression_test: Fix umount failure
@ 2021-08-24 12:12 Leo Liang
0 siblings, 0 replies; only message in thread
From: Leo Liang @ 2021-08-24 12:12 UTC (permalink / raw)
To: ltp
The test sequence
mount -t cgroup -o <controllers> <path>
mkdir <path>/<dir>
rmdir <path>/<dir>
umount <path>
mount -t cgroup -o <controllers> <path>
would easily fail at the last mount with -EBUSY on certain platform.
Adding a little delay between "rmdir" and "umount" could fix the problem,
so use tst_umount API instead of umount in "rmdir, umount" sequence.
tst_umount API is ambiguous when checking for whether a device is mounted.
Modify it to check an actual mount point instead of device
and reject anything that does not start with '/' as an argument.
Changes since v1
- Use "tst_umount" instead of "sync" as suggested
- Make "tst_umount" work with argument that has terminating slash
Changes since v2
- Filter out the trailing slash instead of using mountpoint command
Changes since v3
- Filter out the trailing slash only in grep command
- Add comment in the test script
Changes since v4
- Remove unnecessary stderr redirection
Changes since v5
- Make tst_umount to only accept absolute mount point as an argument
- Modify tests that use tst_umount to pass mount point in instead of device
Changes since v6
- Use grep instead of "bashism [[]]" to determine if the argument starts with '/'
- Change the default TST_MNTPOINT to $PWD/mntpoint
Leo Yu-Chi Liang (4):
lib: tst_umount: umount a mount point instead of a device
doc: change the default behavior of tst_umount
cgroup/cgroup_regression_test: Fix umount failure
Make argument to tst_umount an absolute path
doc/shell-test-api.txt | 8 ++++----
.../cgroup/cgroup_regression_test.sh | 10 +++++-----
.../fs/quota_remount/quota_remount_test01.sh | 2 +-
.../integrity/ima/tests/evm_overlay.sh | 2 +-
.../tracing/dynamic_debug/dynamic_debug01.sh | 2 +-
testcases/lib/tst_test.sh | 20 +++++++++++--------
6 files changed, 24 insertions(+), 20 deletions(-)
--
2.17.0
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2021-08-24 12:12 [LTP] [PATCH v7, 0/4] cgroup/cgroup_regression_test: Fix umount failure Leo Liang
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