* [LTP] [PATCH v5, 2/2] cgroup/cgroup_regression_test: Fix umount failure
@ 2021-07-27 6:00 Leo Liang
0 siblings, 0 replies; only message in thread
From: Leo Liang @ 2021-07-27 6:00 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.
The reason is that this test sequence would have the chance of
missing a release code path when doing rmdir and umount.
Adding a little delay between "rmdir" and "umount" could fix the problem,
so use tst_umount API instead of umount in "rmdir, umount" sequence.
Fixes: #839
Signed-off-by: Leo Yu-Chi Liang <ycliang@andestech.com>
---
.../controllers/cgroup/cgroup_regression_test.sh | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh b/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh
index 1f7f3820e..bc4dbe151 100755
--- a/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh
+++ b/testcases/kernel/controllers/cgroup/cgroup_regression_test.sh
@@ -145,7 +145,7 @@ test2()
fi
rmdir cgroup/0 cgroup/1
- umount cgroup/
+ tst_umount cgroup/ # Avoid possible EBUSY error
}
#---------------------------------------------------------------------------
@@ -193,7 +193,7 @@ test3()
wait $pid2 2>/dev/null
rmdir $cpu_subsys_path/0 2> /dev/null
- umount cgroup/ 2> /dev/null
+ tst_umount cgroup/ # Avoid possible EBUSY error
check_kernel_bug
}
@@ -222,7 +222,7 @@ test4()
mount -t cgroup -o none,name=foo cgroup cgroup/
mkdir cgroup/0
rmdir cgroup/0
- umount cgroup/
+ tst_umount cgroup/ # Avoid possible EBUSY error
if dmesg | grep -q "MAX_LOCKDEP_SUBCLASSES too low"; then
tst_res TFAIL "lockdep BUG was found"
@@ -254,7 +254,7 @@ test5()
mount -t cgroup none cgroup 2> /dev/null
mkdir cgroup/0
rmdir cgroup/0
- umount cgroup/ 2> /dev/null
+ tst_umount cgroup/ # Avoid possible EBUSY error
check_kernel_bug
}
@@ -290,7 +290,7 @@ test6()
mount -t cgroup -o ns xxx cgroup/ > /dev/null 2>&1
rmdir cgroup/[1-9]* > /dev/null 2>&1
- umount cgroup/
+ tst_umount cgroup/ # Avoid possible EBUSY error
check_kernel_bug
}
--
2.17.0
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2021-07-27 6:00 UTC | newest]
Thread overview: (only message) (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-07-27 6:00 [LTP] [PATCH v5, 2/2] cgroup/cgroup_regression_test: Fix umount failure Leo Liang
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).