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| author |   Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-09-12 10:10:39 +0900 |
|---|---|---|
| committer |   Shuah Khan <skhan@linuxfoundation.org> | 2023-09-12 09:34:20 -0600 |
| commit | 7e021da80f48582171029714f8a487347f29dddb (patch) | |
| tree | 9dace07b4492013ef2492f3471b952d9d7f43ef1 /tools/testing/selftests/ftrace | |
| parent | selftests: user_events: create test-specific Kconfig fragments (diff) | |
| download | wireguard-linux-7e021da80f48582171029714f8a487347f29dddb.tar.xz wireguard-linux-7e021da80f48582171029714f8a487347f29dddb.zip | |
selftests: tracing: Fix to unmount tracefs for recovering environment
Fix to unmount the tracefs if the ftracetest mounted it for recovering
system environment. If the tracefs is already mounted, this does nothing.
Suggested-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/all/29fce076-746c-4650-8358-b4e0fa215cf7@sirena.org.uk/
Fixes: cbd965bde74c ("ftrace/selftests: Return the skip code when tracing directory not configured in kernel")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/testing/selftests/ftrace')
| -rwxr-xr-x | tools/testing/selftests/ftrace/ftracetest | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest index 7df8baa0f98f..c778d4dcc17e 100755 --- a/tools/testing/selftests/ftrace/ftracetest +++ b/tools/testing/selftests/ftrace/ftracetest @@ -31,6 +31,9 @@ err_ret=1 # kselftest skip code is 4 err_skip=4 +# umount required +UMOUNT_DIR="" + # cgroup RT scheduling prevents chrt commands from succeeding, which # induces failures in test wakeup tests. Disable for the duration of # the tests. @@ -45,6 +48,9 @@ setup() { cleanup() { echo $sched_rt_runtime_orig > $sched_rt_runtime + if [ -n "${UMOUNT_DIR}" ]; then + umount ${UMOUNT_DIR} ||: + fi } errexit() { # message @@ -161,11 +167,13 @@ if [ -z "$TRACING_DIR" ]; then mount -t tracefs nodev /sys/kernel/tracing || errexit "Failed to mount /sys/kernel/tracing" TRACING_DIR="/sys/kernel/tracing" + UMOUNT_DIR=${TRACING_DIR} # If debugfs exists, then so does /sys/kernel/debug elif [ -d "/sys/kernel/debug" ]; then mount -t debugfs nodev /sys/kernel/debug || errexit "Failed to mount /sys/kernel/debug" TRACING_DIR="/sys/kernel/debug/tracing" + UMOUNT_DIR=${TRACING_DIR} else err_ret=$err_skip errexit "debugfs and tracefs are not configured in this kernel" |