On Mon, 11 Sep 2023 13:09:09 -0400 Steven Rostedt <rost...@goodmis.org> wrote:
> On Sat, 9 Sep 2023 18:36:39 +0900 > "Masami Hiramatsu (Google)" <mhira...@kernel.org> wrote: > > > From: Masami Hiramatsu (Google) <mhira...@kernel.org> > > > > 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 <broo...@kernel.org> > > Link: > > https://lore.kernel.org/all/29fce076-746c-4650-8358-b4e0fa215...@sirena.org.uk/ > > Fixes: cbd965bde74c ("ftrace/selftests: Return the skip code when tracing > > directory not configured in kernel") > > Signed-off-by: Masami Hiramatsu (Google) <mhira...@kernel.org> > > --- > > tools/testing/selftests/ftrace/ftracetest | 8 ++++++++ > > 1 file changed, 8 insertions(+) > > > > diff --git a/tools/testing/selftests/ftrace/ftracetest > > b/tools/testing/selftests/ftrace/ftracetest > > index cb5f18c06593..89c212d82256 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 > $sched_rt_runtime > > + if [ "${UMOUNT_DIR}" ]; then > > Shouldn't the above be: > > if [ ! -z "${UNMOUNT_DIR}" ]; then > > ? I think both are good. What about using '-n' explictly? [ -n "${UNMOUNT_DIR}" ] Thanks, > > -- Steve > > > + umount ${UMOUNT_DIR} ||: > > + fi > > } > > > > errexit() { # message > > @@ -160,11 +166,13 @@ if [ -z "$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" > -- Masami Hiramatsu (Google) <mhira...@kernel.org>
