On Tue, 2 Jul 2019 21:07:30 -0400 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > On Wed, 3 Jul 2019 09:11:47 +0900 > Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > > Hi Po-Hsu Lin, > > > > On Tue, 2 Jul 2019 13:22:26 -0600 > > shuah <shuah@xxxxxxxxxx> wrote: > > > > > Hi Po-Hsu Lin, > > > > > > On 7/2/19 12:23 AM, Po-Hsu Lin wrote: > > > > The ftrace test will need to have CONFIG_FTRACE enabled to make the > > > > ftrace directory available. > > > > > > > > Add an additional check to skip this test if the CONFIG_FTRACE was not > > > > enabled. > > > > Sorry, NAK for config check. > > Agreed, as my test boxes do not hold the source code of the kernel > they are running. > > > > > > > > > > > This will be helpful to avoid a false-positive test result when testing > > > > it directly with the following commad against a kernel that does not > > > > have CONFIG_FTRACE enabled: > > > > Would you know tools/testing/selftests/ftrace/config (and other config files > > in each tests) ? > > > > Since each selftest depends specific configurations, those configs are > > written in config file, and tester must enable it using > > "scripts/kconfig/merge_config.sh". > > > > We can not check the kernel config in some cases, e.g. distro kernel, > > cross-build kernel, remote build kernel etc. Also, the .config file > > can be a config file for another kernel build. > > > > So please take care of your kernel configuration. If you find any test > > failed even if you enable configs in config file under that test, please > > report it, since that is a bug. > > > > > > Thank you, > > > > > > make -C tools/testing/selftests TARGETS=ftrace run_tests > > > > > > > > The test result on an Ubuntu KVM kernel will be changed from: > > > > selftests: ftrace: ftracetest > > > > ======================================== > > > > Error: No ftrace directory found > > > > not ok 1..1 selftests: ftrace: ftracetest [FAIL] > > > > To: > > > > > > Thanks for the patch. > > > > > > Check patch fails with the above To: > > > > > > WARNING: Use a single space after To: > > > #107: > > > To: > > > > > > ERROR: Unrecognized email address: '' > > > #107: > > > To: > > > > > > total: 1 errors, 1 warnings, 23 lines checked > > > > > > > > > Please fix and send v2. > > > > > > > selftests: ftrace: ftracetest > > > > ======================================== > > > > CONFIG_FTRACE was not enabled, test skipped. > > > > not ok 1..1 selftests: ftrace: ftracetest [SKIP] > > > > > > > > Signed-off-by: Po-Hsu Lin <po-hsu.lin@xxxxxxxxxxxxx> > > > > --- > > > > tools/testing/selftests/ftrace/ftracetest | 11 ++++++++++- > > > > 1 file changed, 10 insertions(+), 1 deletion(-) > > > > > > > > diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest > > > > index 6d5e9e8..6c8322e 100755 > > > > --- a/tools/testing/selftests/ftrace/ftracetest > > > > +++ b/tools/testing/selftests/ftrace/ftracetest > > > > @@ -7,6 +7,9 @@ > > > > # Written by Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx> > > > > # > > > > > > Hmm. You havem't cc'ed Masami on this. Adding Masami. > > > > > > I would think Masami should be on the Signed-off-by as well, > > > since he is the author. > > > > > > > > > > > +# Kselftest framework requirement - SKIP code is 4. > > > > +ksft_skip=4 > > > > + > > > > usage() { # errno [message] > > > > [ ! -z "$2" ] && echo $2 > > > > echo "Usage: ftracetest [options] [testcase(s)] [testcase-directory(s)]" > > > > @@ -139,7 +142,13 @@ parse_opts $* > > > > > > > > # Verify parameters > > > > if [ -z "$TRACING_DIR" -o ! -d "$TRACING_DIR" ]; then > > I'm thinking if we didn't find the TRACING_DIR (-z "$TRACING_DIR" > returns true), then we exit with the skip. I don't believe we should be > testing ftrace if tracefs isn't even loaded. Or something like: Yeah, it should be skipped. > > err_ret=1 > err_skip=4 > > errexit() { > echo "Error: $1" 1>&2 > exit $err_ret > } > > [..] > > if [ -z "$TRACING_DIR" ]; then > save_err=$err_ret > err_ret=$err_skip > mount -t tracefs nodev /sys/kernel/tracing || > errexit "kernel does not have tracefs" > err_ret=$save_err > TRACING_DIR="/sys/kernel/tracing" > fi > if [ ! -d "$TRACING_DIR" ]; then > errexit "tracefs is not a directory?" > fi > > Would something like that work? For older kernel, I think we'd better try to mount debugfs first. Thank you, -- Masami Hiramatsu <mhiramat@xxxxxxxxxx>