On Tue, 2 Jul 2019 23:18:08 -0400 Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > On Wed, 3 Jul 2019 12:09:53 +0900 > Masami Hiramatsu <mhiramat@xxxxxxxxxx> wrote: > > > > Would something like that work? > > > > For older kernel, I think we'd better try to mount debugfs first. > > Sure, that's pretty trivial to do. Or what I was thinking, try it if it > fails: > > if [ -z "$TRACING_DIR" ]; then > save_err=$err_ret > err_ret=$err_skip > if mount -t tracefs nodev /sys/kernel/tracing; then > TRACING_DIR="/sys/kernel/tracing" > elif mount -t debugfs nodev /sys/kernel/debug; then > TRACING_DIR="/sys/kernel/debug/tracing" > else > errexit "debugfs is not configured in this kernel" > fi > if [ ! -d "$TRACING_DIR" ]; then > errexit "ftrace is not configured in this kernel" > fi > err_ret=$save_err > fi This looks good to me :) Thank you, > > -- Steve -- Masami Hiramatsu <mhiramat@xxxxxxxxxx>
