On Tue, 2 Jul 2019 23:18:08 -0400 Steven Rostedt rostedt@goodmis.org wrote:
On Wed, 3 Jul 2019 12:09:53 +0900 Masami Hiramatsu mhiramat@kernel.org 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