c458a6206d
If there's no tracefs (RHEL7) support the tracing_path_mount
returns debugfs path which results in following fail:
# perf probe sys_write
kprobe_events file does not exist - please rebuild kernel with CONFIG_KPROBE_EVENTS.
Error: Failed to add events.
In tracing_path_debugfs_mount function we need to return the
'tracing' path instead of just the mount to make it work:
# perf probe sys_write
Added new event:
probe:sys_write (on sys_write)
You can now use it in all perf tools, such as:
perf record -e probe:sys_write -aR sleep 1
Adding the 'return tracing_path;' also to tracing_path_tracefs_mount
function just for consistency with tracing_path_debugfs_mount.
Upstream keeps working, because it has the tracefs support.
Link: http://lkml.kernel.org/n/tip-yiwkzexq9fk1ey1xg3gnjlw4@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Fixes:
|
||
|---|---|---|
| .. | ||
| api | ||
| bpf | ||
| lockdep | ||
| subcmd | ||
| symbol | ||
| traceevent | ||
| bitmap.c | ||
| find_bit.c | ||
| hweight.c | ||
| rbtree.c | ||
| str_error_r.c | ||
| string.c | ||
| vsprintf.c | ||