diff options
Diffstat (limited to 'Documentation/trace/ftrace.rst')
| -rw-r--r-- | Documentation/trace/ftrace.rst | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/Documentation/trace/ftrace.rst b/Documentation/trace/ftrace.rst index 2b74f96d09d5..af66a05e18cc 100644 --- a/Documentation/trace/ftrace.rst +++ b/Documentation/trace/ftrace.rst @@ -1205,6 +1205,19 @@ Here are the available options: default instance. The only way the top level instance has this flag cleared, is by it being set in another instance. + copy_trace_marker + If there are applications that hard code writing into the top level + trace_marker file (/sys/kernel/tracing/trace_marker or trace_marker_raw), + and the tooling would like it to go into an instance, this option can + be used. Create an instance and set this option, and then all writes + into the top level trace_marker file will also be redirected into this + instance. + + Note, by default this option is set for the top level instance. If it + is disabled, then writes to the trace_marker or trace_marker_raw files + will not be written into the top level file. If no instance has this + option set, then a write will error with the errno of ENODEV. + annotate It is sometimes confusing when the CPU buffers are full and one CPU buffer had a lot of events recently, thus @@ -3077,7 +3090,7 @@ Notice that we lost the sys_nanosleep. # cat set_ftrace_filter hrtimer_run_queues hrtimer_run_pending - hrtimer_init + hrtimer_setup hrtimer_cancel hrtimer_try_to_cancel hrtimer_forward @@ -3115,7 +3128,7 @@ Again, now we want to append. # cat set_ftrace_filter hrtimer_run_queues hrtimer_run_pending - hrtimer_init + hrtimer_setup hrtimer_cancel hrtimer_try_to_cancel hrtimer_forward |