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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-03-16 12:41:05 -0400 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-03-18 12:58:26 -0400 |
| commit | b94bc80df64823e676b506f8de7dcf6a688d681e (patch) | |
| tree | 6e81519228b10dea452886eb2bbc1ae8a1450877 /kernel/trace/trace.h | |
| parent | efe6196a6bc5bbc84b856316c4687fd24566a95c (diff) | |
| download | lwn-b94bc80df64823e676b506f8de7dcf6a688d681e.tar.gz lwn-b94bc80df64823e676b506f8de7dcf6a688d681e.zip | |
tracing: Use a no_filter_buffering_ref to stop using the filter buffer
Currently, the trace histograms relies on it using absolute time stamps to
trigger the tracing to not use the temp buffer if filters are set. That's
because the histograms need the full timestamp that is saved in the ring
buffer. That is no longer the case, as the ring_buffer_event_time_stamp()
can now return the time stamp for all events without all triggering a full
absolute time stamp.
Now that the absolute time stamp is an unrelated dependency to not using
the filters. There's nothing about having absolute timestamps to keep from
using the filter buffer. Instead, change the interface to explicitly state
to disable filter buffering that the histogram logic can use.
Link: https://lkml.kernel.org/r/20210316164113.847886563@goodmis.org
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 798773178d7e..f2a7a72825c7 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -352,7 +352,7 @@ struct trace_array { /* function tracing enabled */ int function_enabled; #endif - int time_stamp_abs_ref; + int no_filter_buffering_ref; struct list_head hist_vars; #ifdef CONFIG_TRACER_SNAPSHOT struct cond_snapshot *cond_snapshot; @@ -372,7 +372,7 @@ extern int tracing_check_open_get_tr(struct trace_array *tr); extern struct trace_array *trace_array_find(const char *instance); extern struct trace_array *trace_array_find_get(const char *instance); -extern int tracing_set_time_stamp_abs(struct trace_array *tr, bool abs); +extern int tracing_set_filter_buffering(struct trace_array *tr, bool set); extern int tracing_set_clock(struct trace_array *tr, const char *clockstr); extern bool trace_clock_in_ns(struct trace_array *tr); |