diff options
| author | Linus Torvalds | 2010-03-13 14:40:50 -0800 |
|---|---|---|
| committer | Linus Torvalds | 2010-03-13 14:40:50 -0800 |
| commit | 8655e7e3ddec60603c4f6c14cdf642e2ba198df8 (patch) | |
| tree | 711b6da2a665e26940c59b9db493c59d879f6cc6 /kernel/trace/trace_functions_graph.c | |
| parent | 461d208cfbd1f0af26027b2c35ded515e54b1ee6 (diff) | |
| parent | b6345879ccbd9b92864fbd7eb8ac48acdb4d6b15 (diff) | |
Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: Do not record user stack trace from NMI context
tracing: Disable buffer switching when starting or stopping trace
tracing: Use same local variable when resetting the ring buffer
function-graph: Init curr_ret_stack with ret_stack
ring-buffer: Move disabled check into preempt disable section
function-graph: Add tracing_thresh support to function_graph tracer
tracing: Update the comm field in the right variable in update_max_tr
function-graph: Use comment notation for func names of dangling '}'
function-graph: Fix unused reference to ftrace_set_func()
tracing: Fix warning in s_next of trace file ops
tracing: Include irqflags headers from trace clock
Diffstat (limited to 'kernel/trace/trace_functions_graph.c')
| -rw-r--r-- | kernel/trace/trace_functions_graph.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c index 3fc2a575664f..e6989d9b44da 100644 --- a/kernel/trace/trace_functions_graph.c +++ b/kernel/trace/trace_functions_graph.c @@ -237,6 +237,14 @@ int trace_graph_entry(struct ftrace_graph_ent *trace) return ret; } +int trace_graph_thresh_entry(struct ftrace_graph_ent *trace) +{ + if (tracing_thresh) + return 1; + else + return trace_graph_entry(trace); +} + static void __trace_graph_return(struct trace_array *tr, struct ftrace_graph_ret *trace, unsigned long flags, @@ -290,13 +298,26 @@ void set_graph_array(struct trace_array *tr) smp_mb(); } +void trace_graph_thresh_return(struct ftrace_graph_ret *trace) +{ + if (tracing_thresh && + (trace->rettime - trace->calltime < tracing_thresh)) + return; + else + trace_graph_return(trace); +} + static int graph_trace_init(struct trace_array *tr) { int ret; set_graph_array(tr); - ret = register_ftrace_graph(&trace_graph_return, - &trace_graph_entry); + if (tracing_thresh) + ret = register_ftrace_graph(&trace_graph_thresh_return, + &trace_graph_thresh_entry); + else + ret = register_ftrace_graph(&trace_graph_return, + &trace_graph_entry); if (ret) return ret; tracing_start_cmdline_record(); @@ -920,7 +941,7 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, if (!ret) return TRACE_TYPE_PARTIAL_LINE; } else { - ret = trace_seq_printf(s, "} (%ps)\n", (void *)trace->func); + ret = trace_seq_printf(s, "} /* %ps */\n", (void *)trace->func); if (!ret) return TRACE_TYPE_PARTIAL_LINE; } |