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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-14 01:40:50 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-14 01:40:50 +0300
commit8655e7e3ddec60603c4f6c14cdf642e2ba198df8 (patch)
tree711b6da2a665e26940c59b9db493c59d879f6cc6 /kernel/trace/trace_functions_graph.c
parent461d208cfbd1f0af26027b2c35ded515e54b1ee6 (diff)
parentb6345879ccbd9b92864fbd7eb8ac48acdb4d6b15 (diff)
downloadlinux-8655e7e3ddec60603c4f6c14cdf642e2ba198df8.tar.xz
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.c27
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;
}