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Commit 915a0b57 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge branch 'tip/tracing/core' of... 

Merge branch 'tip/tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/urgent
parents e02c4fd3 0e950173

kernel/trace/ftrace.c

+2 −4
Original line number Diff line number Diff line
@@ -84,10 +84,6 @@ ftrace_func_t ftrace_trace_function __read_mostly = ftrace_stub; 
ftrace_func_t __ftrace_trace_function __read_mostly = ftrace_stub;

ftrace_func_t ftrace_pid_function __read_mostly = ftrace_stub;



#ifdef CONFIG_FUNCTION_GRAPH_TRACER

static int ftrace_set_func(unsigned long *array, int *idx, char *buffer);

#endif



static void ftrace_list_func(unsigned long ip, unsigned long parent_ip)

{

	struct ftrace_ops *op = ftrace_list;
@@ -2276,6 +2272,8 @@ __setup("ftrace_filter=", set_ftrace_filter); 


#ifdef CONFIG_FUNCTION_GRAPH_TRACER

static char ftrace_graph_buf[FTRACE_FILTER_SIZE] __initdata;

static int ftrace_set_func(unsigned long *array, int *idx, char *buffer);



static int __init set_graph_function(char *str)

{

	strlcpy(ftrace_graph_buf, str, FTRACE_FILTER_SIZE);

kernel/trace/trace.c

+20 −4
Original line number Diff line number Diff line
@@ -374,6 +374,21 @@ static int __init set_buf_size(char *str) 
}

__setup("trace_buf_size=", set_buf_size);



static int __init set_tracing_thresh(char *str)

{

	unsigned long threshhold;

	int ret;



	if (!str)

		return 0;

	ret = strict_strtoul(str, 0, &threshhold);

	if (ret < 0)

		return 0;

	tracing_thresh = threshhold * 1000;

	return 1;

}

__setup("tracing_thresh=", set_tracing_thresh);



unsigned long nsecs_to_usecs(unsigned long nsecs)

{

	return nsecs / 1000;
@@ -579,9 +594,10 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt) 
static arch_spinlock_t ftrace_max_lock =

	(arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;



unsigned long __read_mostly	tracing_thresh;



#ifdef CONFIG_TRACER_MAX_TRACE

unsigned long __read_mostly	tracing_max_latency;

unsigned long __read_mostly	tracing_thresh;



/*

 * Copy the new maximum trace into the separate maximum-trace
@@ -592,7 +608,7 @@ static void 
__update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)

{

	struct trace_array_cpu *data = tr->data[cpu];

	struct trace_array_cpu *max_data = tr->data[cpu];

	struct trace_array_cpu *max_data;



	max_tr.cpu = cpu;

	max_tr.time_start = data->preempt_timestamp;
@@ -602,7 +618,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu) 
	max_data->critical_start = data->critical_start;

	max_data->critical_end = data->critical_end;



	memcpy(data->comm, tsk->comm, TASK_COMM_LEN);

	memcpy(max_data->comm, tsk->comm, TASK_COMM_LEN);

	max_data->pid = tsk->pid;

	max_data->uid = task_uid(tsk);

	max_data->nice = tsk->static_prio - 20 - MAX_RT_PRIO;
@@ -4249,10 +4265,10 @@ static __init int tracer_init_debugfs(void) 
#ifdef CONFIG_TRACER_MAX_TRACE

	trace_create_file("tracing_max_latency", 0644, d_tracer,

			&tracing_max_latency, &tracing_max_lat_fops);

#endif



	trace_create_file("tracing_thresh", 0644, d_tracer,

			&tracing_thresh, &tracing_max_lat_fops);

#endif



	trace_create_file("README", 0444, d_tracer,

			NULL, &tracing_readme_fops);

kernel/trace/trace.h

+2 −1
Original line number Diff line number Diff line
@@ -396,9 +396,10 @@ extern int process_new_ksym_entry(char *ksymname, int op, unsigned long addr); 


extern unsigned long nsecs_to_usecs(unsigned long nsecs);



extern unsigned long tracing_thresh;



#ifdef CONFIG_TRACER_MAX_TRACE

extern unsigned long tracing_max_latency;

extern unsigned long tracing_thresh;



void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);

void update_max_tr_single(struct trace_array *tr,

kernel/trace/trace_functions_graph.c

+24 −3
Original line number Diff line number Diff line
@@ -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,
@@ -290,11 +298,24 @@ 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);

	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)
@@ -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;

	}