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Commit 53664738 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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

Merge branch 'tip/tracing/ftrace' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into tracing/ftrace
parents c4ef144a e9d25fe6

kernel/trace/blktrace.c

+0 −1
Original line number Diff line number Diff line
@@ -1231,7 +1231,6 @@ static struct tracer blk_tracer __read_mostly = { 
static struct trace_event trace_blk_event = {

	.type	 	= TRACE_BLK,

	.trace		= blk_trace_event_print,

	.latency_trace	= blk_trace_event_print,

	.binary		= blk_trace_event_print_binary,

};

kernel/trace/ring_buffer.c

+5 −1
Original line number Diff line number Diff line
@@ -2461,6 +2461,7 @@ int ring_buffer_read_page(struct ring_buffer *buffer, 
	unsigned long flags;

	unsigned int commit;

	unsigned int read;

	u64 save_timestamp;

	int ret = -1;



	/*
@@ -2515,6 +2516,9 @@ int ring_buffer_read_page(struct ring_buffer *buffer, 
		if (len < size)

			goto out;



		/* save the current timestamp, since the user will need it */

		save_timestamp = cpu_buffer->read_stamp;



		/* Need to copy one event at a time */

		do {

			memcpy(bpage->data + pos, rpage->data + rpos, size);
@@ -2531,7 +2535,7 @@ int ring_buffer_read_page(struct ring_buffer *buffer, 


		/* update bpage */

		local_set(&bpage->commit, pos);

		bpage->time_stamp = rpage->time_stamp;

		bpage->time_stamp = save_timestamp;



		/* we copied everything to the beginning */

		read = 0;

kernel/trace/trace.c

+25 −58
Original line number Diff line number Diff line
@@ -299,6 +299,7 @@ static const char *trace_options[] = { 
	"sym-userobj",

	"printk-msg-only",

	"context-info",

	"latency-format",

	NULL

};
@@ -346,6 +347,9 @@ ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt) 
	int len;

	int ret;



	if (!cnt)

		return 0;



	if (s->len <= s->readpos)

		return -EBUSY;
@@ -353,10 +357,12 @@ ssize_t trace_seq_to_user(struct trace_seq *s, char __user *ubuf, size_t cnt) 
	if (cnt > len)

		cnt = len;

	ret = copy_to_user(ubuf, s->buffer + s->readpos, cnt);

	if (ret)

	if (ret == cnt)

		return -EFAULT;



	s->readpos += len;

	cnt -= ret;



	s->readpos += cnt;

	return cnt;

}
@@ -375,7 +381,7 @@ ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt) 
	if (!ret)

		return -EFAULT;



	s->readpos += len;

	s->readpos += cnt;

	return cnt;

}
@@ -1462,33 +1468,6 @@ static void test_cpu_buff_start(struct trace_iterator *iter) 
	trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu);

}



static enum print_line_t print_lat_fmt(struct trace_iterator *iter)

{

	struct trace_seq *s = &iter->seq;

	unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);

	struct trace_event *event;

	struct trace_entry *entry = iter->ent;



	test_cpu_buff_start(iter);



	event = ftrace_find_event(entry->type);



	if (trace_flags & TRACE_ITER_CONTEXT_INFO) {

		if (!trace_print_lat_context(iter))

			goto partial;

	}



	if (event)

		return event->latency_trace(iter, sym_flags);



	if (!trace_seq_printf(s, "Unknown type %d\n", entry->type))

		goto partial;



	return TRACE_TYPE_HANDLED;

partial:

	return TRACE_TYPE_PARTIAL_LINE;

}



static enum print_line_t print_trace_fmt(struct trace_iterator *iter)

{

	struct trace_seq *s = &iter->seq;
@@ -1503,9 +1482,14 @@ static enum print_line_t print_trace_fmt(struct trace_iterator *iter) 
	event = ftrace_find_event(entry->type);



	if (trace_flags & TRACE_ITER_CONTEXT_INFO) {

		if (iter->iter_flags & TRACE_FILE_LAT_FMT) {

			if (!trace_print_lat_context(iter))

				goto partial;

		} else {

			if (!trace_print_context(iter))

				goto partial;

		}

	}



	if (event)

		return event->trace(iter, sym_flags);
@@ -1646,9 +1630,6 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter) 
	if (trace_flags & TRACE_ITER_RAW)

		return print_raw_fmt(iter);



	if (iter->iter_flags & TRACE_FILE_LAT_FMT)

		return print_lat_fmt(iter);



	return print_trace_fmt(iter);

}
@@ -1824,26 +1805,12 @@ static int tracing_open(struct inode *inode, struct file *file) 
	iter = __tracing_open(inode, file);

	if (IS_ERR(iter))

		ret = PTR_ERR(iter);



	return ret;

}



static int tracing_lt_open(struct inode *inode, struct file *file)

{

	struct trace_iterator *iter;

	int ret = 0;



	iter = __tracing_open(inode, file);



	if (IS_ERR(iter))

		ret = PTR_ERR(iter);

	else

	else if (trace_flags & TRACE_ITER_LATENCY_FMT)

		iter->iter_flags |= TRACE_FILE_LAT_FMT;



	return ret;

}





static void *

t_next(struct seq_file *m, void *v, loff_t *pos)

{
@@ -1922,13 +1889,6 @@ static struct file_operations tracing_fops = { 
	.release	= tracing_release,

};



static struct file_operations tracing_lt_fops = {

	.open		= tracing_lt_open,

	.read		= seq_read,

	.llseek		= seq_lseek,

	.release	= tracing_release,

};



static struct file_operations show_traces_fops = {

	.open		= show_traces_open,

	.read		= seq_read,
@@ -3049,6 +3009,9 @@ tracing_buffers_read(struct file *filp, char __user *ubuf, 
	ssize_t ret;

	size_t size;



	if (!count)

		return 0;



	/* Do we have previous read data to read? */

	if (info->read < PAGE_SIZE)

		goto read;
@@ -3073,8 +3036,10 @@ tracing_buffers_read(struct file *filp, char __user *ubuf, 
		size = count;



	ret = copy_to_user(ubuf, info->spare + info->read, size);

	if (ret)

	if (ret == size)

		return -EFAULT;

	size -= ret;



	*ppos += size;

	info->read += size;
@@ -3918,8 +3883,10 @@ void ftrace_dump(void) 


	printk(KERN_TRACE "Dumping ftrace buffer:\n");



	/* Simulate the iterator */

	iter.tr = &global_trace;

	iter.trace = current_trace;

	iter.cpu_file = TRACE_PIPE_ALL_CPU;



	/*

	 * We need to stop all tracing on all CPUS to read the

kernel/trace/trace.h

+2 −1
Original line number Diff line number Diff line
@@ -651,7 +651,8 @@ enum trace_iterator_flags { 
	TRACE_ITER_USERSTACKTRACE       = 0x4000,

	TRACE_ITER_SYM_USEROBJ          = 0x8000,

	TRACE_ITER_PRINTK_MSGONLY	= 0x10000,

	TRACE_ITER_CONTEXT_INFO		= 0x20000 /* Print pid/cpu/time */

	TRACE_ITER_CONTEXT_INFO		= 0x20000, /* Print pid/cpu/time */

	TRACE_ITER_LATENCY_FMT		= 0x40000,

};



/*

kernel/trace/trace_branch.c

+0 −1
Original line number Diff line number Diff line
@@ -159,7 +159,6 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter, 
static struct trace_event trace_branch_event = {

	.type	 	= TRACE_BRANCH,

	.trace		= trace_branch_print,

	.latency_trace	= trace_branch_print,

};



static struct tracer branch_trace __read_mostly =