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-rw-r--r--kernel/trace/trace.c9
-rw-r--r--kernel/trace/trace_events.c5
-rw-r--r--kernel/trace/trace_functions_graph.c16
-rw-r--r--kernel/trace/trace_output.c10
4 files changed, 30 insertions, 10 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1a37da2e8534..3b918283cf94 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -886,6 +886,7 @@ tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags,
entry->preempt_count = pc & 0xff;
entry->pid = (tsk) ? tsk->pid : 0;
+ entry->lock_depth = (tsk) ? tsk->lock_depth : 0;
entry->flags =
#ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT
(irqs_disabled_flags(flags) ? TRACE_FLAG_IRQS_OFF : 0) |
@@ -1530,10 +1531,10 @@ static void print_lat_help_header(struct seq_file *m)
seq_puts(m, "# | / _----=> need-resched \n");
seq_puts(m, "# || / _---=> hardirq/softirq \n");
seq_puts(m, "# ||| / _--=> preempt-depth \n");
- seq_puts(m, "# |||| / \n");
- seq_puts(m, "# ||||| delay \n");
- seq_puts(m, "# cmd pid ||||| time | caller \n");
- seq_puts(m, "# \\ / ||||| \\ | / \n");
+ seq_puts(m, "# |||| /_--=> lock-depth \n");
+ seq_puts(m, "# |||||/ delay \n");
+ seq_puts(m, "# cmd pid |||||| time | caller \n");
+ seq_puts(m, "# \\ / |||||| \\ | / \n");
}
static void print_func_help_header(struct seq_file *m)
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 28d92027a93c..975f324a07e7 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -86,6 +86,7 @@ int trace_define_common_fields(struct ftrace_event_call *call)
__common_field(unsigned char, flags);
__common_field(unsigned char, preempt_count);
__common_field(int, pid);
+ __common_field(int, lock_depth);
return ret;
}
@@ -571,11 +572,13 @@ static int trace_write_header(struct trace_seq *s)
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
+ "\tfield:%s %s;\toffset:%zu;\tsize:%zu;\n"
"\n",
FIELD(unsigned short, type),
FIELD(unsigned char, flags),
FIELD(unsigned char, preempt_count),
- FIELD(int, pid));
+ FIELD(int, pid),
+ FIELD(int, lock_depth));
}
static ssize_t
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index ee791a9650c5..48af49374384 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -368,6 +368,7 @@ static enum print_line_t
print_graph_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
{
int hardirq, softirq;
+ int ret;
hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
@@ -382,6 +383,13 @@ print_graph_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
hardirq ? 'h' : softirq ? 's' : '.'))
return 0;
+ if (entry->lock_depth < 0)
+ ret = trace_seq_putc(s, '.');
+ else
+ ret = trace_seq_printf(s, "%d", entry->lock_depth);
+ if (!ret)
+ return 0;
+
if (entry->preempt_count)
return trace_seq_printf(s, "%x", entry->preempt_count);
return trace_seq_puts(s, ".");
@@ -1001,8 +1009,8 @@ static void print_lat_header(struct seq_file *s)
seq_printf(s, "#%.*s / _----=> need-resched \n", size, spaces);
seq_printf(s, "#%.*s| / _---=> hardirq/softirq \n", size, spaces);
seq_printf(s, "#%.*s|| / _--=> preempt-depth \n", size, spaces);
- seq_printf(s, "#%.*s||| / \n", size, spaces);
- seq_printf(s, "#%.*s|||| \n", size, spaces);
+ seq_printf(s, "#%.*s||| / _-=> lock-depth \n", size, spaces);
+ seq_printf(s, "#%.*s|||| / \n", size, spaces);
}
static void print_graph_headers(struct seq_file *s)
@@ -1021,7 +1029,7 @@ static void print_graph_headers(struct seq_file *s)
if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC)
seq_printf(s, " TASK/PID ");
if (lat)
- seq_printf(s, "||||");
+ seq_printf(s, "|||||");
if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)
seq_printf(s, " DURATION ");
seq_printf(s, " FUNCTION CALLS\n");
@@ -1035,7 +1043,7 @@ static void print_graph_headers(struct seq_file *s)
if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC)
seq_printf(s, " | | ");
if (lat)
- seq_printf(s, "||||");
+ seq_printf(s, "|||||");
if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)
seq_printf(s, " | | ");
seq_printf(s, " | | | |\n");
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index be34a6aa7e4d..29a370a45582 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -465,6 +465,7 @@ lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
{
int hardirq, softirq;
char comm[TASK_COMM_LEN];
+ int ret;
trace_find_cmdline(entry->pid, comm);
hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
@@ -481,9 +482,16 @@ lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
hardirq ? 'h' : softirq ? 's' : '.'))
return 0;
+ if (entry->lock_depth < 0)
+ ret = trace_seq_putc(s, '.');
+ else
+ ret = trace_seq_printf(s, "%d", entry->lock_depth);
+ if (!ret)
+ return 0;
+
if (entry->preempt_count)
return trace_seq_printf(s, "%x", entry->preempt_count);
- return trace_seq_puts(s, ".");
+ return trace_seq_putc(s, '.');
}
static unsigned long preempt_mark_thresh = 100;

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