Merge branch 'tracing/urgent' into tracing/ftrace

[pandora-kernel.git] / kernel / trace / trace.c

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 2230b46..32653c8 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -255,7 +255,8 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait);
 
 /* trace_flags holds trace_options default values */
 unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
-       TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME;
+       TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME |
+       TRACE_ITER_GRAPH_TIME;
 
 /**
  * trace_wake_up - wake up tasks waiting for trace input
@@ -317,6 +318,7 @@ static const char *trace_options[] = {
        "latency-format",
        "global-clock",
        "sleep-time",
+       "graph-time",
        NULL
 };
 
@@ -402,17 +404,6 @@ static ssize_t trace_seq_to_buffer(struct trace_seq *s, void *buf, size_t cnt)
        return cnt;
 }
 
-static void
-trace_print_seq(struct seq_file *m, struct trace_seq *s)
-{
-       int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
-
-       s->buffer[len] = 0;
-       seq_puts(m, s->buffer);
-
-       trace_seq_init(s);
-}
-
 /**
  * update_max_tr - snapshot all trace buffers from global_trace to max_tr
  * @tr: tracer
@@ -1632,7 +1623,11 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
                return;
 
        cpumask_set_cpu(iter->cpu, iter->started);
-       trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu);
+
+       /* Don't print started cpu buffer for the first entry of the trace */
+       if (iter->idx > 1)
+               trace_seq_printf(s, "##### CPU %u buffer started ####\n",
+                               iter->cpu);
 }
 
 static enum print_line_t print_trace_fmt(struct trace_iterator *iter)
@@ -1867,6 +1862,11 @@ __tracing_open(struct inode *inode, struct file *file)
        if (current_trace)
                *iter->trace = *current_trace;
 
+       if (!alloc_cpumask_var(&iter->started, GFP_KERNEL))
+               goto fail;
+
+       cpumask_clear(iter->started);
+
        if (current_trace && current_trace->print_max)
                iter->tr = &max_tr;
        else
@@ -1917,6 +1917,7 @@ __tracing_open(struct inode *inode, struct file *file)
                if (iter->buffer_iter[cpu])
                        ring_buffer_read_finish(iter->buffer_iter[cpu]);
        }
+       free_cpumask_var(iter->started);
  fail:
        mutex_unlock(&trace_types_lock);
        kfree(iter->trace);
@@ -1960,6 +1961,7 @@ static int tracing_release(struct inode *inode, struct file *file)
 
        seq_release(inode, file);
        mutex_destroy(&iter->mutex);
+       free_cpumask_var(iter->started);
        kfree(iter->trace);
        kfree(iter);
        return 0;
@@ -2358,9 +2360,9 @@ static const char readme_msg[] =
        "# mkdir /debug\n"
        "# mount -t debugfs nodev /debug\n\n"
        "# cat /debug/tracing/available_tracers\n"
-       "wakeup preemptirqsoff preemptoff irqsoff ftrace sched_switch none\n\n"
+       "wakeup preemptirqsoff preemptoff irqsoff function sched_switch nop\n\n"
        "# cat /debug/tracing/current_tracer\n"
-       "none\n"
+       "nop\n"
        "# echo sched_switch > /debug/tracing/current_tracer\n"
        "# cat /debug/tracing/current_tracer\n"
        "sched_switch\n"