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-rw-r--r--include/linux/ftrace_event.h2
-rw-r--r--kernel/trace/blktrace.c4
-rw-r--r--kernel/trace/trace.c486
-rw-r--r--kernel/trace/trace.h37
-rw-r--r--kernel/trace/trace_functions.c8
-rw-r--r--kernel/trace/trace_functions_graph.c12
-rw-r--r--kernel/trace/trace_irqsoff.c10
-rw-r--r--kernel/trace/trace_kdb.c8
-rw-r--r--kernel/trace/trace_mmiotrace.c12
-rw-r--r--kernel/trace/trace_output.c2
-rw-r--r--kernel/trace/trace_sched_switch.c8
-rw-r--r--kernel/trace/trace_sched_wakeup.c16
-rw-r--r--kernel/trace/trace_selftest.c42
-rw-r--r--kernel/trace/trace_syscalls.c4
14 files changed, 365 insertions, 286 deletions
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index d6964244e567..d84c4a575514 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -8,6 +8,7 @@
#include <linux/perf_event.h>
struct trace_array;
+struct trace_buffer;
struct tracer;
struct dentry;
@@ -67,6 +68,7 @@ struct trace_entry {
struct trace_iterator {
struct trace_array *tr;
struct tracer *trace;
+ struct trace_buffer *trace_buffer;
void *private;
int cpu_file;
struct mutex mutex;
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 71259e2b6b61..90a55054744c 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -72,7 +72,7 @@ static void trace_note(struct blk_trace *bt, pid_t pid, int action,
bool blk_tracer = blk_tracer_enabled;
if (blk_tracer) {
- buffer = blk_tr->buffer;
+ buffer = blk_tr->trace_buffer.buffer;
pc = preempt_count();
event = trace_buffer_lock_reserve(buffer, TRACE_BLK,
sizeof(*t) + len,
@@ -218,7 +218,7 @@ static void __blk_add_trace(struct blk_trace *bt, sector_t sector, int bytes,
if (blk_tracer) {
tracing_record_cmdline(current);
- buffer = blk_tr->buffer;
+ buffer = blk_tr->trace_buffer.buffer;
pc = preempt_count();
event = trace_buffer_lock_reserve(buffer, TRACE_BLK,
sizeof(*t) + pdu_len,
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index c8a852a55db4..a08c127db865 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -195,27 +195,15 @@ cycle_t ftrace_now(int cpu)
u64 ts;
/* Early boot up does not have a buffer yet */
- if (!global_trace.buffer)
+ if (!global_trace.trace_buffer.buffer)
return trace_clock_local();
- ts = ring_buffer_time_stamp(global_trace.buffer, cpu);
- ring_buffer_normalize_time_stamp(global_trace.buffer, cpu, &ts);
+ ts = ring_buffer_time_stamp(global_trace.trace_buffer.buffer, cpu);
+ ring_buffer_normalize_time_stamp(global_trace.trace_buffer.buffer, cpu, &ts);
return ts;
}
-/*
- * The max_tr is used to snapshot the global_trace when a maximum
- * latency is reached. Some tracers will use this to store a maximum
- * trace while it continues examining live traces.
- *
- * The buffers for the max_tr are set up the same as the global_trace.
- * When a snapshot is taken, the link list of the max_tr is swapped
- * with the link list of the global_trace and the buffers are reset for
- * the global_trace so the tracing can continue.
- */
-static struct trace_array max_tr;
-
int tracing_is_enabled(void)
{
return tracing_is_on();
@@ -339,8 +327,8 @@ unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
*/
void tracing_on(void)
{
- if (global_trace.buffer)
- ring_buffer_record_on(global_trace.buffer);
+ if (global_trace.trace_buffer.buffer)
+ ring_buffer_record_on(global_trace.trace_buffer.buffer);
/*
* This flag is only looked at when buffers haven't been
* allocated yet. We don't really care about the race
@@ -361,8 +349,8 @@ EXPORT_SYMBOL_GPL(tracing_on);
*/
void tracing_off(void)
{
- if (global_trace.buffer)
- ring_buffer_record_off(global_trace.buffer);
+ if (global_trace.trace_buffer.buffer)
+ ring_buffer_record_off(global_trace.trace_buffer.buffer);
/*
* This flag is only looked at when buffers haven't been
* allocated yet. We don't really care about the race
@@ -378,8 +366,8 @@ EXPORT_SYMBOL_GPL(tracing_off);
*/
int tracing_is_on(void)
{
- if (global_trace.buffer)
- return ring_buffer_record_is_on(global_trace.buffer);
+ if (global_trace.trace_buffer.buffer)
+ return ring_buffer_record_is_on(global_trace.trace_buffer.buffer);
return !global_trace.buffer_disabled;
}
EXPORT_SYMBOL_GPL(tracing_is_on);
@@ -637,13 +625,14 @@ unsigned long __read_mostly tracing_max_latency;
static void
__update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
{
- struct trace_array_cpu *data = per_cpu_ptr(tr->data, cpu);
- struct trace_array_cpu *max_data;
+ struct trace_buffer *trace_buf = &tr->trace_buffer;
+ struct trace_buffer *max_buf = &tr->max_buffer;
+ struct trace_array_cpu *data = per_cpu_ptr(trace_buf->data, cpu);
+ struct trace_array_cpu *max_data = per_cpu_ptr(max_buf->data, cpu);
- max_tr.cpu = cpu;
- max_tr.time_start = data->preempt_timestamp;
+ max_buf->cpu = cpu;
+ max_buf->time_start = data->preempt_timestamp;
- max_data = per_cpu_ptr(max_tr.data, cpu);
max_data->saved_latency = tracing_max_latency;
max_data->critical_start = data->critical_start;
max_data->critical_end = data->critical_end;
@@ -686,9 +675,9 @@ update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
arch_spin_lock(&ftrace_max_lock);
- buf = tr->buffer;
- tr->buffer = max_tr.buffer;
- max_tr.buffer = buf;
+ buf = tr->trace_buffer.buffer;
+ tr->trace_buffer.buffer = tr->max_buffer.buffer;
+ tr->max_buffer.buffer = buf;
__update_max_tr(tr, tsk, cpu);
arch_spin_unlock(&ftrace_max_lock);
@@ -716,7 +705,7 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
arch_spin_lock(&ftrace_max_lock);
- ret = ring_buffer_swap_cpu(max_tr.buffer, tr->buffer, cpu);
+ ret = ring_buffer_swap_cpu(tr->max_buffer.buffer, tr->trace_buffer.buffer, cpu);
if (ret == -EBUSY) {
/*
@@ -725,7 +714,7 @@ update_max_tr_single(struct trace_array *tr, struct task_struct *tsk, int cpu)
* the max trace buffer (no one writes directly to it)
* and flag that it failed.
*/
- trace_array_printk(&max_tr, _THIS_IP_,
+ trace_array_printk_buf(tr->max_buffer.buffer, _THIS_IP_,
"Failed to swap buffers due to commit in progress\n");
}
@@ -742,7 +731,7 @@ static void default_wait_pipe(struct trace_iterator *iter)
if (trace_buffer_iter(iter, iter->cpu_file))
return;
- ring_buffer_wait(iter->tr->buffer, iter->cpu_file);
+ ring_buffer_wait(iter->trace_buffer->buffer, iter->cpu_file);
}
/**
@@ -803,17 +792,19 @@ int register_tracer(struct tracer *type)
* internal tracing to verify that everything is in order.
* If we fail, we do not register this tracer.
*/
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
tr->current_trace = type;
+#ifdef CONFIG_TRACER_MAX_TRACE
if (type->use_max_tr) {
/* If we expanded the buffers, make sure the max is expanded too */
if (ring_buffer_expanded)
- ring_buffer_resize(max_tr.buffer, trace_buf_size,
+ ring_buffer_resize(tr->max_buffer.buffer, trace_buf_size,
RING_BUFFER_ALL_CPUS);
type->allocated_snapshot = true;
}
+#endif
/* the test is responsible for initializing and enabling */
pr_info("Testing tracer %s: ", type->name);
@@ -827,16 +818,18 @@ int register_tracer(struct tracer *type)
goto out;
}
/* Only reset on passing, to avoid touching corrupted buffers */
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
+#ifdef CONFIG_TRACER_MAX_TRACE
if (type->use_max_tr) {
type->allocated_snapshot = false;
/* Shrink the max buffer again */
if (ring_buffer_expanded)
- ring_buffer_resize(max_tr.buffer, 1,
+ ring_buffer_resize(tr->max_buffer.buffer, 1,
RING_BUFFER_ALL_CPUS);
}
+#endif
printk(KERN_CONT "PASSED\n");
}
@@ -870,9 +863,9 @@ int register_tracer(struct tracer *type)
return ret;
}
-void tracing_reset(struct trace_array *tr, int cpu)
+void tracing_reset(struct trace_buffer *buf, int cpu)
{
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = buf->buffer;
if (!buffer)
return;
@@ -886,9 +879,9 @@ void tracing_reset(struct trace_array *tr, int cpu)
ring_buffer_record_enable(buffer);
}
-void tracing_reset_online_cpus(struct trace_array *tr)
+void tracing_reset_online_cpus(struct trace_buffer *buf)
{
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = buf->buffer;
int cpu;
if (!buffer)
@@ -899,7 +892,7 @@ void tracing_reset_online_cpus(struct trace_array *tr)
/* Make sure all commits have finished */
synchronize_sched();
- tr->time_start = ftrace_now(tr->cpu);
+ buf->time_start = ftrace_now(buf->cpu);
for_each_online_cpu(cpu)
ring_buffer_reset_cpu(buffer, cpu);
@@ -909,7 +902,7 @@ void tracing_reset_online_cpus(struct trace_array *tr)
void tracing_reset_current(int cpu)
{
- tracing_reset(&global_trace, cpu);
+ tracing_reset(&global_trace.trace_buffer, cpu);
}
void tracing_reset_all_online_cpus(void)
@@ -918,7 +911,10 @@ void tracing_reset_all_online_cpus(void)
mutex_lock(&trace_types_lock);
list_for_each_entry(tr, &ftrace_trace_arrays, list) {
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
+#ifdef CONFIG_TRACER_MAX_TRACE
+ tracing_reset_online_cpus(&tr->max_buffer);
+#endif
}
mutex_unlock(&trace_types_lock);
}
@@ -988,13 +984,15 @@ void tracing_start(void)
/* Prevent the buffers from switching */
arch_spin_lock(&ftrace_max_lock);
- buffer = global_trace.buffer;
+ buffer = global_trace.trace_buffer.buffer;
if (buffer)
ring_buffer_record_enable(buffer);
- buffer = max_tr.buffer;
+#ifdef CONFIG_TRACER_MAX_TRACE
+ buffer = global_trace.max_buffer.buffer;
if (buffer)
ring_buffer_record_enable(buffer);
+#endif
arch_spin_unlock(&ftrace_max_lock);
@@ -1026,7 +1024,7 @@ static void tracing_start_tr(struct trace_array *tr)
goto out;
}
- buffer = tr->buffer;
+ buffer = tr->trace_buffer.buffer;
if (buffer)
ring_buffer_record_enable(buffer);
@@ -1053,13 +1051,15 @@ void tracing_stop(void)
/* Prevent the buffers from switching */
arch_spin_lock(&ftrace_max_lock);
- buffer = global_trace.buffer;
+ buffer = global_trace.trace_buffer.buffer;
if (buffer)
ring_buffer_record_disable(buffer);
- buffer = max_tr.buffer;
+#ifdef CONFIG_TRACER_MAX_TRACE
+ buffer = global_trace.max_buffer.buffer;
if (buffer)
ring_buffer_record_disable(buffer);
+#endif
arch_spin_unlock(&ftrace_max_lock);
@@ -1080,7 +1080,7 @@ static void tracing_stop_tr(struct trace_array *tr)
if (tr->stop_count++)
goto out;
- buffer = tr->buffer;
+ buffer = tr->trace_buffer.buffer;
if (buffer)
ring_buffer_record_disable(buffer);
@@ -1246,7 +1246,7 @@ trace_event_buffer_lock_reserve(struct ring_buffer **current_rb,
int type, unsigned long len,
unsigned long flags, int pc)
{
- *current_rb = ftrace_file->tr->buffer;
+ *current_rb = ftrace_file->tr->trace_buffer.buffer;
return trace_buffer_lock_reserve(*current_rb,
type, len, flags, pc);
}
@@ -1257,7 +1257,7 @@ trace_current_buffer_lock_reserve(struct ring_buffer **current_rb,
int type, unsigned long len,
unsigned long flags, int pc)
{
- *current_rb = global_trace.buffer;
+ *current_rb = global_trace.trace_buffer.buffer;
return trace_buffer_lock_reserve(*current_rb,
type, len, flags, pc);
}
@@ -1296,7 +1296,7 @@ trace_function(struct trace_array *tr,
int pc)
{
struct ftrace_event_call *call = &event_function;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
struct ring_buffer_event *event;
struct ftrace_entry *entry;
@@ -1437,7 +1437,7 @@ void ftrace_trace_stack(struct ring_buffer *buffer, unsigned long flags,
void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
int pc)
{
- __ftrace_trace_stack(tr->buffer, flags, skip, pc, NULL);
+ __ftrace_trace_stack(tr->trace_buffer.buffer, flags, skip, pc, NULL);
}
/**
@@ -1453,7 +1453,8 @@ void trace_dump_stack(void)
local_save_flags(flags);
/* skipping 3 traces, seems to get us at the caller of this function */
- __ftrace_trace_stack(global_trace.buffer, flags, 3, preempt_count(), NULL);
+ __ftrace_trace_stack(global_trace.trace_buffer.buffer, flags, 3,
+ preempt_count(), NULL);
}
static DEFINE_PER_CPU(int, user_stack_count);
@@ -1623,7 +1624,7 @@ void trace_printk_init_buffers(void)
* directly here. If the global_trace.buffer is already
* allocated here, then this was called by module code.
*/
- if (global_trace.buffer)
+ if (global_trace.trace_buffer.buffer)
tracing_start_cmdline_record();
}
@@ -1683,7 +1684,7 @@ int trace_vbprintk(unsigned long ip, const char *fmt, va_list args)
local_save_flags(flags);
size = sizeof(*entry) + sizeof(u32) * len;
- buffer = tr->buffer;
+ buffer = tr->trace_buffer.buffer;
event = trace_buffer_lock_reserve(buffer, TRACE_BPRINT, size,
flags, pc);
if (!event)
@@ -1706,27 +1707,12 @@ out:
}
EXPORT_SYMBOL_GPL(trace_vbprintk);
-int trace_array_printk(struct trace_array *tr,
- unsigned long ip, const char *fmt, ...)
-{
- int ret;
- va_list ap;
-
- if (!(trace_flags & TRACE_ITER_PRINTK))
- return 0;
-
- va_start(ap, fmt);
- ret = trace_array_vprintk(tr, ip, fmt, ap);
- va_end(ap);
- return ret;
-}
-
-int trace_array_vprintk(struct trace_array *tr,
- unsigned long ip, const char *fmt, va_list args)
+static int
+__trace_array_vprintk(struct ring_buffer *buffer,
+ unsigned long ip, const char *fmt, va_list args)
{
struct ftrace_event_call *call = &event_print;
struct ring_buffer_event *event;
- struct ring_buffer *buffer;
int len = 0, size, pc;
struct print_entry *entry;
unsigned long flags;
@@ -1754,7 +1740,6 @@ int trace_array_vprintk(struct trace_array *tr,
local_save_flags(flags);
size = sizeof(*entry) + len + 1;
- buffer = tr->buffer;
event = trace_buffer_lock_reserve(buffer, TRACE_PRINT, size,
flags, pc);
if (!event)
@@ -1775,6 +1760,42 @@ int trace_array_vprintk(struct trace_array *tr,
return len;
}
+int trace_array_vprintk(struct trace_array *tr,
+ unsigned long ip, const char *fmt, va_list args)
+{
+ return __trace_array_vprintk(tr->trace_buffer.buffer, ip, fmt, args);
+}
+
+int trace_array_printk(struct trace_array *tr,
+ unsigned long ip, const char *fmt, ...)
+{
+ int ret;
+ va_list ap;
+
+ if (!(trace_flags & TRACE_ITER_PRINTK))
+ return 0;
+
+ va_start(ap, fmt);
+ ret = trace_array_vprintk(tr, ip, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+
+int trace_array_printk_buf(struct ring_buffer *buffer,
+ unsigned long ip, const char *fmt, ...)
+{
+ int ret;
+ va_list ap;
+
+ if (!(trace_flags & TRACE_ITER_PRINTK))
+ return 0;
+
+ va_start(ap, fmt);
+ ret = __trace_array_vprintk(buffer, ip, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+
int trace_vprintk(unsigned long ip, const char *fmt, va_list args)
{
return trace_array_vprintk(&global_trace, ip, fmt, args);
@@ -1800,7 +1821,7 @@ peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts,
if (buf_iter)
event = ring_buffer_iter_peek(buf_iter, ts);
else
- event = ring_buffer_peek(iter->tr->buffer, cpu, ts,
+ event = ring_buffer_peek(iter->trace_buffer->buffer, cpu, ts,
lost_events);
if (event) {
@@ -1815,7 +1836,7 @@ static struct trace_entry *
__find_next_entry(struct trace_iterator *iter, int *ent_cpu,
unsigned long *missing_events, u64 *ent_ts)
{
- struct ring_buffer *buffer = iter->tr->buffer;
+ struct ring_buffer *buffer = iter->trace_buffer->buffer;
struct trace_entry *ent, *next = NULL;
unsigned long lost_events = 0, next_lost = 0;
int cpu_file = iter->cpu_file;
@@ -1892,7 +1913,7 @@ void *trace_find_next_entry_inc(struct trace_iterator *iter)
static void trace_consume(struct trace_iterator *iter)
{
- ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts,
+ ring_buffer_consume(iter->trace_buffer->buffer, iter->cpu, &iter->ts,
&iter->lost_events);
}
@@ -1925,13 +1946,12 @@ static void *s_next(struct seq_file *m, void *v, loff_t *pos)
void tracing_iter_reset(struct trace_iterator *iter, int cpu)
{
- struct trace_array *tr = iter->tr;
struct ring_buffer_event *event;
struct ring_buffer_iter *buf_iter;
unsigned long entries = 0;
u64 ts;
- per_cpu_ptr(tr->data, cpu)->skipped_entries = 0;
+ per_cpu_ptr(iter->trace_buffer->data, cpu)->skipped_entries = 0;
buf_iter = trace_buffer_iter(iter, cpu);
if (!buf_iter)
@@ -1945,13 +1965,13 @@ void tracing_iter_reset(struct trace_iterator *iter, int cpu)
* by the timestamp being before the start of the buffer.
*/
while ((event = ring_buffer_iter_peek(buf_iter, &ts))) {
- if (ts >= iter->tr->time_start)
+ if (ts >= iter->trace_buffer->time_start)
break;
entries++;
ring_buffer_read(buf_iter, NULL);
}
- per_cpu_ptr(tr->data, cpu)->skipped_entries = entries;
+ per_cpu_ptr(iter->trace_buffer->data, cpu)->skipped_entries = entries;
}
/*
@@ -1978,8 +1998,10 @@ static void *s_start(struct seq_file *m, loff_t *pos)
*iter->trace = *tr->current_trace;
mutex_unlock(&trace_types_lock);
+#ifdef CONFIG_TRACER_MAX_TRACE
if (iter->snapshot && iter->trace->use_max_tr)
return ERR_PTR(-EBUSY);
+#endif
if (!iter->snapshot)
atomic_inc(&trace_record_cmdline_disabled);
@@ -2021,17 +2043,21 @@ static void s_stop(struct seq_file *m, void *p)
{
struct trace_iterator *iter = m->private;
+#ifdef CONFIG_TRACER_MAX_TRACE
if (iter->snapshot && iter->trace->use_max_tr)
return;
+#endif
if (!iter->snapshot)
atomic_dec(&trace_record_cmdline_disabled);
+
trace_access_unlock(iter->cpu_file);
trace_event_read_unlock();
}
static void
-get_total_entries(struct trace_array *tr, unsigned long *total, unsigned long *entries)
+get_total_entries(struct trace_buffer *buf,
+ unsigned long *total, unsigned long *entries)
{
unsigned long count;
int cpu;
@@ -2040,19 +2066,19 @@ get_total_entries(struct trace_array *tr, unsigned long *total, unsigned long *e
*entries = 0;
for_each_tracing_cpu(cpu) {
- count = ring_buffer_entries_cpu(tr->buffer, cpu);
+ count = ring_buffer_entries_cpu(buf->buffer, cpu);
/*
* If this buffer has skipped entries, then we hold all
* entries for the trace and we need to ignore the
* ones before the time stamp.
*/
- if (per_cpu_ptr(tr->data, cpu)->skipped_entries) {
- count -= per_cpu_ptr(tr->data, cpu)->skipped_entries;
+ if (per_cpu_ptr(buf->data, cpu)->skipped_entries) {
+ count -= per_cpu_ptr(buf->data, cpu)->skipped_entries;
/* total is the same as the entries */
*total += count;
} else
*total += count +
- ring_buffer_overrun_cpu(tr->buffer, cpu);
+ ring_buffer_overrun_cpu(buf->buffer, cpu);
*entries += count;
}
}
@@ -2069,27 +2095,27 @@ static void print_lat_help_header(struct seq_file *m)
seq_puts(m, "# \\ / ||||| \\ | / \n");
}
-static void print_event_info(struct trace_array *tr, struct seq_file *m)
+static void print_event_info(struct trace_buffer *buf, struct seq_file *m)
{
unsigned long total;
unsigned long entries;
- get_total_entries(tr, &total, &entries);
+ get_total_entries(buf, &total, &entries);
seq_printf(m, "# entries-in-buffer/entries-written: %lu/%lu #P:%d\n",
entries, total, num_online_cpus());
seq_puts(m, "#\n");
}
-static void print_func_help_header(struct trace_array *tr, struct seq_file *m)
+static void print_func_help_header(struct trace_buffer *buf, struct seq_file *m)
{
- print_event_info(tr, m);
+ print_event_info(buf, m);
seq_puts(m, "# TASK-PID CPU# TIMESTAMP FUNCTION\n");
seq_puts(m, "# | | | | |\n");
}
-static void print_func_help_header_irq(struct trace_array *tr, struct seq_file *m)
+static void print_func_help_header_irq(struct trace_buffer *buf, struct seq_file *m)
{
- print_event_info(tr, m);
+ print_event_info(buf, m);
seq_puts(m, "# _-----=> irqs-off\n");
seq_puts(m, "# / _----=> need-resched\n");
seq_puts(m, "# | / _---=> hardirq/softirq\n");
@@ -2103,8 +2129,8 @@ void
print_trace_header(struct seq_file *m, struct trace_iterator *iter)
{
unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
- struct trace_array *tr = iter->tr;
- struct trace_array_cpu *data = per_cpu_ptr(tr->data, tr->cpu);
+ struct trace_buffer *buf = iter->trace_buffer;
+ struct trace_array_cpu *data = per_cpu_ptr(buf->data, buf->cpu);
struct tracer *type = iter->trace;
unsigned long entries;
unsigned long total;
@@ -2112,7 +2138,7 @@ print_trace_header(struct seq_file *m, struct trace_iterator *iter)
name = type->name;
- get_total_entries(tr, &total, &entries);
+ get_total_entries(buf, &total, &entries);
seq_printf(m, "# %s latency trace v1.1.5 on %s\n",
name, UTS_RELEASE);
@@ -2123,7 +2149,7 @@ print_trace_header(struct seq_file *m, struct trace_iterator *iter)
nsecs_to_usecs(data->saved_latency),
entries,
total,
- tr->cpu,
+ buf->cpu,
#if defined(CONFIG_PREEMPT_NONE)
"server",
#elif defined(CONFIG_PREEMPT_VOLUNTARY)
@@ -2174,7 +2200,7 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
if (cpumask_test_cpu(iter->cpu, iter->started))
return;
- if (per_cpu_ptr(iter->tr->data, iter->cpu)->skipped_entries)
+ if (per_cpu_ptr(iter->trace_buffer->data, iter->cpu)->skipped_entries)
return;
cpumask_set_cpu(iter->cpu, iter->started);
@@ -2304,7 +2330,7 @@ int trace_empty(struct trace_iterator *iter)
if (!ring_buffer_iter_empty(buf_iter))
return 0;
} else {
- if (!ring_buffer_empty_cpu(iter->tr->buffer, cpu))
+ if (!ring_buffer_empty_cpu(iter->trace_buffer->buffer, cpu))
return 0;
}
return 1;
@@ -2316,7 +2342,7 @@ int trace_empty(struct trace_iterator *iter)
if (!ring_buffer_iter_empty(buf_iter))
return 0;
} else {
- if (!ring_buffer_empty_cpu(iter->tr->buffer, cpu))
+ if (!ring_buffer_empty_cpu(iter->trace_buffer->buffer, cpu))
return 0;
}
}
@@ -2394,9 +2420,9 @@ void trace_default_header(struct seq_file *m)
} else {
if (!(trace_flags & TRACE_ITER_VERBOSE)) {
if (trace_flags & TRACE_ITER_IRQ_INFO)
- print_func_help_header_irq(iter->tr, m);
+ print_func_help_header_irq(iter->trace_buffer, m);
else
- print_func_help_header(iter->tr, m);
+ print_func_help_header(iter->trace_buffer, m);
}
}
}
@@ -2515,11 +2541,15 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
if (!zalloc_cpumask_var(&iter->started, GFP_KERNEL))
goto fail;
+ iter->tr = tr;
+
+#ifdef CONFIG_TRACER_MAX_TRACE
/* Currently only the top directory has a snapshot */
if (tr->current_trace->print_max || snapshot)
- iter->tr = &max_tr;
+ iter->trace_buffer = &tr->max_buffer;
else
- iter->tr = tr;
+#endif
+ iter->trace_buffer = &tr->trace_buffer;
iter->snapshot = snapshot;
iter->pos = -1;
mutex_init(&iter->mutex);
@@ -2530,7 +2560,7 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
iter->trace->open(iter);
/* Annotate start of buffers if we had overruns */
- if (ring_buffer_overruns(iter->tr->buffer))
+ if (ring_buffer_overruns(iter->trace_buffer->buffer))
iter->iter_flags |= TRACE_FILE_ANNOTATE;
/* Output in nanoseconds only if we are using a clock in nanoseconds. */
@@ -2544,7 +2574,7 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
if (iter->cpu_file == RING_BUFFER_ALL_CPUS) {
for_each_tracing_cpu(cpu) {
iter->buffer_iter[cpu] =
- ring_buffer_read_prepare(iter->tr->buffer, cpu);
+ ring_buffer_read_prepare(iter->trace_buffer->buffer, cpu);
}
ring_buffer_read_prepare_sync();
for_each_tracing_cpu(cpu) {
@@ -2554,7 +2584,7 @@ __tracing_open(struct inode *inode, struct file *file, bool snapshot)
} else {
cpu = iter->cpu_file;
iter->buffer_iter[cpu] =
- ring_buffer_read_prepare(iter->tr->buffer, cpu);
+ ring_buffer_read_prepare(iter->trace_buffer->buffer, cpu);
ring_buffer_read_prepare_sync();
ring_buffer_read_start(iter->buffer_iter[cpu]);
tracing_iter_reset(iter, cpu);
@@ -2593,12 +2623,7 @@ static int tracing_release(struct inode *inode, struct file *file)
return 0;
iter = m->private;
-
- /* Only the global tracer has a matching max_tr */
- if (iter->tr == &max_tr)
- tr = &global_trace;
- else
- tr = iter->tr;
+ tr = iter->tr;
mutex_lock(&trace_types_lock);
for_each_tracing_cpu(cpu) {
@@ -2634,9 +2659,9 @@ static int tracing_open(struct inode *inode, struct file *file)
struct trace_array *tr = tc->tr;
if (tc->cpu == RING_BUFFER_ALL_CPUS)
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
else
- tracing_reset(tr, tc->cpu);
+ tracing_reset(&tr->trace_buffer, tc->cpu);
}
if (file->f_mode & FMODE_READ) {
@@ -2805,13 +2830,13 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
*/
if (cpumask_test_cpu(cpu, tracing_cpumask) &&
!cpumask_test_cpu(cpu, tracing_cpumask_new)) {
- atomic_inc(&per_cpu_ptr(tr->data, cpu)->disabled);
- ring_buffer_record_disable_cpu(tr->buffer, cpu);
+ atomic_inc(&per_cpu_ptr(tr->trace_buffer.data, cpu)->disabled);
+ ring_buffer_record_disable_cpu(tr->trace_buffer.buffer, cpu);
}
if (!cpumask_test_cpu(cpu, tracing_cpumask) &&
cpumask_test_cpu(cpu, tracing_cpumask_new)) {
- atomic_dec(&per_cpu_ptr(tr->data, cpu)->disabled);
- ring_buffer_record_enable_cpu(tr->buffer, cpu);
+ atomic_dec(&per_cpu_ptr(tr->trace_buffer.data, cpu)->disabled);
+ ring_buffer_record_enable_cpu(tr->trace_buffer.buffer, cpu);
}
}
arch_spin_unlock(&ftrace_max_lock);
@@ -2930,9 +2955,9 @@ int set_tracer_flag(struct trace_array *tr, unsigned int mask, int enabled)
trace_event_enable_cmd_record(enabled);
if (mask == TRACE_ITER_OVERWRITE) {
- ring_buffer_change_overwrite(global_trace.buffer, enabled);
+ ring_buffer_change_overwrite(tr->trace_buffer.buffer, enabled);
#ifdef CONFIG_TRACER_MAX_TRACE
- ring_buffer_change_overwrite(max_tr.buffer, enabled);
+ ring_buffer_change_overwrite(tr->max_buffer.buffer, enabled);
#endif
}
@@ -3116,42 +3141,44 @@ tracing_set_trace_read(struct file *filp, char __user *ubuf,
int tracer_init(struct tracer *t, struct trace_array *tr)
{
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
return t->init(tr);
}
-static void set_buffer_entries(struct trace_array *tr, unsigned long val)
+static void set_buffer_entries(struct trace_buffer *buf, unsigned long val)
{
int cpu;
for_each_tracing_cpu(cpu)
- per_cpu_ptr(tr->data, cpu)->entries = val;
+ per_cpu_ptr(buf->data, cpu)->entries = val;
}
+#ifdef CONFIG_TRACER_MAX_TRACE
/* resize @tr's buffer to the size of @size_tr's entries */
-static int resize_buffer_duplicate_size(struct trace_array *tr,
- struct trace_array *size_tr, int cpu_id)
+static int resize_buffer_duplicate_size(struct trace_buffer *trace_buf,
+ struct trace_buffer *size_buf, int cpu_id)
{
int cpu, ret = 0;
if (cpu_id == RING_BUFFER_ALL_CPUS) {
for_each_tracing_cpu(cpu) {
- ret = ring_buffer_resize(tr->buffer,
- per_cpu_ptr(size_tr->data, cpu)->entries, cpu);
+ ret = ring_buffer_resize(trace_buf->buffer,
+ per_cpu_ptr(size_buf->data, cpu)->entries, cpu);
if (ret < 0)
break;
- per_cpu_ptr(tr->data, cpu)->entries =
- per_cpu_ptr(size_tr->data, cpu)->entries;
+ per_cpu_ptr(trace_buf->data, cpu)->entries =
+ per_cpu_ptr(size_buf->data, cpu)->entries;
}
} else {
- ret = ring_buffer_resize(tr->buffer,
- per_cpu_ptr(size_tr->data, cpu_id)->entries, cpu_id);
+ ret = ring_buffer_resize(trace_buf->buffer,
+ per_cpu_ptr(size_buf->data, cpu_id)->entries, cpu_id);
if (ret == 0)
- per_cpu_ptr(tr->data, cpu_id)->entries =
- per_cpu_ptr(size_tr->data, cpu_id)->entries;
+ per_cpu_ptr(trace_buf->data, cpu_id)->entries =
+ per_cpu_ptr(size_buf->data, cpu_id)->entries;
}
return ret;
}
+#endif /* CONFIG_TRACER_MAX_TRACE */
static int __tracing_resize_ring_buffer(struct trace_array *tr,
unsigned long size, int cpu)
@@ -3166,20 +3193,22 @@ static int __tracing_resize_ring_buffer(struct trace_array *tr,
ring_buffer_expanded = 1;
/* May be called before buffers are initialized */
- if (!tr->buffer)
+ if (!tr->trace_buffer.buffer)
return 0;
- ret = ring_buffer_resize(tr->buffer, size, cpu);
+ ret = ring_buffer_resize(tr->trace_buffer.buffer, size, cpu);
if (ret < 0)
return ret;
+#ifdef CONFIG_TRACER_MAX_TRACE
if (!(tr->flags & TRACE_ARRAY_FL_GLOBAL) ||
!tr->current_trace->use_max_tr)
goto out;
- ret = ring_buffer_resize(max_tr.buffer, size, cpu);
+ ret = ring_buffer_resize(tr->max_buffer.buffer, size, cpu);
if (ret < 0) {
- int r = resize_buffer_duplicate_size(tr, tr, cpu);
+ int r = resize_buffer_duplicate_size(&tr->trace_buffer,
+ &tr->trace_buffer, cpu);
if (r < 0) {
/*
* AARGH! We are left with different
@@ -3202,15 +3231,17 @@ static int __tracing_resize_ring_buffer(struct trace_array *tr,
}
if (cpu == RING_BUFFER_ALL_CPUS)
- set_buffer_entries(&max_tr, size);
+ set_buffer_entries(&tr->max_buffer, size);
else
- per_cpu_ptr(max_tr.data, cpu)->entries = size;
+ per_cpu_ptr(tr->max_buffer.data, cpu)->entries = size;
out:
+#endif /* CONFIG_TRACER_MAX_TRACE */
+
if (cpu == RING_BUFFER_ALL_CPUS)
- set_buffer_entries(tr, size);
+ set_buffer_entries(&tr->trace_buffer, size);
else
- per_cpu_ptr(tr->data, cpu)->entries = size;
+ per_cpu_ptr(tr->trace_buffer.data, cpu)->entries = size;
return ret;
}
@@ -3277,7 +3308,9 @@ static int tracing_set_tracer(const char *buf)
static struct trace_option_dentry *topts;
struct trace_array *tr = &global_trace;
struct tracer *t;
+#ifdef CONFIG_TRACER_MAX_TRACE
bool had_max_tr;
+#endif
int ret = 0;
mutex_lock(&trace_types_lock);
@@ -3308,7 +3341,10 @@ static int tracing_set_tracer(const char *buf)
if (tr->current_trace->reset)
tr->current_trace->reset(tr);
+#ifdef CONFIG_TRACER_MAX_TRACE
had_max_tr = tr->current_trace->allocated_snapshot;
+
+ /* Current trace needs to be nop_trace before synchronize_sched */
tr->current_trace = &nop_trace;
if (had_max_tr && !t->use_max_tr) {
@@ -3325,22 +3361,28 @@ static int tracing_set_tracer(const char *buf)
* The max_tr ring buffer has some state (e.g. ring->clock) and
* we want preserve it.
*/
- ring_buffer_resize(max_tr.buffer, 1, RING_BUFFER_ALL_CPUS);
- set_buffer_entries(&max_tr, 1);
- tracing_reset_online_cpus(&max_tr);
+ ring_buffer_resize(tr->max_buffer.buffer, 1, RING_BUFFER_ALL_CPUS);
+ set_buffer_entries(&tr->max_buffer, 1);
+ tracing_reset_online_cpus(&tr->max_buffer);
tr->current_trace->allocated_snapshot = false;
}
+#else
+ tr->current_trace = &nop_trace;
+#endif
destroy_trace_option_files(topts);
topts = create_trace_option_files(tr, t);
+
+#ifdef CONFIG_TRACER_MAX_TRACE
if (t->use_max_tr && !had_max_tr) {
/* we need to make per cpu buffer sizes equivalent */
- ret = resize_buffer_duplicate_size(&max_tr, &global_trace,
+ ret = resize_buffer_duplicate_size(&tr->max_buffer, &tr->trace_buffer,
RING_BUFFER_ALL_CPUS);
if (ret < 0)
goto out;
t->allocated_snapshot = true;
}
+#endif
if (t->init) {
ret = tracer_init(t, tr);
@@ -3468,6 +3510,7 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp)
iter->cpu_file = tc->cpu;
iter->tr = tc->tr;
+ iter->trace_buffer = &tc->tr->trace_buffer;
mutex_init(&iter->mutex);
filp->private_data = iter;
@@ -3518,7 +3561,7 @@ trace_poll(struct trace_iterator *iter, struct file *filp, poll_table *poll_tabl
*/
return POLLIN | POLLRDNORM;
else
- return ring_buffer_poll_wait(iter->tr->buffer, iter->cpu_file,
+ return ring_buffer_poll_wait(iter->trace_buffer->buffer, iter->cpu_file,
filp, poll_table);
}
@@ -3857,8 +3900,8 @@ tracing_entries_read(struct file *filp, char __user *ubuf,
for_each_tracing_cpu(cpu) {
/* fill in the size from first enabled cpu */
if (size == 0)
- size = per_cpu_ptr(tr->data, cpu)->entries;
- if (size != per_cpu_ptr(tr->data, cpu)->entries) {
+ size = per_cpu_ptr(tr->trace_buffer.data, cpu)->entries;
+ if (size != per_cpu_ptr(tr->trace_buffer.data, cpu)->entries) {
buf_size_same = 0;
break;
}
@@ -3874,7 +3917,7 @@ tracing_entries_read(struct file *filp, char __user *ubuf,
} else
r = sprintf(buf, "X\n");
} else
- r = sprintf(buf, "%lu\n", per_cpu_ptr(tr->data, tc->cpu)->entries >> 10);
+ r = sprintf(buf, "%lu\n", per_cpu_ptr(tr->trace_buffer.data, tc->cpu)->entries >> 10);
mutex_unlock(&trace_types_lock);
@@ -3921,7 +3964,7 @@ tracing_total_entries_read(struct file *filp, char __user *ubuf,
mutex_lock(&trace_types_lock);
for_each_tracing_cpu(cpu) {
- size += per_cpu_ptr(tr->data, cpu)->entries >> 10;
+ size += per_cpu_ptr(tr->trace_buffer.data, cpu)->entries >> 10;
if (!ring_buffer_expanded)
expanded_size += trace_buf_size >> 10;
}
@@ -4026,7 +4069,7 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
local_save_flags(irq_flags);
size = sizeof(*entry) + cnt + 2; /* possible \n added */
- buffer = global_trace.buffer;
+ buffer = global_trace.trace_buffer.buffer;
event = trace_buffer_lock_reserve(buffer, TRACE_PRINT, size,
irq_flags, preempt_count());
if (!event) {
@@ -4111,16 +4154,19 @@ static ssize_t tracing_clock_write(struct file *filp, const char __user *ubuf,
tr->clock_id = i;
- ring_buffer_set_clock(tr->buffer, trace_clocks[i].func);
- if (tr->flags & TRACE_ARRAY_FL_GLOBAL && max_tr.buffer)
- ring_buffer_set_clock(max_tr.buffer, trace_clocks[i].func);
+ ring_buffer_set_clock(tr->trace_buffer.buffer, trace_clocks[i].func);
/*
* New clock may not be consistent with the previous clock.
* Reset the buffer so that it doesn't have incomparable timestamps.
*/
- tracing_reset_online_cpus(&global_trace);
- tracing_reset_online_cpus(&max_tr);
+ tracing_reset_online_cpus(&global_trace.trace_buffer);
+
+#ifdef CONFIG_TRACER_MAX_TRACE
+ if (tr->flags & TRACE_ARRAY_FL_GLOBAL && tr->max_buffer.buffer)
+ ring_buffer_set_clock(tr->max_buffer.buffer, trace_clocks[i].func);
+ tracing_reset_online_cpus(&global_trace.max_buffer);
+#endif
mutex_unlock(&trace_types_lock);
@@ -4160,6 +4206,7 @@ static int tracing_snapshot_open(struct inode *inode, struct file *file)
return -ENOMEM;
}
iter->tr = tc->tr;
+ iter->trace_buffer = &tc->tr->max_buffer;
m->private = iter;
file->private_data = m;
}
@@ -4196,18 +4243,18 @@ tracing_snapshot_write(struct file *filp, const char __user *ubuf, size_t cnt,
case 0:
if (tr->current_trace->allocated_snapshot) {
/* free spare buffer */
- ring_buffer_resize(max_tr.buffer, 1,
+ ring_buffer_resize(tr->max_buffer.buffer, 1,
RING_BUFFER_ALL_CPUS);
- set_buffer_entries(&max_tr, 1);
- tracing_reset_online_cpus(&max_tr);
+ set_buffer_entries(&tr->max_buffer, 1);
+ tracing_reset_online_cpus(&tr->max_buffer);
tr->current_trace->allocated_snapshot = false;
}
break;
case 1:
if (!tr->current_trace->allocated_snapshot) {
/* allocate spare buffer */
- ret = resize_buffer_duplicate_size(&max_tr,
- &global_trace, RING_BUFFER_ALL_CPUS);
+ ret = resize_buffer_duplicate_size(&tr->max_buffer,
+ &tr->trace_buffer, RING_BUFFER_ALL_CPUS);
if (ret < 0)
break;
tr->current_trace->allocated_snapshot = true;
@@ -4220,7 +4267,7 @@ tracing_snapshot_write(struct file *filp, const char __user *ubuf, size_t cnt,
break;
default:
if (tr->current_trace->allocated_snapshot)
- tracing_reset_online_cpus(&max_tr);
+ tracing_reset_online_cpus(&tr->max_buffer);
break;
}
@@ -4338,6 +4385,7 @@ static int tracing_buffers_open(struct inode *inode, struct file *filp)
info->iter.tr = tr;
info->iter.cpu_file = tc->cpu;
info->iter.trace = tr->current_trace;
+ info->iter.trace_buffer = &tr->trace_buffer;
info->spare = NULL;
/* Force reading ring buffer for first read */
info->read = (unsigned int)-1;
@@ -4369,7 +4417,8 @@ tracing_buffers_read(struct file *filp, char __user *ubuf,
return 0;
if (!info->spare)
- info->spare = ring_buffer_alloc_read_page(iter->tr->buffer, iter->cpu_file);
+ info->spare = ring_buffer_alloc_read_page(iter->trace_buffer->buffer,
+ iter->cpu_file);
if (!info->spare)
return -ENOMEM;
@@ -4379,7 +4428,7 @@ tracing_buffers_read(struct file *filp, char __user *ubuf,
again:
trace_access_lock(iter->cpu_file);
- ret = ring_buffer_read_page(iter->tr->buffer,
+ ret = ring_buffer_read_page(iter->trace_buffer->buffer,
&info->spare,
count,
iter->cpu_file, 0);
@@ -4421,7 +4470,7 @@ static int tracing_buffers_release(struct inode *inode, struct file *file)
struct trace_iterator *iter = &info->iter;
if (info->spare)
- ring_buffer_free_read_page(iter->tr->buffer, info->spare);
+ ring_buffer_free_read_page(iter->trace_buffer->buffer, info->spare);
kfree(info);
return 0;
@@ -4521,7 +4570,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
again:
trace_access_lock(iter->cpu_file);
- entries = ring_buffer_entries_cpu(iter->tr->buffer, iter->cpu_file);
+ entries = ring_buffer_entries_cpu(iter->trace_buffer->buffer, iter->cpu_file);
for (i = 0; i < pipe->buffers && len && entries; i++, len -= PAGE_SIZE) {
struct page *page;
@@ -4532,7 +4581,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
break;
ref->ref = 1;
- ref->buffer = iter->tr->buffer;
+ ref->buffer = iter->trace_buffer->buffer;
ref->page = ring_buffer_alloc_read_page(ref->buffer, iter->cpu_file);
if (!ref->page) {
kfree(ref);
@@ -4564,7 +4613,7 @@ tracing_buffers_splice_read(struct file *file, loff_t *ppos,
spd.nr_pages++;
*ppos += PAGE_SIZE;
- entries = ring_buffer_entries_cpu(iter->tr->buffer, iter->cpu_file);
+ entries = ring_buffer_entries_cpu(iter->trace_buffer->buffer, iter->cpu_file);
}
trace_access_unlock(iter->cpu_file);
@@ -4605,6 +4654,7 @@ tracing_stats_read(struct file *filp, char __user *ubuf,
{
struct trace_cpu *tc = filp->private_data;
struct trace_array *tr = tc->tr;
+ struct trace_buffer *trace_buf = &tr->trace_buffer;
struct trace_seq *s;
unsigned long cnt;
unsigned long long t;
@@ -4617,41 +4667,41 @@ tracing_stats_read(struct file *filp, char __user *ubuf,
trace_seq_init(s);
- cnt = ring_buffer_entries_cpu(tr->buffer, cpu);
+ cnt = ring_buffer_entries_cpu(trace_buf->buffer, cpu);
trace_seq_printf(s, "entries: %ld\n", cnt);
- cnt = ring_buffer_overrun_cpu(tr->buffer, cpu);
+ cnt = ring_buffer_overrun_cpu(trace_buf->buffer, cpu);
trace_seq_printf(s, "overrun: %ld\n", cnt);
- cnt = ring_buffer_commit_overrun_cpu(tr->buffer, cpu);
+ cnt = ring_buffer_commit_overrun_cpu(trace_buf->buffer, cpu);
trace_seq_printf(s, "commit overrun: %ld\n", cnt);
- cnt = ring_buffer_bytes_cpu(tr->buffer, cpu);
+ cnt = ring_buffer_bytes_cpu(trace_buf->buffer, cpu);
trace_seq_printf(s, "bytes: %ld\n", cnt);
if (trace_clocks[trace_clock_id].in_ns) {
/* local or global for trace_clock */
- t = ns2usecs(ring_buffer_oldest_event_ts(tr->buffer, cpu));
+ t = ns2usecs(ring_buffer_oldest_event_ts(trace_buf->buffer, cpu));
usec_rem = do_div(t, USEC_PER_SEC);
trace_seq_printf(s, "oldest event ts: %5llu.%06lu\n",
t, usec_rem);
- t = ns2usecs(ring_buffer_time_stamp(tr->buffer, cpu));
+ t = ns2usecs(ring_buffer_time_stamp(trace_buf->buffer, cpu));
usec_rem = do_div(t, USEC_PER_SEC);
trace_seq_printf(s, "now ts: %5llu.%06lu\n", t, usec_rem);
} else {
/* counter or tsc mode for trace_clock */
trace_seq_printf(s, "oldest event ts: %llu\n",
- ring_buffer_oldest_event_ts(tr->buffer, cpu));
+ ring_buffer_oldest_event_ts(trace_buf->buffer, cpu));
trace_seq_printf(s, "now ts: %llu\n",
- ring_buffer_time_stamp(tr->buffer, cpu));
+ ring_buffer_time_stamp(trace_buf->buffer, cpu));
}
- cnt = ring_buffer_dropped_events_cpu(tr->buffer, cpu);
+ cnt = ring_buffer_dropped_events_cpu(trace_buf->buffer, cpu);
trace_seq_printf(s, "dropped events: %ld\n", cnt);
- cnt = ring_buffer_read_events_cpu(tr->buffer, cpu);
+ cnt = ring_buffer_read_events_cpu(trace_buf->buffer, cpu);
trace_seq_printf(s, "read events: %ld\n", cnt);
count = simple_read_from_buffer(ubuf, count, ppos, s->buffer, s->len);
@@ -4754,7 +4804,7 @@ static struct dentry *tracing_dentry_percpu(struct trace_array *tr, int cpu)
static void
tracing_init_debugfs_percpu(struct trace_array *tr, long cpu)
{
- struct trace_array_cpu *data = per_cpu_ptr(tr->data, cpu);
+ struct trace_array_cpu *data = per_cpu_ptr(tr->trace_buffer.data, cpu);
struct dentry *d_percpu = tracing_dentry_percpu(tr, cpu);
struct dentry *d_cpu;
char cpu_dir[30]; /* 30 characters should be more than enough */
@@ -5038,7 +5088,7 @@ rb_simple_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct trace_array *tr = filp->private_data;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
char buf[64];
int r;
@@ -5057,7 +5107,7 @@ rb_simple_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct trace_array *tr = filp->private_data;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
unsigned long val;
int ret;
@@ -5129,18 +5179,18 @@ static int new_instance_create(const char *name)
rb_flags = trace_flags & TRACE_ITER_OVERWRITE ? RB_FL_OVERWRITE : 0;
- tr->buffer = ring_buffer_alloc(trace_buf_size, rb_flags);
- if (!tr->buffer)
+ tr->trace_buffer.buffer = ring_buffer_alloc(trace_buf_size, rb_flags);
+ if (!tr->trace_buffer.buffer)
goto out_free_tr;
- tr->data = alloc_percpu(struct trace_array_cpu);
- if (!tr->data)
+ tr->trace_buffer.data = alloc_percpu(struct trace_array_cpu);
+ if (!tr->trace_buffer.data)
goto out_free_tr;
for_each_tracing_cpu(i) {
- memset(per_cpu_ptr(tr->data, i), 0, sizeof(struct trace_array_cpu));
- per_cpu_ptr(tr->data, i)->trace_cpu.cpu = i;
- per_cpu_ptr(tr->data, i)->trace_cpu.tr = tr;
+ memset(per_cpu_ptr(tr->trace_buffer.data, i), 0, sizeof(struct trace_array_cpu));
+ per_cpu_ptr(tr->trace_buffer.data, i)->trace_cpu.cpu = i;
+ per_cpu_ptr(tr->trace_buffer.data, i)->trace_cpu.tr = tr;
}
/* Holder for file callbacks */
@@ -5164,8 +5214,8 @@ static int new_instance_create(const char *name)
return 0;
out_free_tr:
- if (tr->buffer)
- ring_buffer_free(tr->buffer);
+ if (tr->trace_buffer.buffer)
+ ring_buffer_free(tr->trace_buffer.buffer);
kfree(tr->name);
kfree(tr);
@@ -5198,8 +5248,8 @@ static int instance_delete(const char *name)
event_trace_del_tracer(tr);
debugfs_remove_recursive(tr->dir);
- free_percpu(tr->data);
- ring_buffer_free(tr->buffer);
+ free_percpu(tr->trace_buffer.data);
+ ring_buffer_free(tr->trace_buffer.buffer);
kfree(tr->name);
kfree(tr);
@@ -5439,6 +5489,7 @@ void trace_init_global_iter(struct trace_iterator *iter)
iter->tr = &global_trace;
iter->trace = iter->tr->current_trace;
iter->cpu_file = RING_BUFFER_ALL_CPUS;
+ iter->trace_buffer = &global_trace.trace_buffer;
}
static void
@@ -5476,7 +5527,7 @@ __ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode)
trace_init_global_iter(&iter);
for_each_tracing_cpu(cpu) {
- atomic_inc(&per_cpu_ptr(iter.tr->data, cpu)->disabled);
+ atomic_inc(&per_cpu_ptr(iter.tr->trace_buffer.data, cpu)->disabled);
}
old_userobj = trace_flags & TRACE_ITER_SYM_USEROBJ;
@@ -5544,7 +5595,7 @@ __ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode)
trace_flags |= old_userobj;
for_each_tracing_cpu(cpu) {
- atomic_dec(&per_cpu_ptr(iter.tr->data, cpu)->disabled);
+ atomic_dec(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
}
tracing_on();
}
@@ -5594,58 +5645,59 @@ __init static int tracer_alloc_buffers(void)
raw_spin_lock_init(&global_trace.start_lock);
/* TODO: make the number of buffers hot pluggable with CPUS */
- global_trace.buffer = ring_buffer_alloc(ring_buf_size, rb_flags);
- if (!global_trace.buffer) {
+ global_trace.trace_buffer.buffer = ring_buffer_alloc(ring_buf_size, rb_flags);
+ if (!global_trace.trace_buffer.buffer) {
printk(KERN_ERR "tracer: failed to allocate ring buffer!\n");
WARN_ON(1);
goto out_free_cpumask;
}
- global_trace.data = alloc_percpu(struct trace_array_cpu);
+ global_trace.trace_buffer.data = alloc_percpu(struct trace_array_cpu);
- if (!global_trace.data) {
+ if (!global_trace.trace_buffer.data) {
printk(KERN_ERR "tracer: failed to allocate percpu memory!\n");
WARN_ON(1);
goto out_free_cpumask;
}
for_each_tracing_cpu(i) {
- memset(per_cpu_ptr(global_trace.data, i), 0, sizeof(struct trace_array_cpu));
- per_cpu_ptr(global_trace.data, i)->trace_cpu.cpu = i;
- per_cpu_ptr(global_trace.data, i)->trace_cpu.tr = &global_trace;
+ memset(per_cpu_ptr(global_trace.trace_buffer.data, i), 0,
+ sizeof(struct trace_array_cpu));
+ per_cpu_ptr(global_trace.trace_buffer.data, i)->trace_cpu.cpu = i;
+ per_cpu_ptr(global_trace.trace_buffer.data, i)->trace_cpu.tr = &global_trace;
}
if (global_trace.buffer_disabled)
tracing_off();
#ifdef CONFIG_TRACER_MAX_TRACE
- max_tr.data = alloc_percpu(struct trace_array_cpu);
- if (!max_tr.data) {
+ global_trace.max_buffer.data = alloc_percpu(struct trace_array_cpu);
+ if (!global_trace.max_buffer.data) {
printk(KERN_ERR "tracer: failed to allocate percpu memory!\n");
WARN_ON(1);
goto out_free_cpumask;
}
- max_tr.buffer = ring_buffer_alloc(1, rb_flags);
- raw_spin_lock_init(&max_tr.start_lock);
- if (!max_tr.buffer) {
+ global_trace.max_buffer.buffer = ring_buffer_alloc(1, rb_flags);
+ if (!global_trace.max_buffer.buffer) {
printk(KERN_ERR "tracer: failed to allocate max ring buffer!\n");
WARN_ON(1);
- ring_buffer_free(global_trace.buffer);
+ ring_buffer_free(global_trace.trace_buffer.buffer);
goto out_free_cpumask;
}
for_each_tracing_cpu(i) {
- memset(per_cpu_ptr(max_tr.data, i), 0, sizeof(struct trace_array_cpu));
- per_cpu_ptr(max_tr.data, i)->trace_cpu.cpu = i;
- per_cpu_ptr(max_tr.data, i)->trace_cpu.tr = &max_tr;
+ memset(per_cpu_ptr(global_trace.max_buffer.data, i), 0,
+ sizeof(struct trace_array_cpu));
+ per_cpu_ptr(global_trace.max_buffer.data, i)->trace_cpu.cpu = i;
+ per_cpu_ptr(global_trace.max_buffer.data, i)->trace_cpu.tr = &global_trace;
}
#endif
/* Allocate the first page for all buffers */
- set_buffer_entries(&global_trace,
- ring_buffer_size(global_trace.buffer, 0));
+ set_buffer_entries(&global_trace.trace_buffer,
+ ring_buffer_size(global_trace.trace_buffer.buffer, 0));
#ifdef CONFIG_TRACER_MAX_TRACE
- set_buffer_entries(&max_tr, 1);
+ set_buffer_entries(&global_trace.max_buffer, 1);
#endif
trace_init_cmdlines();
@@ -5682,8 +5734,10 @@ __init static int tracer_alloc_buffers(void)
return 0;
out_free_cpumask:
- free_percpu(global_trace.data);
- free_percpu(max_tr.data);
+ free_percpu(global_trace.trace_buffer.data);
+#ifdef CONFIG_TRACER_MAX_TRACE
+ free_percpu(global_trace.max_buffer.data);
+#endif
free_cpumask_var(tracing_cpumask);
out_free_buffer_mask:
free_cpumask_var(tracing_buffer_mask);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index fa60b2977524..986834f1f4dd 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -167,16 +167,37 @@ struct trace_array_cpu {
struct tracer;
+struct trace_buffer {
+ struct trace_array *tr;
+ struct ring_buffer *buffer;
+ struct trace_array_cpu __percpu *data;
+ cycle_t time_start;
+ int cpu;
+};
+
/*
* The trace array - an array of per-CPU trace arrays. This is the
* highest level data structure that individual tracers deal with.
* They have on/off state as well:
*/
struct trace_array {
- struct ring_buffer *buffer;
struct list_head list;
char *name;
- int cpu;
+ struct trace_buffer trace_buffer;
+#ifdef CONFIG_TRACER_MAX_TRACE
+ /*
+ * The max_buffer is used to snapshot the trace when a maximum
+ * latency is reached, or when the user initiates a snapshot.
+ * Some tracers will use this to store a maximum trace while
+ * it continues examining live traces.
+ *
+ * The buffers for the max_buffer are set up the same as the trace_buffer
+ * When a snapshot is taken, the buffer of the max_buffer is swapped
+ * with the buffer of the trace_buffer and the buffers are reset for
+ * the trace_buffer so the tracing can continue.
+ */
+ struct trace_buffer max_buffer;
+#endif
int buffer_disabled;
struct trace_cpu trace_cpu; /* place holder */
#ifdef CONFIG_FTRACE_SYSCALLS
@@ -189,7 +210,6 @@ struct trace_array {
int clock_id;
struct tracer *current_trace;
unsigned int flags;
- cycle_t time_start;
raw_spinlock_t start_lock;
struct dentry *dir;
struct dentry *options;
@@ -198,7 +218,6 @@ struct trace_array {
struct list_head systems;
struct list_head events;
struct task_struct *waiter;
- struct trace_array_cpu __percpu *data;
};
enum {
@@ -345,9 +364,11 @@ struct tracer {
struct tracer *next;
struct tracer_flags *flags;
bool print_max;
+ bool enabled;
+#ifdef CONFIG_TRACER_MAX_TRACE
bool use_max_tr;
bool allocated_snapshot;
- bool enabled;
+#endif
};
@@ -493,8 +514,8 @@ trace_buffer_iter(struct trace_iterator *iter, int cpu)
int tracer_init(struct tracer *t, struct trace_array *tr);
int tracing_is_enabled(void);
-void tracing_reset(struct trace_array *tr, int cpu);
-void tracing_reset_online_cpus(struct trace_array *tr);
+void tracing_reset(struct trace_buffer *buf, int cpu);
+void tracing_reset_online_cpus(struct trace_buffer *buf);
void tracing_reset_current(int cpu);
void tracing_reset_all_online_cpus(void);
int tracing_open_generic(struct inode *inode, struct file *filp);
@@ -674,6 +695,8 @@ trace_array_vprintk(struct trace_array *tr,
unsigned long ip, const char *fmt, va_list args);
int trace_array_printk(struct trace_array *tr,
unsigned long ip, const char *fmt, ...);
+int trace_array_printk_buf(struct ring_buffer *buffer,
+ unsigned long ip, const char *fmt, ...);
void trace_printk_seq(struct trace_seq *s);
enum print_line_t print_trace_line(struct trace_iterator *iter);
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 9d73861efc6a..e467c0c7bdd5 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -28,7 +28,7 @@ static void tracing_stop_function_trace(void);
static int function_trace_init(struct trace_array *tr)
{
func_trace = tr;
- tr->cpu = get_cpu();
+ tr->trace_buffer.cpu = get_cpu();
put_cpu();
tracing_start_cmdline_record();
@@ -44,7 +44,7 @@ static void function_trace_reset(struct trace_array *tr)
static void function_trace_start(struct trace_array *tr)
{
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
}
/* Our option */
@@ -76,7 +76,7 @@ function_trace_call(unsigned long ip, unsigned long parent_ip,
goto out;
cpu = smp_processor_id();
- data = per_cpu_ptr(tr->data, cpu);
+ data = per_cpu_ptr(tr->trace_buffer.data, cpu);
if (!atomic_read(&data->disabled)) {
local_save_flags(flags);
trace_function(tr, ip, parent_ip, flags, pc);
@@ -107,7 +107,7 @@ function_stack_trace_call(unsigned long ip, unsigned long parent_ip,
*/
local_irq_save(flags);
cpu = raw_smp_processor_id();
- data = per_cpu_ptr(tr->data, cpu);
+ data = per_cpu_ptr(tr->trace_buffer.data, cpu);
disabled = atomic_inc_return(&data->disabled);
if (likely(disabled == 1)) {
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index ca986d61a282..8388bc99f2ee 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -218,7 +218,7 @@ int __trace_graph_entry(struct trace_array *tr,
{
struct ftrace_event_call *call = &event_funcgraph_entry;
struct ring_buffer_event *event;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
struct ftrace_graph_ent_entry *entry;
if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
@@ -265,7 +265,7 @@ int trace_graph_entry(struct ftrace_graph_ent *trace)
local_irq_save(flags);
cpu = raw_smp_processor_id();
- data = per_cpu_ptr(tr->data, cpu);
+ data = per_cpu_ptr(tr->trace_buffer.data, cpu);
disabled = atomic_inc_return(&data->disabled);
if (likely(disabled == 1)) {
pc = preempt_count();
@@ -323,7 +323,7 @@ void __trace_graph_return(struct trace_array *tr,
{
struct ftrace_event_call *call = &event_funcgraph_exit;
struct ring_buffer_event *event;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
struct ftrace_graph_ret_entry *entry;
if (unlikely(__this_cpu_read(ftrace_cpu_disabled)))
@@ -350,7 +350,7 @@ void trace_graph_return(struct ftrace_graph_ret *trace)
local_irq_save(flags);
cpu = raw_smp_processor_id();
- data = per_cpu_ptr(tr->data, cpu);
+ data = per_cpu_ptr(tr->trace_buffer.data, cpu);
disabled = atomic_inc_return(&data->disabled);
if (likely(disabled == 1)) {
pc = preempt_count();
@@ -560,9 +560,9 @@ get_return_for_leaf(struct trace_iterator *iter,
* We need to consume the current entry to see
* the next one.
*/
- ring_buffer_consume(iter->tr->buffer, iter->cpu,
+ ring_buffer_consume(iter->trace_buffer->buffer, iter->cpu,
NULL, NULL);
- event = ring_buffer_peek(iter->tr->buffer, iter->cpu,
+ event = ring_buffer_peek(iter->trace_buffer->buffer, iter->cpu,
NULL, NULL);
}
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 9b52f9cf7a0d..5aa40ab72b57 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -121,7 +121,7 @@ static int func_prolog_dec(struct trace_array *tr,
if (!irqs_disabled_flags(*flags))
return 0;
- *data = per_cpu_ptr(tr->data, cpu);
+ *data = per_cpu_ptr(tr->trace_buffer.data, cpu);
disabled = atomic_inc_return(&(*data)->disabled);
if (likely(disabled == 1))
@@ -175,7 +175,7 @@ static int irqsoff_set_flag(u32 old_flags, u32 bit, int set)
per_cpu(tracing_cpu, cpu) = 0;
tracing_max_latency = 0;
- tracing_reset_online_cpus(irqsoff_trace);
+ tracing_reset_online_cpus(&irqsoff_trace->trace_buffer);
return start_irqsoff_tracer(irqsoff_trace, set);
}
@@ -380,7 +380,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
if (per_cpu(tracing_cpu, cpu))
return;
- data = per_cpu_ptr(tr->data, cpu);
+ data = per_cpu_ptr(tr->trace_buffer.data, cpu);
if (unlikely(!data) || atomic_read(&data->disabled))
return;
@@ -418,7 +418,7 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip)
if (!tracer_enabled)
return;
- data = per_cpu_ptr(tr->data, cpu);
+ data = per_cpu_ptr(tr->trace_buffer.data, cpu);
if (unlikely(!data) ||
!data->critical_start || atomic_read(&data->disabled))
@@ -568,7 +568,7 @@ static void __irqsoff_tracer_init(struct trace_array *tr)
irqsoff_trace = tr;
/* make sure that the tracer is visible */
smp_wmb();
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
if (start_irqsoff_tracer(tr, is_graph()))
printk(KERN_ERR "failed to start irqsoff tracer\n");
diff --git a/kernel/trace/trace_kdb.c b/kernel/trace/trace_kdb.c
index 349f6941e8f2..bd90e1b06088 100644
--- a/kernel/trace/trace_kdb.c
+++ b/kernel/trace/trace_kdb.c
@@ -26,7 +26,7 @@ static void ftrace_dump_buf(int skip_lines, long cpu_file)
trace_init_global_iter(&iter);
for_each_tracing_cpu(cpu) {
- atomic_inc(&per_cpu_ptr(iter.tr->data, cpu)->disabled);
+ atomic_inc(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
}
old_userobj = trace_flags;
@@ -46,14 +46,14 @@ static void ftrace_dump_buf(int skip_lines, long cpu_file)
if (cpu_file == RING_BUFFER_ALL_CPUS) {
for_each_tracing_cpu(cpu) {
iter.buffer_iter[cpu] =
- ring_buffer_read_prepare(iter.tr->buffer, cpu);
+ ring_buffer_read_prepare(iter.trace_buffer->buffer, cpu);
ring_buffer_read_start(iter.buffer_iter[cpu]);
tracing_iter_reset(&iter, cpu);
}
} else {
iter.cpu_file = cpu_file;
iter.buffer_iter[cpu_file] =
- ring_buffer_read_prepare(iter.tr->buffer, cpu_file);
+ ring_buffer_read_prepare(iter.trace_buffer->buffer, cpu_file);
ring_buffer_read_start(iter.buffer_iter[cpu_file]);
tracing_iter_reset(&iter, cpu_file);
}
@@ -83,7 +83,7 @@ out:
trace_flags = old_userobj;
for_each_tracing_cpu(cpu) {
- atomic_dec(&per_cpu_ptr(iter.tr->data, cpu)->disabled);
+ atomic_dec(&per_cpu_ptr(iter.trace_buffer->data, cpu)->disabled);
}
for_each_tracing_cpu(cpu)
diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index 2472f6f76b50..a5e8f4878bfa 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -31,7 +31,7 @@ static void mmio_reset_data(struct trace_array *tr)
overrun_detected = false;
prev_overruns = 0;
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
}
static int mmio_trace_init(struct trace_array *tr)
@@ -128,7 +128,7 @@ static void mmio_close(struct trace_iterator *iter)
static unsigned long count_overruns(struct trace_iterator *iter)
{
unsigned long cnt = atomic_xchg(&dropped_count, 0);
- unsigned long over = ring_buffer_overruns(iter->tr->buffer);
+ unsigned long over = ring_buffer_overruns(iter->trace_buffer->buffer);
if (over > prev_overruns)
cnt += over - prev_overruns;
@@ -309,7 +309,7 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
struct mmiotrace_rw *rw)
{
struct ftrace_event_call *call = &event_mmiotrace_rw;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
struct ring_buffer_event *event;
struct trace_mmiotrace_rw *entry;
int pc = preempt_count();
@@ -330,7 +330,7 @@ static void __trace_mmiotrace_rw(struct trace_array *tr,
void mmio_trace_rw(struct mmiotrace_rw *rw)
{
struct trace_array *tr = mmio_trace_array;
- struct trace_array_cpu *data = per_cpu_ptr(tr->data, smp_processor_id());
+ struct trace_array_cpu *data = per_cpu_ptr(tr->trace_buffer.data, smp_processor_id());
__trace_mmiotrace_rw(tr, data, rw);
}
@@ -339,7 +339,7 @@ static void __trace_mmiotrace_map(struct trace_array *tr,
struct mmiotrace_map *map)
{
struct ftrace_event_call *call = &event_mmiotrace_map;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
struct ring_buffer_event *event;
struct trace_mmiotrace_map *entry;
int pc = preempt_count();
@@ -363,7 +363,7 @@ void mmio_trace_mapping(struct mmiotrace_map *map)
struct trace_array_cpu *data;
preempt_disable();
- data = per_cpu_ptr(tr->data, smp_processor_id());
+ data = per_cpu_ptr(tr->trace_buffer.data, smp_processor_id());
__trace_mmiotrace_map(tr, data, map);
preempt_enable();
}
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index aa92ac322ba2..2edc7220d017 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -643,7 +643,7 @@ lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
{
unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
- unsigned long long abs_ts = iter->ts - iter->tr->time_start;
+ unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
unsigned long long rel_ts = next_ts - iter->ts;
struct trace_seq *s = &iter->seq;
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 1ffe39abd6fc..4e98e3b257a3 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -28,7 +28,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
unsigned long flags, int pc)
{
struct ftrace_event_call *call = &event_context_switch;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
@@ -69,7 +69,7 @@ probe_sched_switch(void *ignore, struct task_struct *prev, struct task_struct *n
pc = preempt_count();
local_irq_save(flags);
cpu = raw_smp_processor_id();
- data = per_cpu_ptr(ctx_trace->data, cpu);
+ data = per_cpu_ptr(ctx_trace->trace_buffer.data, cpu);
if (likely(!atomic_read(&data->disabled)))
tracing_sched_switch_trace(ctx_trace, prev, next, flags, pc);
@@ -86,7 +86,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
struct ftrace_event_call *call = &event_wakeup;
struct ring_buffer_event *event;
struct ctx_switch_entry *entry;
- struct ring_buffer *buffer = tr->buffer;
+ struct ring_buffer *buffer = tr->trace_buffer.buffer;
event = trace_buffer_lock_reserve(buffer, TRACE_WAKE,
sizeof(*entry), flags, pc);
@@ -123,7 +123,7 @@ probe_sched_wakeup(void *ignore, struct task_struct *wakee, int success)
pc = preempt_count();
local_irq_save(flags);
cpu = raw_smp_processor_id();
- data = per_cpu_ptr(ctx_trace->data, cpu);
+ data = per_cpu_ptr(ctx_trace->trace_buffer.data, cpu);
if (likely(!atomic_read(&data->disabled)))
tracing_sched_wakeup_trace(ctx_trace, wakee, current,
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index f9ceb75a95b7..c16f8cd63c3c 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -89,7 +89,7 @@ func_prolog_preempt_disable(struct trace_array *tr,
if (cpu != wakeup_current_cpu)
goto out_enable;
- *data = per_cpu_ptr(tr->data, cpu);
+ *data = per_cpu_ptr(tr->trace_buffer.data, cpu);
disabled = atomic_inc_return(&(*data)->disabled);
if (unlikely(disabled != 1))
goto out;
@@ -353,7 +353,7 @@ probe_wakeup_sched_switch(void *ignore,
/* disable local data, not wakeup_cpu data */
cpu = raw_smp_processor_id();
- disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->data, cpu)->disabled);
+ disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
if (likely(disabled != 1))
goto out;
@@ -365,7 +365,7 @@ probe_wakeup_sched_switch(void *ignore,
goto out_unlock;
/* The task we are waiting for is waking up */
- data = per_cpu_ptr(wakeup_trace->data, wakeup_cpu);
+ data = per_cpu_ptr(wakeup_trace->trace_buffer.data, wakeup_cpu);
__trace_function(wakeup_trace, CALLER_ADDR0, CALLER_ADDR1, flags, pc);
tracing_sched_switch_trace(wakeup_trace, prev, next, flags, pc);
@@ -387,7 +387,7 @@ out_unlock:
arch_spin_unlock(&wakeup_lock);
local_irq_restore(flags);
out:
- atomic_dec(&per_cpu_ptr(wakeup_trace->data, cpu)->disabled);
+ atomic_dec(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
}
static void __wakeup_reset(struct trace_array *tr)
@@ -405,7 +405,7 @@ static void wakeup_reset(struct trace_array *tr)
{
unsigned long flags;
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
local_irq_save(flags);
arch_spin_lock(&wakeup_lock);
@@ -435,7 +435,7 @@ probe_wakeup(void *ignore, struct task_struct *p, int success)
return;
pc = preempt_count();
- disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->data, cpu)->disabled);
+ disabled = atomic_inc_return(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
if (unlikely(disabled != 1))
goto out;
@@ -458,7 +458,7 @@ probe_wakeup(void *ignore, struct task_struct *p, int success)
local_save_flags(flags);
- data = per_cpu_ptr(wakeup_trace->data, wakeup_cpu);
+ data = per_cpu_ptr(wakeup_trace->trace_buffer.data, wakeup_cpu);
data->preempt_timestamp = ftrace_now(cpu);
tracing_sched_wakeup_trace(wakeup_trace, p, current, flags, pc);
@@ -472,7 +472,7 @@ probe_wakeup(void *ignore, struct task_struct *p, int success)
out_locked:
arch_spin_unlock(&wakeup_lock);
out:
- atomic_dec(&per_cpu_ptr(wakeup_trace->data, cpu)->disabled);
+ atomic_dec(&per_cpu_ptr(wakeup_trace->trace_buffer.data, cpu)->disabled);
}
static void start_wakeup_tracer(struct trace_array *tr)
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 51c819c12c29..8672c40cb153 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -21,13 +21,13 @@ static inline int trace_valid_entry(struct trace_entry *entry)
return 0;
}
-static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
+static int trace_test_buffer_cpu(struct trace_buffer *buf, int cpu)
{
struct ring_buffer_event *event;
struct trace_entry *entry;
unsigned int loops = 0;
- while ((event = ring_buffer_consume(tr->buffer, cpu, NULL, NULL))) {
+ while ((event = ring_buffer_consume(buf->buffer, cpu, NULL, NULL))) {
entry = ring_buffer_event_data(event);
/*
@@ -58,7 +58,7 @@ static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
* Test the trace buffer to see if all the elements
* are still sane.
*/
-static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
+static int trace_test_buffer(struct trace_buffer *buf, unsigned long *count)
{
unsigned long flags, cnt = 0;
int cpu, ret = 0;
@@ -67,7 +67,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
local_irq_save(flags);
arch_spin_lock(&ftrace_max_lock);
- cnt = ring_buffer_entries(tr->buffer);
+ cnt = ring_buffer_entries(buf->buffer);
/*
* The trace_test_buffer_cpu runs a while loop to consume all data.
@@ -78,7 +78,7 @@ static int trace_test_buffer(struct trace_array *tr, unsigned long *count)
*/
tracing_off();
for_each_possible_cpu(cpu) {
- ret = trace_test_buffer_cpu(tr, cpu);
+ ret = trace_test_buffer_cpu(buf, cpu);
if (ret)
break;
}
@@ -355,7 +355,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
msleep(100);
/* we should have nothing in the buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
if (ret)
goto out;
@@ -376,7 +376,7 @@ int trace_selftest_startup_dynamic_tracing(struct tracer *trace,
ftrace_enabled = 0;
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
tracing_start();
/* we should only have one item */
@@ -666,7 +666,7 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
ftrace_enabled = 0;
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -737,7 +737,7 @@ trace_selftest_startup_function_graph(struct tracer *trace,
* Simulate the init() callback but we attach a watchdog callback
* to detect and recover from possible hangs
*/
- tracing_reset_online_cpus(tr);
+ tracing_reset_online_cpus(&tr->trace_buffer);
set_graph_array(tr);
ret = register_ftrace_graph(&trace_graph_return,
&trace_graph_entry_watchdog);
@@ -760,7 +760,7 @@ trace_selftest_startup_function_graph(struct tracer *trace,
tracing_stop();
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -815,9 +815,9 @@ trace_selftest_startup_irqsoff(struct tracer *trace, struct trace_array *tr)
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (!ret)
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -877,9 +877,9 @@ trace_selftest_startup_preemptoff(struct tracer *trace, struct trace_array *tr)
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (!ret)
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
trace->reset(tr);
tracing_start();
@@ -943,11 +943,11 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (ret)
goto out;
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
if (ret)
goto out;
@@ -973,11 +973,11 @@ trace_selftest_startup_preemptirqsoff(struct tracer *trace, struct trace_array *
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
if (ret)
goto out;
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
if (!ret && !count) {
printk(KERN_CONT ".. no entries found ..");
@@ -1084,10 +1084,10 @@ trace_selftest_startup_wakeup(struct tracer *trace, struct trace_array *tr)
/* stop the tracing. */
tracing_stop();
/* check both trace buffers */
- ret = trace_test_buffer(tr, NULL);
+ ret = trace_test_buffer(&tr->trace_buffer, NULL);
printk("ret = %d\n", ret);
if (!ret)
- ret = trace_test_buffer(&max_tr, &count);
+ ret = trace_test_buffer(&tr->max_buffer, &count);
trace->reset(tr);
@@ -1126,7 +1126,7 @@ trace_selftest_startup_sched_switch(struct tracer *trace, struct trace_array *tr
/* stop the tracing. */
tracing_stop();
/* check the trace buffer */
- ret = trace_test_buffer(tr, &count);
+ ret = trace_test_buffer(&tr->trace_buffer, &count);
trace->reset(tr);
tracing_start();
diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 1cd37ffb4093..68f3f344be65 100644
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -321,7 +321,7 @@ static void ftrace_syscall_enter(void *data, struct pt_regs *regs, long id)
size = sizeof(*entry) + sizeof(unsigned long) * sys_data->nb_args;
- buffer = tr->buffer;
+ buffer = tr->trace_buffer.buffer;
event = trace_buffer_lock_reserve(buffer,
sys_data->enter_event->event.type, size, 0, 0);
if (!event)
@@ -355,7 +355,7 @@ static void ftrace_syscall_exit(void *data, struct pt_regs *regs, long ret)
if (!sys_data)
return;
- buffer = tr->buffer;
+ buffer = tr->trace_buffer.buffer;
event = trace_buffer_lock_reserve(buffer,
sys_data->exit_event->event.type, sizeof(*entry), 0, 0);
if (!event)
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