diff options
Diffstat (limited to 'kernel/trace')
| -rw-r--r-- | kernel/trace/trace.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index e5df02c69b1..01176788c38 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3569,6 +3569,30 @@ tracing_entries_write(struct file *filp, const char __user *ubuf, } static ssize_t +tracing_total_entries_read(struct file *filp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct trace_array *tr = filp->private_data; + char buf[64]; + int r, cpu; + unsigned long size = 0, expanded_size = 0; + + mutex_lock(&trace_types_lock); + for_each_tracing_cpu(cpu) { + size += tr->entries >> 10; + if (!ring_buffer_expanded) + expanded_size += trace_buf_size >> 10; + } + if (ring_buffer_expanded) + r = sprintf(buf, "%lu\n", size); + else + r = sprintf(buf, "%lu (expanded: %lu)\n", size, expanded_size); + mutex_unlock(&trace_types_lock); + + return simple_read_from_buffer(ubuf, cnt, ppos, buf, r); +} + +static ssize_t tracing_free_buffer_write(struct file *filp, const char __user *ubuf, size_t cnt, loff_t *ppos) { @@ -3739,6 +3763,12 @@ static const struct file_operations tracing_entries_fops = { .llseek = generic_file_llseek, }; +static const struct file_operations tracing_total_entries_fops = { + .open = tracing_open_generic, + .read = tracing_total_entries_read, + .llseek = generic_file_llseek, +}; + static const struct file_operations tracing_free_buffer_fops = { .write = tracing_free_buffer_write, .release = tracing_free_buffer_release, @@ -4450,6 +4480,9 @@ static __init int tracer_init_debugfs(void) trace_create_file("buffer_size_kb", 0644, d_tracer, &global_trace, &tracing_entries_fops); + trace_create_file("buffer_total_size_kb", 0444, d_tracer, + &global_trace, &tracing_total_entries_fops); + trace_create_file("free_buffer", 0644, d_tracer, &global_trace, &tracing_free_buffer_fops); |