tracing: Add an option for disabling markers
In our application, we have trace markers spread through user-space. We have markers in GL, X, etc. These are super handy for Chrome's about:tracing feature (Chrome + system + kernel trace view), but can be very distracting when you're trying to debug a kernel issue. I normally, use "grep -v tracing_mark_write" but it would be nice if I could just temporarily disable markers all together. Link: http://lkml.kernel.org/r/1347066739-26285-1-git-send-email-msb@chromium.org CC: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Mandeep Singh Baines <msb@chromium.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
parent
50a011f640
commit
5224c3a315
2 changed files with 6 additions and 1 deletions
|
@ -328,7 +328,7 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait);
|
|||
unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK |
|
||||
TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME |
|
||||
TRACE_ITER_GRAPH_TIME | TRACE_ITER_RECORD_CMD | TRACE_ITER_OVERWRITE |
|
||||
TRACE_ITER_IRQ_INFO;
|
||||
TRACE_ITER_IRQ_INFO | TRACE_ITER_MARKERS;
|
||||
|
||||
static int trace_stop_count;
|
||||
static DEFINE_RAW_SPINLOCK(tracing_start_lock);
|
||||
|
@ -470,6 +470,7 @@ static const char *trace_options[] = {
|
|||
"overwrite",
|
||||
"disable_on_free",
|
||||
"irq-info",
|
||||
"markers",
|
||||
NULL
|
||||
};
|
||||
|
||||
|
@ -3886,6 +3887,9 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
|
|||
if (tracing_disabled)
|
||||
return -EINVAL;
|
||||
|
||||
if (!(trace_flags & TRACE_ITER_MARKERS))
|
||||
return -EINVAL;
|
||||
|
||||
if (cnt > TRACE_BUF_SIZE)
|
||||
cnt = TRACE_BUF_SIZE;
|
||||
|
||||
|
|
|
@ -680,6 +680,7 @@ enum trace_iterator_flags {
|
|||
TRACE_ITER_OVERWRITE = 0x200000,
|
||||
TRACE_ITER_STOP_ON_FREE = 0x400000,
|
||||
TRACE_ITER_IRQ_INFO = 0x800000,
|
||||
TRACE_ITER_MARKERS = 0x1000000,
|
||||
};
|
||||
|
||||
/*
|
||||
|
|
Reference in a new issue