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tracing/ring-buffer: Only have tracing_on disable tracing buffers

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As the ring-buffer code is being used by other facilities in the
kernel, having tracing_on file disable *all* buffers is not a desired
affect. It should only disable the ftrace buffers that are being used.

Move the code into the trace.c file and use the buffer disabling
for tracing_on() and tracing_off(). This way only the ftrace buffers
will be affected by them and other kernel utilities will not be
confused to why their output suddenly stopped.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt
2012-02-22 15:50:28 -05:00
committed by Steven Rostedt
parent 5500fa5119
commit 499e547057
4 changed files with 171 additions and 97 deletions
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kernel/trace/trace.h
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@@ -154,6 +154,7 @@ struct trace_array {
struct ring_buffer *buffer;
unsigned long entries;
int cpu;
int buffer_disabled;
cycle_t time_start;
struct task_struct *waiter;
struct trace_array_cpu *data[NR_CPUS];