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tracing: Clear all trace buffers when unloaded module event was used

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Currently we do not know what buffer a module event was enabled in.
On unload, it is safest to clear all buffer instances, not just the
top level buffer.

Todo: Clear only the buffer that the event was used in. The
infrastructure is there to do this, but it makes the code a bit
more complex. Lets get the current code vetted before we add that.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt (Red Hat)
2013-03-04 23:26:06 -05:00
committed by Steven Rostedt
parent 575380da8b
commit 873c642f59
3 changed files with 16 additions and 6 deletions
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10
kernel/trace/trace.c
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@@ -912,9 +912,15 @@ void tracing_reset_current(int cpu)
tracing_reset(&global_trace, cpu);
}
void tracing_reset_current_online_cpus(void)
void tracing_reset_all_online_cpus(void)
{
tracing_reset_online_cpus(&global_trace);
struct trace_array *tr;
mutex_lock(&trace_types_lock);
list_for_each_entry(tr, &ftrace_trace_arrays, list) {
tracing_reset_online_cpus(tr);
}
mutex_unlock(&trace_types_lock);
}
#define SAVED_CMDLINES 128