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x86, ftrace, hw-branch-tracer: reset trace buffer on close

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Reset the ftrace buffer on close. Since we use cyclic buffers, the
trace is not contiguous, anyway.

Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Markus Metzger 2009-01-19 10:33:31 +01:00 committed by Ingo Molnar
parent b1818748b0
commit e23b8ad834
1 changed files with 7 additions and 1 deletions
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8
kernel/trace/trace_hw_branches.c
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@ -274,6 +274,11 @@ static void trace_bts_prepare(struct trace_iterator *iter)
mutex_unlock(&bts_tracer_mutex);
}
static void trace_bts_close(struct trace_iterator *iter)
{
tracing_reset_online_cpus(iter->tr);
}
void trace_hw_branch_oops(void)
{
mutex_lock(&bts_tracer_mutex);
@ -292,7 +297,8 @@ struct tracer bts_tracer __read_mostly =
.print_line = bts_trace_print_line,
.start = bts_trace_start,
.stop = bts_trace_stop,
.open = trace_bts_prepare
.open = trace_bts_prepare,
.close = trace_bts_close
};
__init static int init_bts_trace(void)