sysctl__max_stack
if (val < 0 || val > sysctl__max_stack()) {
.max_stack = sysctl__max_stack(),
trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack();
if (size < (unsigned) sysctl__max_stack())
"Hint: Current value: %d", sysctl__max_stack());
int sysctl__max_stack(void);