enum perf_call_graph_mode record_mode;
u32 dump_size;
enum chain_mode mode;
+ u16 max_stack;
u32 print_limit;
double min_percent;
sort_chain_func_t sort;
};
extern struct callchain_param callchain_param;
+extern struct callchain_param callchain_param_default;
struct callchain_list {
u64 ip;