recursion_counter 2308 include/linux/netdevice.h u8 recursion_counter:4; recursion_counter 2324 include/linux/netdevice.h return ++NAPI_GRO_CB(skb)->recursion_counter == GRO_RECURSION_LIMIT; recursion_counter 5490 net/core/dev.c NAPI_GRO_CB(skb)->recursion_counter = 0;