On Wed, 2017-01-25 at 09:26 -0500, Josef Bacik wrote: > Nope ftrace isn't broken, I'm just dumb, the space is being reclaimed > by sk_wmem_free_skb(). So I guess I need to figure out why I stop > getting ACK's from the other side of the loopback. Thanks,
ss -temoi dst 127.0.0.1 Might give you some hints, like packets being dropped. ACK can be delayed if the reader is slow to consume bytes.