From: Eric Dumazet
Date: Fri, 9 Aug 2019 05:04:47 -0700
> Starting from commit d41a69f1d390 ("tcp: make tcp_sendmsg() aware of socket
> backlog")
> loopback flows got hurt, because for each skb sent, the socket receives an
> immediate ACK and sk_flush_backlog() causes extra work.
>
> Intent wa
On Fri, Aug 9, 2019 at 8:04 AM Eric Dumazet wrote:
>
> Starting from commit d41a69f1d390 ("tcp: make tcp_sendmsg() aware of socket
> backlog")
> loopback flows got hurt, because for each skb sent, the socket receives an
> immediate ACK and sk_flush_backlog() causes extra work.
>
> Intent was to n
Starting from commit d41a69f1d390 ("tcp: make tcp_sendmsg() aware of socket
backlog")
loopback flows got hurt, because for each skb sent, the socket receives an
immediate ACK and sk_flush_backlog() causes extra work.
Intent was to not let the backlog grow too much, but we went a bit too far.
We
