From: Yuchung Cheng <>
Date: Thu,  9 Aug 2018 09:38:08 -0700

> This patch is a follow-up feature improvement to the recent fixes on
> the performance issues in ECN (delayed) ACKs. Many of the fixes use
> tcp_enter_quickack_mode routine to force immediate ACKs. However the
> routine also reset tracking interactive session. This is not ideal
> because these immediate ACKs are required by protocol specifics
> unrelated to the interactiveness nature of the application.
> This patch set introduces a new flag to send a one-time immediate ACK
> without changing the status of interactive session tracking. With this
> patch set the immediate ACKs are generated upon these protocol states:
> 1) When a hole is repaired
> 2) When CE status changes between subsequent data packets received
> 3) When a data packet carries CWR flag

This looks really nice, series applied.


Reply via email to