Re: [PATCH v3] tcp: fix tp->undo_retrans accounting in tcp_sacktag_one()

On Mon, 30 Aug 2021 05:00:10 -0400 zhenggy wrote:

Commit 10d3be569243 ("tcp-tso: do not split TSO packets at retransmit
time") may directly retrans a multiple segments TSO/GSO packet without
split, Since this commit, we can no longer assume that a retransmitted
packet is a single segment.

This patch fixes the tp->undo_retrans accounting in tcp_sacktag_one()
that use the actual segments(pcount) of the retransmitted packet.

Before that commit (10d3be569243), the assumption underlying the
tp->undo_retrans-- seems correct.

Fixes: 10d3be569243 ("tcp-tso: do not split TSO packets at retransmit time")

Please remove this empty line. There should be no empty lines between
tags.

Signed-off-by: zhenggy <redacted>

Please fix the data on your system and repost. I'm pretty sure this
wasn't posted on Aug 30th.