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| author | Pengcheng Yang <yangpc@wangsu.com> | 2022-04-20 05:34:41 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-05-09 10:03:24 +0300 |
| commit | 2cba635570d817a012dac45eda032e4bbf60930b (patch) | |
| tree | 5d2fa21fe8c0ce84ccd4d7821a9f8bdf8c649728 /.gitignore | |
| parent | 3ea6190be92f1ee1a41b8111a0c19ab77532a458 (diff) | |
| download | linux-2cba635570d817a012dac45eda032e4bbf60930b.tar.xz | |
tcp: ensure to use the most recently sent skb when filling the rate sample
[ Upstream commit b253a0680ceadc5d7b4acca7aa2d870326cad8ad ]
If an ACK (s)acks multiple skbs, we favor the information
from the most recently sent skb by choosing the skb with
the highest prior_delivered count. But in the interval
between receiving ACKs, we send multiple skbs with the same
prior_delivered, because the tp->delivered only changes
when we receive an ACK.
We used RACK's solution, copying tcp_rack_sent_after() as
tcp_skb_sent_after() helper to determine "which packet was
sent last?". Later, we will use tcp_skb_sent_after() instead
in RACK.
Fixes: b9f64820fb22 ("tcp: track data delivery rate for a TCP connection")
Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Tested-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/1650422081-22153-1-git-send-email-yangpc@wangsu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to '.gitignore')
0 files changed, 0 insertions, 0 deletions