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authorPengcheng Yang <yangpc@wangsu.com>2022-04-20 05:34:41 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-05-09 10:03:24 +0300
commit2cba635570d817a012dac45eda032e4bbf60930b (patch)
tree5d2fa21fe8c0ce84ccd4d7821a9f8bdf8c649728 /include/linux/eventfd.h
parent3ea6190be92f1ee1a41b8111a0c19ab77532a458 (diff)
downloadlinux-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 'include/linux/eventfd.h')
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