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Matthieu Baerts says: ==================== mptcp: rx path refactor Paolo worked on this RX path refactor for these two main reasons: - Currently, the MPTCP RX path introduces quite a bit of 'exceptional' accounting/locking processing WRT to plain TCP, adding up to the implementation complexity in a miserable way. - The performance gap WRT plain TCP for single subflow connections is quite measurable. The present refactor addresses both the above items: most of the additional complexity is dropped, and single stream performances increase measurably, from 55Gbps to 71Gbps in Paolo's loopback test. As a reference, plain TCP was around 84Gbps on the same host. The above comes to a price: the patch are invasive, even in subtle ways. Note: patch 5/7 removes the sk_forward_alloc_get() helper, which caused some trivial modifications in different places in the net tree: sockets, IPv4, sched. That's why a few more people have been Cc here. Feel free to only look at this patch 5/7. ==================== Link: https://patch.msgid.link/20250218-net-next-mptcp-rx-path-refactor-v1-0-4a47d90d7998@kernel.org Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Linux kernel
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