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Florian Westphal says: ==================== tcp: re-add header prediction Eric reported a performance regression caused by header prediction removal. We now call tcp_ack() much more frequently, for some workloads this brings in enough cache line misses to become noticeable. We could possibly still kill HP provided we find a different way to suppress unneeded tcp_ack, but given we're late in the cycle it seems preferable to revert. ==================== Signed-off-by: David S. Miller <[email protected]>
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