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net-tcp_bbr: v2: shrink delivered_mstamp, first_tx_mstamp to u32 to f…
…ree up 8 bytes Free up some space for tracking inflight and losses for each bw sample, in upcoming commits. These timestamps are in microseconds, and are now stored in 32 bits. So they can only hold time intervals up to roughly 2^12 = 4096 seconds. But Linux TCP RTT and RTO tracking has the same 32-bit microsecond implementation approach and resulting deployment limitations. So this is not introducing a new limit. And these should not be a limitation for the foreseeable future. Effort: net-tcp_bbr Origin-9xx-SHA1: 238a7e6b5d51625fef1ce7769826a7b21b02ae55 Change-Id: I3b779603797263b52a61ad57c565eb91fe42680c
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