From: Lawrence Brakmo <bra...@fb.com> Date: Tue, 27 Sep 2016 19:03:37 -0700
> The current code changes txhash (flowlables) on every retransmitted > SYN/ACK, but only after the 2nd retransmitted SYN and only after > tcp_retries1 RTO retransmits. > > With this patch: > 1) txhash is changed with every SYN retransmits > 2) txhash is changed with every RTO. > > The result is that we can start re-routing around failed (or very > congested paths) as soon as possible. Otherwise application health > checks may fail and the connection may be terminated before we start > to change txhash. > > v4: Removed sysctl, txhash is changed for all RTOs > v3: Removed text saying default value of sysctl is 0 (it is 100) > v2: Added sysctl documentation and cleaned code > > Tested with packetdrill tests > > Signed-off-by: Lawrence Brakmo <bra...@fb.com> Applied, thanks.
