With rc2 result. It looks like there is a noticeable difference between
v4.12-rc3 and v4.12-rc4.

@Joseph, can you please start looking into diffs? I'm keeping one
dedicated node just for this testing, so I can run the same script one
by one for more bisections.

v4.12-rc1 - bad (3 of 3)
v4.12-rc2 - bad (15 of 53 - 28.3%)
v4.12-rc3 - bad (24 of 90 - 26.6%)
v4.12-rc4 - relatively good (1 of 70 - 1.4%)
v4.12 - relatively good (5 out of 68 - 7.4%)
v4.13 - good (0 out of 41 - 0%)

FWIW, I will run the same test with xenial's 4.4 kernel to make sure
around 30% is the base line of "bad".

** Attachment added: "bond_check_xenial_mainline_4.12-rc2_full.log"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1753662/+attachment/5072683/+files/bond_check_xenial_mainline_4.12-rc2_full.log

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Title:
  [i40e] LACP bonding start up race conditions

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