18June2020 [FreeBSD WIKI]

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Attendees:  rgrimes@, rscheff@, rrs@, thj@, tuexen@

====== Discussion ======
  * tuexen discussed how to mitigate blackhole detection problems
    * tuexen@ has a review to ensure we don't do blackhole detection once we are at the minimum value [[https://reviews.freebsd.org/D24308|D24308]]; committed
    * Discussion on what should trigger blackhole detection -- full size? Or, even smaller messages which are above our min MTU? For at least IPv6, min MTU makes sense.
    * Otherwise, tuexen@'s plan remains unchanged.
    * BBR and RACK needs some modifcation
  * Discussion of [[https://reviews.freebsd.org/D24237|D24237]]: rscheff@ changed both the in-order and out-of-order data path so we call sorwakeup_locked() [when necessary] after the SACK blocks are updated. Still ongoing. rrs@ will review.
  * [[https://reviews.freebsd.org/D24657|D24657]]: Waiting for testing by %%NetApp%%.
  * [[https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241958|PR241958]]: Not sure what happens there. tuexen will try to reproduce it on stable/12 in VBox. thj@ has reproduced this.
  * [[https://reviews.freebsd.org/D25016|D25016]]: Improve after idle. Don't overload variables and introduce a new variable. Approved.
  * TCP Window update where sent too often due to integer underflow. This is fixed now by rrs.
  * [[https://reviews.freebsd.org/D18624|D18624]]: Improve SACK. tuexen will review.
  * Can the TCP_STATS framework be turned on and sample no connections? Yes. thj@ will do.
  * [[https://reviews.freebsd.org/D25133|D25133]]: A possible simpler solution was suggested. rscheff@ will look at it. RACK and CUBIC should be able to work together.

Next meeting: 2 July @ 1700 UTC (DIFFERENT TIME!)