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

  * [[https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217214|PR 217214]], [[https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=218270|PR 218270]] are closed, but %%NetAPP%% is experiencing this in stable/11 based builds. Happens during high loss scenarios. rscheff@ is still looking at it. Workaround seems to be disabling SACK.

  * Have there been UDP performance improvements for UDP? In the context of TCP over UDP, some improvements to LRO might be done by rrs@. For the context of QUIC, thj@ will look into possibilities to improve it.

  * Is the last [[https://reviews.freebsd.org/D32062|bugfix for RACK]] also needed for the base stack. The answer is no.

  * Using Compressed ACKs increases in Netflix testing the rate of TCP connections being reset. rrs@ is looking into it.

  * [[https://syzkaller.appspot.com/freebsd|syzkaller]] is finding some issues for the RACK and BBR stack. Right now tuexen@ can't reproduce them locally. tuexen@ will try different ways to reproduce them and get core dumps.

Next meeting: 07 October @ 1400 UTC