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 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 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.
• D24657: Waiting for testing by NetApp.
• PR241958: Not sure what happens there. tuexen will try to reproduce it on stable/12 in VBox. thj@ has reproduced this.
• 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.
• D18624: Improve SACK. tuexen will review.
• Can the TCP_STATS framework be turned on and sample no connections? Yes. thj@ will do.
• 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!)