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tcp_hpts: rename input queue to drop queue and trim dead code

Authored by glebius on Nov 16 2021, 9:39 PM.



The HPTS input queue is in reality used only for "delayed drops".
When a TCP stack decides to drop a connection on the input path
it can't do that due to locking protocol between main tcp_input()
and stacks. So, rack/bbr utilize HPTS to drop the connection in
a different context.

In the past the queue could also process input packets in context
of HPTS thread, but now no stack uses this, so remove this

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Event Timeline

This revision is now accepted and ready to land.Nov 17 2021, 7:23 PM
This revision now requires review to proceed.Nov 19 2021, 4:41 AM
This revision is now accepted and ready to land.Dec 2 2021, 7:46 PM