[Cake] WireGuard Queuing, Bufferbloat, Performance, Latency, and related issues

[Toke Høiland-Jørgensen]

Dave Taht <dave.taht at gmail.com> writes:

> My thought - given that at least on some platforms - encrypting 1000
> packets at a time is a bad idea - would be something regulating the
> amount of data being crypted at a time, an equivalent to byte queue
> limits - BQL - BCL? byte crypto limits - to keep no more than, say,
> 1ms of data in that part of the subsystem.

Well, the dynamic queue limit stuff is reusable (in
include/linux/dynamic_queue_limits.h). The netdev BQL stuff just uses
these functions with the packet byte sizes; so adapting it to use in
wireguard should be fairly straight forward :)

> ... also pulling stuff out of order from an already encrypted thing
> leads to the same IV problems we had in mac80211.

Yeah, but who needs IVs, really? ;)

-Toke