[blucaz]

kdbus/bus1 were about making IPC primitives available race-free to userspace since the very first moment it is started. Perf was icing on the cake. Binder is Google-only, so nobody else can really use it, given they might kill it at any moment.

The end result of not having bus1 is that we have to forget about brokered IPC and go back to 1:1 bespoke protocols over af_unix - ie, varlink

[p_l]

Binder has been mainlined since a bit before kdbus project started, and can be in fact utilized with alternate implementations, as the kernel interface is explicitly not married to any specific content of the IPC.