kdbus + systemd = good bye old dbus-daemon
洪高刚
原文出处http://ixit.cz/kdbus-systemd-good-bye-old-dbus-daemon/
kdbus + systemd = good bye old dbus-daemon
D-Bus is a system for low-latency, low-overhead, easy to use interprocess communication (IPC).
Since today, I replaced old style dbus-daemon with kdbus (in-kernel dbus implementation) and systemd Legacy D-Bus Protocol Compatibility Daemon.
It consists of two parts:
- kdbus – very basic dbus abilities, running in kernel
- systemd dbus compatibility layer is based on kdbus, running from user space
Main Differences:
- Improved performance (even for emulated DBus)
- Slightly better boot time
- kdbus is better suited for embedded devices (such as automotive)
- Bigger frameworks will be soon migrated directly to kdbus
Do you want try it?
How to enable it?
Warning: it may change your network interface names, if you switching from systemd-208-r2!
USE="kdbus" emerge -av1 systemd::gentoo
UPDATE: Changes was merged from ixit overlay into official gentoo
Second thing – you need compiled KDBUS as module or directly as part of kernel.
Beware, you should use at least kernel 3.12 series or later.
Module or kernel part:
# journalctl -b | grep kdbus
Dec 28 22:55:57 machine kernel: kdbus: initialized
Systemd userspace:
# journalctl -b | grep D-Bus
Dec 28 22:55:57 machine systemd[1]: Starting Legacy D-Bus Protocol Compatibility Socket.
Dec 28 22:55:57 machine systemd[1]: Listening on Legacy D-Bus Protocol Compatibility Socket.
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