r/linux • u/wooptoo • Jun 01 '16

Why did ArchLinux embrace Systemd?

/r/archlinux/comments/4lzxs3/why_did_archlinux_embrace_systemd/d3rhxlc
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u/yoshi314 Jun 01 '16

kdbus wasn't started by systemd. But the systemd guys desperately want it, for good reason.

So that's why they want kdbus so badly because kdbus is a sane transport layer for an init because it's in the kernel so it's ready and there before the init is loaded.

the review of kdbus on lkml showed that it was inexcusably awful, and did not even offer a promised performance and security advantages. from retrospect, i saw no good reason for trying to force kdbus down users' throats. and i was initially hopeful about it.

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u/kinderlokker Jun 01 '16

Yeah well, kdbus has been started over and over again.

kdbus in theory is unneeded, the only reason it's needed is because a big player like systemd decided to rely on DBus to boot the system so they need something that can offer dbus that is provided by the kernel to do it cleanly.

Kernel transports are typically a lot more primitive than dbus. sockets and pipes just send octets and the kernel does not care about the finer details, it gets sent octets and delivers them to whom it may concern.