Nobody expects the spanish plonk squad! [LWN.net]

Nobody expects the spanish plonk squad!

Posted Dec 10, 2014 16:32 UTC (Wed) by nix (subscriber, #2304)
In reply to: Nobody expects the spanish plonk squad! by anselm
Parent article: The Grumpy Editor's guide to surviving the systemd debate

Sorry, last I encountered it, udev was userspace, right? And there are other things that do what udev does (Gentoo's fork, eudev, perhaps mdev?). That makes this a userspace/kernel ABI in my eyes, with multiple users, making breaking it verboten. What's worse they are multiple boot-critical users!

to post comments

Nobody expects the spanish plonk squad!

Posted Dec 10, 2014 20:53 UTC (Wed) by mathstuf (subscriber, #69389) [Link] (1 responses)

It's backwards. My understanding: the kernel and udev currently communicate over netlink. Newer udev will only talk over kdbus (netlink isn't going away in the kernel) and kdbus requires some userspace process to set up the bus (which systemd currently does). Gentoo can fix this by writing their own kdbus setup tool (which is what the warning was about).

Nobody expects the spanish plonk squad!

Posted Dec 11, 2014 17:04 UTC (Thu) by nix (subscriber, #2304) [Link]

Ah, so this is 'newer udev will require a bleeding-edge kernel yet again', not 'we're going to break everyone using older udev and force them to upgrade'. So I'm not as annoyed as I might be, and Al is probably more annoyed...