A Big Set Of Updates Come For KDBUS

With KDBUS not being called as a Linux 4.2 feature but rather being diverted with a focus on Linux 4.3, it's continuing to receive a great deal of code churn. Today it received a "big set of updates" for this controversial in-kernel IPC mechanism.

David Herrmann, a developer that's been involved in the open-source graphics work as well as systemd/KDBUS, sent in a pull request to Greg Kroah-Hartman today with his big set of KDBUS updates.

This KDBUS update request drops various unused features without breaking support for the old API, there's a full rewrite of the message importer, MATCH rules on the destination ID are now supported, and the metadata retrival has been changed as well.

Thanks to the rewritten message importer, the performance is said to be better. David noted, "this rewrite makes up most of this PR and reduces overhead of message transactions by roughly 40%. More optimizations are underway." Hopefully this does some good seeing as Linus Torvalds already criticized KDBUS on performance claims.

More details on this update to KDBUS can be found via this kernel mailing list message.