For years the BFQ (Budget Fair Queueing) I/O scheduler has been trying to get in the mainline kernel and it looks like they have an action plan for getting accepted upstream.
BFQ is a proportional-share I/O scheduler that shares a lot of code with the CFQ scheduler. The Completely Fair Queuing (CFQ) scheduler has long been part of the mainline tree but BFQ hasn't been pulled yet even after many revisions and code reviews. Despite that, it is used as a default I/O scheduler on several Linux distributions, such as Manjaro, OpenMandriva, Sabayon, or CyanoGenMod, for some devices.
While it doesn't look like it will be ready for the upcoming Linux 4.2 cycle, it appears BFQ getting accepted is becoming quite close (a Google Groups link).
A direct link to relevant lkml thread is http://lkml.org/lkml/2015/6/5/822.
(Score: 2, Insightful) by linkdude64 on Thursday June 11 2015, @07:39AM
It's always the same with your crowd: Don't be dissatisfied with the people who say you're the most racist, bigoted, sexist, close-minded scum on the planet. If you try to come to an understanding and not blindly supplicate, you're part of the problem.