GNOME's Mutter Begins Landing Transactional KMS Support
Written by Michael Larabel in GNOME on 20 June 2019 at 11:54 AM EDT. 8 Comments
GNOME --
Adding to the excitement of GNOME 3.34 and the many changes being worked on is Mutter seeing the initial merging of transactional kernel mode-setting (KMS) support.

This effort that has already been going on for months is about adopting a transactional API for Mutter so that it can make use of the Linux kernel's atomic KMS API. All of the key Linux DRM/KMS drivers these days support the atomic API (and is a requirement for merging of new drivers) but so far not many Linux desktop user-space components have switched over to using the new APIs.

This GNOME Transactional KMS support also has a goal of ultimately allowing its KMS interaction to be done in a separate CPU thread that can't be blocked by OpenGL rendering or other work.

So far Mutter has seen works done on restructuring of its APIs and to support transactional monitor configuration and page-flipping while other work remains in-progress.

Merged today to Mutter Git for GNOME 3.34 is the initial KMS transactional support. Hopefully the remainder of this transactional work can be finished for the GNOME 3.34 cycle but that has yet to be seen for how long it will take to fully sort out.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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