The PREEMPT_RT Locking Code Is Merged For Linux 5.15
Written by Michael Larabel in Linux Kernel on 30 August 2021 at 07:30 PM EDT. 31 Comments
LINUX KERNEL --
It looks like the real-time (RT) patches for the Linux kernel are almost to the point of being fully upstream in the mainline Linux kernel. Merged for Linux 5.15 is the PREEMPT_RT locking code that represents a bulk of the outstanding RT patches.

Noted earlier this month was how the PREEMPT_RT locking code appeared ready for Linux 5.15 with it being queued up as part of the "sched/core" changes. Sure enough, on the first day of this Linux 5.15 merge window the pull request was sent out and already merged by Linus Torvalds to mainline.

As noted in that prior article, the real-time upstreaming was held up due to resources/funding but over the summer we've begun to see more patches flowing. The 72 locking patches now merged for Linux 5.15 make up a large part of the remaining work but as can be seen from linux-rt-devel's patches there still is more RT work to be upstreamed.

For those not building a real-time kernel, these locking patches should have no impact on their system. More details on all the work involved with these PREEMPT_RT locking changes can be found via this pull request now part of the mainline kernel.
Related News
About The Author
Author picture

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 20,000 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.

Popular News This Week