
This morning's 5.13-rt1 release re-bases these real-time patches against the Linux 5.13 code-base, contains a rework of the locking core code, also reworks "large parts" of the memory management code, and other updates.
These real-time patches for Linux 5.13 can be found on the kernel mailing list .
While in recent years there has been recurring talks about getting the RT support mainlined, RT upstreaming is currently held up by funding/resources .
The current Linux real-time project site is on the Linux Foundation Wiki .