Turbo Boost Max 3.0 support

How long does it typically take RHEL to incorporate new kernel fixes into their release?

I'm not sure why Intel only appear to support TBM 3.0 in windows!

We have seen some interesting issues with i9 performance on RHEL.

Support for TBM 3.0 seems to be enabled in kernel 4.10 upwards.

I've read that more fixes are in kernel 4.15:
https://www.phoronix.com/scan.php?page=news_item&px=Linux-4.15-TBM3-Skylake-Fix

Any ideas how long RHEL will take to support?