There was a proposal under discussion the past few months on building x86-64-v3 packages for Fedora 45 while retaining x86-64-v1 packages. The hope was building the Fedora packages with x86-64-v3 where AVX/AVX2, FMA, BMI2, and other newer ISA features can be assumed in the name of better performance. Unfortunately, the x86-64-v3 plans are now delayed but may be reconsidered next year with Fedora 46.

The x86_64-v3 micro-architecture feature level is for Intel and AMD processors of roughly the past decade or longer. Intel Haswell and newer or AMD Excavator CPUs and newer cover x86_64-v3 where there is AVX/AVX2, FMA, BMI(2), MOVBE, XSAVE, and other ISA capabilities. Some Linux distributions like RHEL 10 already require x86_64-v3 as a sane default since it basically covers nearly all Intel/AMD systems of the past decade.

There was a proposal to add x86_64-v3 as a primary architecture on Fedora Linux while retaining x86_64 (v1) support for those on dated systems. This is of interest to many parties for better performance, including Microsoft with their new Azure Linux base built on Fedora and desiring an x86_64-v3 baseline for their purposes.

After months being debated and waiting on more performance data for the Fedora Engineering and Steering Committee (FESCo) to evaluate, the members have now decided to reject this change for Fedora 45. FESCo will allow the change to be re-submitted for Fedora 46 when additional performance data is provided. They also are seeking details on how the install media would be handled in this x86_64-v3-supported world.

So, sadly, there will not be x86_64-v3 packages for Fedora 45 this year but hope next year with Fedora 46 for better embracing the hardware of this past decade.