Linux 5.12 Performance Is Looking Stable, In Good Shape
Long story short, aside from areas of noted changes for Linux 5.12, I am not seeing any benchmarks come out with unexpected results for better or worse. For one week now across continuous testing on many different systems, Linux 5.12 is looking to be in good shape and reliable with that swap fix causing no more file-system regressions.
I haven't hit any major regressions either, unlike Linux 5.11 that was impacted by the AMD frequency invariance issue.
There is only one possible regression I am loosely looking into: AMDGPU on at least the Radeon RX 5000 series seems to run into issues with the ParaView workstation visualization software leading to hangs or the session crashing. But as it's a workload not of interest to many readers and thus hard to justify spending much in the way of resources looking into it, but it's happened a few times now with the ParaView test on Linux 5.12 and not prior kernels. I haven't seen any other programs exhibiting issues with AMDGPU on Linux 5.12.
So long story short, Linux 5.12 (-rc2 and later) seem to be in good shape and haven't hit any big issues or other notable regressions. In any case, I continue to run more hardware and more tests on Linux 5.12 Git, so stay tuned should anything else turn up.
Linux 5.12 should be officially out by the end of April barring any major issues from coming up that could cause additional test releases.