Linux 5.15-rc3 overall is looking good. Linus noted in today's announcement, " So after a somewhat rocky merge window and second rc, things are now actually looking pretty normal for rc3. Knock wood. "
He went on to add in the 5.15-rc3 announcement , " There are fixes all over, and the statistics look fairly regular, with drivers dominating as they should (since they are most of the tree). And outside of drivers, we have a fairly usual mix of changes - architecture fixes, networking, filesystems, and tooling (the latter being mostly kvm selftests). "
Also notable with Linux 5.15-rc3 is the performance regression fix for a noted performance regression affecting a variety of workloads under Linux 5.15 development up to now.
See the Linux 5.15 feature overview for a listing of all the changes in store for this next kernel version that looks to be introduced as stable in early November.