Queued into tip/tip.git’s “sched/urgent” Git branch today is a patch to disable the kernel scheduler’s NEXT_BUDDY functionality that was re-implemented back during the Linux 6.19 merge window. It turns out to cause some performance regressions that have yet to be otherwise addressed.

Linux 6.19 back during the merge window re-introduced the NEXT_BUDDY feature after being adapted for EEVDF. But it turns out there are some performance regressions from this code and thus the patch in sched/urgent to disable it… With it hitting this urgent TIP branch, it will presumably be mainlined in the coming days as part of the scheduler fixes.