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Linus Torvalds
e2457a664e
Pull scheduler updates from Ingo Molnar:
"Load-balancing updates:
- 'flatten the pick': improve cgroup scheduling, which has always
been problematic and painful, which has caused various scheduling
misbehavior such as the mishandling of reniced tasks et al.
Add various cgroup weight distribution methods via cgroup_mode:
'up', 'max', 'concur' and 'tasks' - with the default being 'concur'
which is the most precise yet also most expensive version.
Finally, change cgroup scheduling to a single runqueue (Peter
Zijlstra)
- Series to improve the scheduling latency of short slice tasks
(Vincent Guittot)
- Series to fix cluster scheduling in the presence of asymmetric
capacity (Ricardo Neri)
- Prefer fully idle cores for NOHZ balancing (Andrea Righi)
- Don't trigger active load-balancing if src_rq->curr is not on_rq
(Xin Zhao)
PSI updates:
- Skip irqtime accounting when no new irq time has elapsed (Usama
Arif)
Scheduler debugging updates:
- Remove unused schedstats (Shrikanth Hegde)
- Defer freeing of cpumask memblock memory to initcall (Waiman Long)
Misc fixes and updates by Yu C Chen, K Prateek Nayak, Peter Zijlstra,
Vincent Guittot, Xin Zhao, Yury Norov, Zhan Xusheng"
* tag 'sched-core-2026-08-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
sched/fair: Fix flat hierarchy
sched/isolation: Defer freeing of cpumask memblock memory to initcall
sched/topology: Restore SD_PREFER_SIBLING in domains with asymmetric capacity
sched/fair: Allow load balancing between CPUs of identical capacity
sched/fair: Skip misfit load accounting when the destination CPU cannot help
sched/fair: Check CPU capacity before comparing group types during load balance
sched/fair: Also gate overloaded status update for SD_ASYM_CPUCAPACITY
sched/fair: Do not skip CPUs of similar capacity with busy SMT siblings
sched/fair: Prefer fully idle cores for NOHZ balancing
stop_machine: Make stop_one_cpu_nowait() return void
sched/eevdf: Delayed dequeue task can't preempt
sched/fair: Fix stale comments referring to removed CFS concepts
sched/debug: Remove unused schedstats
sched/psi: skip irqtime accounting when no new irq time has elapsed
sched/fair: Reflow sched_balance_rq()
sched/fair: Simplify balance_interval reset logic in sched_balance_rq()
sched/fair: Don't trigger active lb if src_rq->curr is not on_rq
sched/eevdf: Speedup short slice task scheduling
sched/eevdf: Always update slice protection
sched/eevdf: Cancel slice protection if short slice task is eligible
...