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Subject[PATCH 0/2] sched/fair: Wake task within the cluster when possible
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This is the follow-up work to support cluster scheduler. Previously
we have added cluster level in the scheduler for both ARM64[1] and
X86[2] to support load balance between clusters to bring more memory
bandwidth and decrease cache contention. This patchset, on the other
hand, takes care of wake-up path by giving CPUs within the same cluster
a try before scanning the whole LLC to benefit those tasks communicating
with each other.

[1] 778c558f49a2 ("sched: Add cluster scheduler level in core and related Kconfig for ARM64")
[2] 66558b730f25 ("sched: Add cluster scheduler level for x86")

Barry Song (2):
sched: Add per_cpu cluster domain info and cpus_share_cluster API
sched/fair: Scan cluster before scanning LLC in wake-up path

include/linux/sched/sd_flags.h | 5 ++++
include/linux/sched/topology.h | 8 +++++-
kernel/sched/core.c | 12 +++++++++
kernel/sched/fair.c | 46 +++++++++++++++++++++++++++++++---
kernel/sched/sched.h | 2 ++
kernel/sched/topology.c | 9 +++++++
6 files changed, 77 insertions(+), 5 deletions(-)

--
2.33.0

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