[PATCH 6.18 0/2] Acquire sched_balance_running only when needed

[Tim Chen <tim.c.chen@linux.intel.com>]

Balancing sched domains NUMA and above are serialized.
Currently, multiple sched group leader directly under NUMA domain could
attempt to acquire the global sched_balance_running flag via cmpxchg() before
checking whether load balancing is due. Fix unnecessary
sched_balance_running acquisition and also put newidle balance
properly in serialization.  This improves performance for OLTP workload
on large core count machines.

These patches have been merged upstream.

Thanks.

Tim

Peter Zijlstra (1):
  sched/fair: Have SD_SERIALIZE affect newidle balancing

Tim Chen (1):
  sched/fair: Skip sched_balance_running cmpxchg when balance is not due

 kernel/sched/fair.c | 54 +++++++++++++++++++++++----------------------
 1 file changed, 28 insertions(+), 26 deletions(-)

-- 
2.32.0