Commit 45da7a2b authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

sched/fair: Exclude the current CPU from find_new_ilb() 



It is possible for find_new_ilb() to select the current CPU, however,
this only happens from newidle balancing, in which case need_resched()
will be true, and consequently nohz_csd_func() will not trigger the
softirq.

Exclude the current CPU from becoming an ILB target.

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
parent b13772f8

kernel/sched/fair.c

+4 −0
Original line number Diff line number Diff line
@@ -10056,6 +10056,10 @@ static inline int find_new_ilb(void) 


	for_each_cpu_and(ilb, nohz.idle_cpus_mask,

			      housekeeping_cpumask(HK_FLAG_MISC)) {



		if (ilb == smp_processor_id())

			continue;



		if (idle_cpu(ilb))

			return ilb;

	}