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Commit 83895147 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

Merge branch 'sched/urgent' into timers/urgent 



Merging it here because an upcoming timers/urgent fix relies on
a change already in sched/urgent and not yet upstream.

Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parents a6a95406 483b4ee6

include/linux/sched.h

+1 −0
Original line number Diff line number Diff line
@@ -443,6 +443,7 @@ struct pacct_struct { 
 * @utime:		time spent in user mode, in &cputime_t units

 * @stime:		time spent in kernel mode, in &cputime_t units

 * @sum_exec_runtime:	total time spent on the CPU, in nanoseconds

 * @lock:		lock for fields in this struct

 *

 * This structure groups together three kinds of CPU time that are

 * tracked for threads and thread groups.  Most things considering

kernel/sched.c

+11 −6
Original line number Diff line number Diff line
@@ -3890,19 +3890,24 @@ int select_nohz_load_balancer(int stop_tick) 
	int cpu = smp_processor_id();



	if (stop_tick) {

		cpumask_set_cpu(cpu, nohz.cpu_mask);

		cpu_rq(cpu)->in_nohz_recently = 1;



		if (!cpu_active(cpu)) {

			if (atomic_read(&nohz.load_balancer) != cpu)

				return 0;



			/*

		 * If we are going offline and still the leader, give up!

			 * If we are going offline and still the leader,

			 * give up!

			 */

		if (!cpu_active(cpu) &&

		    atomic_read(&nohz.load_balancer) == cpu) {

			if (atomic_cmpxchg(&nohz.load_balancer, cpu, -1) != cpu)

				BUG();



			return 0;

		}



		cpumask_set_cpu(cpu, nohz.cpu_mask);



		/* time for ilb owner also to sleep */

		if (cpumask_weight(nohz.cpu_mask) == num_online_cpus()) {

			if (atomic_read(&nohz.load_balancer) == cpu)