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Commit 827a31c6 authored by Pavankumar Kondeti's avatar Pavankumar Kondeti Committed by Gerrit - the friendly Code Review server
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sched: set LBF_IGNORE_PREFERRED_CLUSTER_TASKS correctly 



The LBF_IGNORE_PREFERRED_CLUSTER_TASKS flag needs to be set
for all types of inter-cluster load balance. Currently this
is set only when higher capacity CPU is pulling the tasks from
a lower capacity CPU. This can result in the migration of grouped
tasks from higher capacity cluster to lower capacity cluster.

Change-Id: Ib0476c5c85781804798ef49268e1b193859ff5ef
Signed-off-by: default avatarPavankumar Kondeti <pkondeti@codeaurora.org>
parent 314869eb

kernel/sched/fair.c

+3 −2
Original line number Diff line number Diff line
@@ -7940,10 +7940,11 @@ static int detach_tasks(struct lb_env *env) 
	if (env->imbalance <= 0)

		return 0;



	if (!same_cluster(env->dst_cpu, env->src_cpu))

		env->flags |= LBF_IGNORE_PREFERRED_CLUSTER_TASKS;



	if (cpu_capacity(env->dst_cpu) < cpu_capacity(env->src_cpu))

		env->flags |= LBF_IGNORE_BIG_TASKS;

	else if (!same_cluster(env->dst_cpu, env->src_cpu))

		env->flags |= LBF_IGNORE_PREFERRED_CLUSTER_TASKS;



redo:

	while (!list_empty(tasks)) {