If the cpu condition is suitable for power balance, power_lb will be set, perf_lb will be clean. If the condition is suitable for performance balance, their value will will set oppositely.
If the domain is suitable for power balance, but balance should not be down by this cpu, both of perf_lb and power_lb are cleared to wait a suitable cpu to do power balance. That mean no any balance, neither power balance nor performance balance in this domain. This logical will be implemented by following patches. Signed-off-by: Alex Shi <alex....@intel.com> --- kernel/sched/fair.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 729f35d..57a85cc 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3759,6 +3759,8 @@ struct lb_env { unsigned int loop; unsigned int loop_break; unsigned int loop_max; + int power_lb; /* if power balance needed */ + int perf_lb; /* if performance balance needed */ }; /* @@ -4909,6 +4911,8 @@ static int load_balance(int this_cpu, struct rq *this_rq, .idle = idle, .loop_break = sched_nr_migrate_break, .cpus = cpus, + .power_lb = 0, + .perf_lb = 1, }; cpumask_copy(cpus, cpu_active_mask); -- 1.7.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/