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    Subject[PATCH v4 01/12] sched/fair: Move is_core_idle() out of CONFIG_NUMA
    Date
    asym_packing needs this function to determine whether an SMT core is a
    suitable destination for load balancing.

    Cc: Ben Segall <bsegall@google.com>
    Cc: Daniel Bristot de Oliveira <bristot@redhat.com>
    Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
    Cc: Ionela Voinescu <ionela.voinescu@arm.com>
    Cc: Len Brown <len.brown@intel.com>
    Cc: Mel Gorman <mgorman@suse.de>
    Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
    Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
    Cc: Steven Rostedt <rostedt@goodmis.org>
    Cc: Tim C. Chen <tim.c.chen@intel.com>
    Cc: Valentin Schneider <vschneid@redhat.com>
    Cc: x86@kernel.org
    Cc: linux-kernel@vger.kernel.org
    Tested-by: Zhang Rui <rui.zhang@intel.com>
    Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
    ---
    Changes since v3:
    * None

    Changes since v2:
    * Introduced this patch.

    Changes since v1:
    * N/A
    ---
    kernel/sched/fair.c | 34 +++++++++++++++++-----------------
    1 file changed, 17 insertions(+), 17 deletions(-)

    diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
    index 4dc1950ae5ae..57c106fa721d 100644
    --- a/kernel/sched/fair.c
    +++ b/kernel/sched/fair.c
    @@ -1064,6 +1064,23 @@ update_stats_curr_start(struct cfs_rq *cfs_rq, struct sched_entity *se)
    * Scheduling class queueing methods:
    */

    +static inline bool is_core_idle(int cpu)
    +{
    +#ifdef CONFIG_SCHED_SMT
    + int sibling;
    +
    + for_each_cpu(sibling, cpu_smt_mask(cpu)) {
    + if (cpu == sibling)
    + continue;
    +
    + if (!idle_cpu(sibling))
    + return false;
    + }
    +#endif
    +
    + return true;
    +}
    +
    #ifdef CONFIG_NUMA
    #define NUMA_IMBALANCE_MIN 2

    @@ -1700,23 +1717,6 @@ struct numa_stats {
    int idle_cpu;
    };

    -static inline bool is_core_idle(int cpu)
    -{
    -#ifdef CONFIG_SCHED_SMT
    - int sibling;
    -
    - for_each_cpu(sibling, cpu_smt_mask(cpu)) {
    - if (cpu == sibling)
    - continue;
    -
    - if (!idle_cpu(sibling))
    - return false;
    - }
    -#endif
    -
    - return true;
    -}
    -
    struct task_numa_env {
    struct task_struct *p;

    --
    2.25.1
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