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    Subject[PATCH v9 09/10] sched: add SD_PREFER_SIBLING for SMT level
    Date
    Add the SD_PREFER_SIBLING flag for SMT level in order to ensure that
    the scheduler will put at least 1 task per core.

    Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
    Reviewed-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com>
    ---
    kernel/sched/core.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/kernel/sched/core.c b/kernel/sched/core.c
    index 37fb92c..731f2ad 100644
    --- a/kernel/sched/core.c
    +++ b/kernel/sched/core.c
    @@ -6165,6 +6165,7 @@ sd_init(struct sched_domain_topology_level *tl, int cpu)
    */

    if (sd->flags & SD_SHARE_CPUCAPACITY) {
    + sd->flags |= SD_PREFER_SIBLING;
    sd->imbalance_pct = 110;
    sd->smt_gain = 1178; /* ~15% */

    --
    1.9.1


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