[PATCH RESEND v9 09/10] sched: add SD_PREFER_SIBLING for SMT level

Vincent Guittot
2015-01-15T10:12:58Z

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