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authorVincent Guittot <vincent.guittot@linaro.org>2015-02-27 16:54:13 +0100
committerIngo Molnar <mingo@kernel.org>2015-03-27 09:36:05 +0100
commitcaff37ef96eac7fe96a582d032f6958e834e9447 (patch)
treebb008dff6a59615a5f319e44f39f1aec7952839e /kernel/sched
parentdc7ff76eadb4b89fd39bb466b8f3773e5467c11d (diff)
sched: Add SD_PREFER_SIBLING for SMT level
Add the SD_PREFER_SIBLING flag for SMT level in order to ensure that the scheduler will place at least one task per core. Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com> Cc: Morten.Rasmussen@arm.com Cc: dietmar.eggemann@arm.com Cc: efault@gmx.de Cc: kamalesh@linux.vnet.ibm.com Cc: linaro-kernel@lists.linaro.org Cc: nicolas.pitre@linaro.org Cc: riel@redhat.com Link: http://lkml.kernel.org/r/1425052454-25797-11-git-send-email-vincent.guittot@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 838fc9d1e7ab..043e2a13b8b9 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6240,6 +6240,7 @@ 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% */