diff options
| author | Vincent Guittot <vincent.guittot@linaro.org> | 2015-02-27 10:54:13 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-03-27 04:36:05 -0400 |
| commit | caff37ef96eac7fe96a582d032f6958e834e9447 (patch) | |
| tree | bb008dff6a59615a5f319e44f39f1aec7952839e /kernel/sched | |
| parent | dc7ff76eadb4b89fd39bb466b8f3773e5467c11d (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.c | 1 |
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) | |||
| 6240 | */ | 6240 | */ |
| 6241 | 6241 | ||
| 6242 | if (sd->flags & SD_SHARE_CPUCAPACITY) { | 6242 | if (sd->flags & SD_SHARE_CPUCAPACITY) { |
| 6243 | sd->flags |= SD_PREFER_SIBLING; | ||
| 6243 | sd->imbalance_pct = 110; | 6244 | sd->imbalance_pct = 110; |
| 6244 | sd->smt_gain = 1178; /* ~15% */ | 6245 | sd->smt_gain = 1178; /* ~15% */ |
| 6245 | 6246 | ||