diff options
| author | Paul Turner <pjt@google.com> | 2012-08-23 07:14:38 -0700 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2012-10-03 14:21:53 +0530 |
| commit | 7bf24537e753209194c43f41fb3adff82e7b8bc3 (patch) | |
| tree | 09a5528fde00a81166cfc56b9dc5e2f2ac5b8d66 /kernel/sched/sched.h | |
| parent | 12d1adb68b9d7c691b0f64017fe8a8b6b3fe5797 (diff) | |
sched: introduce temporary FAIR_GROUP_SCHED dependency for load-tracking
While per-entity load-tracking is generally useful, beyond computing shares
distribution, e.g.
runnable based load-balance (in progress), governors, power-management, etc
These facilities are not yet consumers of this data. This may be trivially
reverted when the information is required; but avoid paying the overhead for
calculations we will not use until then.
Signed-off-by: Paul Turner <pjt@google.com>
Reviewed-by: Ben Segall <bsegall@google.com>
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index d26136a13f1..2bc4689f59a 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -225,6 +225,12 @@ struct cfs_rq { #endif #ifdef CONFIG_SMP +/* + * Load-tracking only depends on SMP, FAIR_GROUP_SCHED dependency below may be + * removed when useful for applications beyond shares distribution (e.g. + * load-balance). + */ +#ifdef CONFIG_FAIR_GROUP_SCHED /* * CFS Load tracking * Under CFS, load is tracked on a per-entity basis and aggregated up. @@ -234,7 +240,8 @@ struct cfs_rq { u64 runnable_load_avg, blocked_load_avg; atomic64_t decay_counter, removed_load; u64 last_decay; - +#endif /* CONFIG_FAIR_GROUP_SCHED */ +/* These always depend on CONFIG_FAIR_GROUP_SCHED */ #ifdef CONFIG_FAIR_GROUP_SCHED u32 tg_runnable_contrib, tg_usage_contrib; u64 tg_load_contrib; |