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| author | Paul Turner <pjt@google.com> | 2012-10-04 13:18:32 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-10-24 10:27:31 +0200 |
| commit | f4e26b120b9de84cb627bc7361ba43cfdc51341f (patch) | |
| tree | 19786e34c5de3c9b7c9c871a27b0f8d85cc8690d /include/linux/sched.h | |
| parent | 5b51f2f80b3b906ce59bd4dce6eca3c7f34cb1b9 (diff) | |
| download | op-kernel-dev-f4e26b120b9de84cb627bc7361ba43cfdc51341f.zip op-kernel-dev-f4e26b120b9de84cb627bc7361ba43cfdc51341f.tar.gz | |
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>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120823141507.422162369@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index e483ccb..e1581a0 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1168,7 +1168,13 @@ struct sched_entity { /* rq "owned" by this entity/group: */ struct cfs_rq *my_q; #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). + */ +#if defined(CONFIG_SMP) && defined(CONFIG_FAIR_GROUP_SCHED) + /* Per-entity load-tracking */ struct sched_avg avg; #endif }; |
