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| author | Gregory Haskins <ghaskins@novell.com> | 2009-07-30 10:57:23 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-08-02 14:26:12 +0200 |
| commit | 00aec93d10a051ea64f83eff75d4065a19508ea6 (patch) | |
| tree | 010148caeaf4d4b36188ba15828343aa6c74efc9 /kernel/sched_rt.c | |
| parent | 3f029d3c6d62068d59301d90c18dbde8ee402107 (diff) | |
| download | lwn-00aec93d10a051ea64f83eff75d4065a19508ea6.tar.gz lwn-00aec93d10a051ea64f83eff75d4065a19508ea6.zip | |
sched: Fully integrate cpus_active_map and root-domain code
Reflect "active" cpus in the rq->rd->online field, instead of
the online_map.
The motivation is that things that use the root-domain code
(such as cpupri) only care about cpus classified as "active"
anyway. By synchronizing the root-domain state with the active
map, we allow several optimizations.
For instance, we can remove an extra cpumask_and from the
scheduler hotpath by utilizing rq->rd->online (since it is now
a cached version of cpu_active_map & rq->rd->span).
Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Max Krasnyansky <maxk@qualcomm.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090730145723.25226.24493.stgit@dev.haskins.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_rt.c')
| -rw-r--r-- | kernel/sched_rt.c | 7 |
1 files changed, 0 insertions, 7 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index a8f89bc3e5eb..13f728ef5b38 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -1173,13 +1173,6 @@ static int find_lowest_rq(struct task_struct *task) return -1; /* No targets found */ /* - * Only consider CPUs that are usable for migration. - * I guess we might want to change cpupri_find() to ignore those - * in the first place. - */ - cpumask_and(lowest_mask, lowest_mask, cpu_active_mask); - - /* * At this point we have built a mask of cpus representing the * lowest priority tasks in the system. Now we want to elect * the best one based on our affinity and topology. |