sched: Fully integrate cpus_active_map and root-domain code

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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>

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This commit is contained in:

Gregory Haskins 2009-07-30 10:57:23 -04:00 • committed by Ingo Molnar

parent 3f029d3c6d

commit 00aec93d10

3 changed files with 8 additions and 11 deletions

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2

kernel/sched.c

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10

kernel/sched_fair.c

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7

kernel/sched_rt.c

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