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sched: Reduce some allocation pressure 

Since we now allocate SD_LV_MAX * nr_cpu_ids sched_domain/sched_group
structures when rebuilding the scheduler toplogy it might make sense
to shrink that depending on the CONFIG_ options.

This is only needed until we get rid of SD_LV_* alltogether and
provide a full dynamic topology interface.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20110407122942.406226449@chello.nl
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-04-07 14:09:53 +02:00 committed by Ingo Molnar
parent a6c75f2f8d
commit 3859173d43
1 changed files with 8 additions and 0 deletions
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8
include/linux/sched.h
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@ -897,12 +897,20 @@ static inline struct cpumask *sched_group_cpus(struct sched_group *sg)
enum sched_domain_level {
SD_LV_NONE = 0,
#ifdef CONFIG_SCHED_SMT
SD_LV_SIBLING,
#endif
#ifdef CONFIG_SCHED_MC
SD_LV_MC,
#endif
#ifdef CONFIG_SCHED_BOOK
SD_LV_BOOK,
#endif
SD_LV_CPU,
#ifdef CONFIG_NUMA
SD_LV_NODE,
SD_LV_ALLNODES,
#endif
SD_LV_MAX
};