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16b269436b
Currently, cpudl::free_cpus contains all CPUs during init, see cpudl_init(). When calling cpudl_find(), we have to add rd->span to avoid selecting the cpu outside the current root domain, because cpus_allowed cannot be depended on when performing clustered scheduling using the cpuset, see find_later_rq(). This patch adds cpudl_set_freecpu() and cpudl_clear_freecpu() for changing cpudl::free_cpus when doing rq_online_dl()/rq_offline_dl(), so we can avoid the rd->span operation when calling cpudl_find() in find_later_rq(). Signed-off-by: Xunlei Pang <pang.xunlei@linaro.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/1421642980-10045-1-git-send-email-pang.xunlei@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
32 lines
668 B
C
32 lines
668 B
C
#ifndef _LINUX_CPUDL_H
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#define _LINUX_CPUDL_H
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#include <linux/sched.h>
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#define IDX_INVALID -1
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struct cpudl_item {
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u64 dl;
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int cpu;
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int idx;
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};
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struct cpudl {
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raw_spinlock_t lock;
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int size;
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cpumask_var_t free_cpus;
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struct cpudl_item *elements;
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};
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#ifdef CONFIG_SMP
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int cpudl_find(struct cpudl *cp, struct task_struct *p,
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struct cpumask *later_mask);
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void cpudl_set(struct cpudl *cp, int cpu, u64 dl, int is_valid);
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int cpudl_init(struct cpudl *cp);
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void cpudl_set_freecpu(struct cpudl *cp, int cpu);
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void cpudl_clear_freecpu(struct cpudl *cp, int cpu);
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void cpudl_cleanup(struct cpudl *cp);
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#endif /* CONFIG_SMP */
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#endif /* _LINUX_CPUDL_H */
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