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e4855fc90e
Make scx_select_cpu_dfl() more consistent with the other idle-related APIs by returning a negative value when an idle CPU isn't found. No functional changes, this is purely a refactoring. Signed-off-by: Andrea Righi <arighi@nvidia.com> Signed-off-by: Tejun Heo <tj@kernel.org>
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* BPF extensible scheduler class: Documentation/scheduler/sched-ext.rst
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*
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* Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
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* Copyright (c) 2022 Tejun Heo <tj@kernel.org>
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* Copyright (c) 2022 David Vernet <dvernet@meta.com>
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* Copyright (c) 2024 Andrea Righi <arighi@nvidia.com>
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*/
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#ifndef _KERNEL_SCHED_EXT_IDLE_H
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#define _KERNEL_SCHED_EXT_IDLE_H
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struct sched_ext_ops;
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#ifdef CONFIG_SMP
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void scx_idle_update_selcpu_topology(struct sched_ext_ops *ops);
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void scx_idle_init_masks(void);
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bool scx_idle_test_and_clear_cpu(int cpu);
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s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags);
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#else /* !CONFIG_SMP */
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static inline void scx_idle_update_selcpu_topology(struct sched_ext_ops *ops) {}
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static inline void scx_idle_init_masks(void) {}
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static inline bool scx_idle_test_and_clear_cpu(int cpu) { return false; }
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static inline s32 scx_pick_idle_cpu(const struct cpumask *cpus_allowed, int node, u64 flags)
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{
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return -EBUSY;
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}
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#endif /* CONFIG_SMP */
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s32 scx_select_cpu_dfl(struct task_struct *p, s32 prev_cpu, u64 wake_flags, u64 flags);
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void scx_idle_enable(struct sched_ext_ops *ops);
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void scx_idle_disable(void);
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int scx_idle_init(void);
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#endif /* _KERNEL_SCHED_EXT_IDLE_H */
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