5a28e00796
Timers should not be queued on isolated cpus. Instead try to find other cpus to queue timer on. Change-Id: I7a1a8aade8630226d7349cc37afd1a3abe48fc67 Signed-off-by: Olav Haugan <ohaugan@codeaurora.org> [satyap@codeaurora.org: Port to 4.19 by moving changes needed from include/linux/tick.h to include/linux/sched/isolation.h] Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
#ifndef _LINUX_SCHED_ISOLATION_H
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#define _LINUX_SCHED_ISOLATION_H
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#include <linux/cpumask.h>
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#include <linux/init.h>
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#include <linux/tick.h>
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enum hk_flags {
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HK_FLAG_TIMER = 1,
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HK_FLAG_RCU = (1 << 1),
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HK_FLAG_MISC = (1 << 2),
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HK_FLAG_SCHED = (1 << 3),
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HK_FLAG_TICK = (1 << 4),
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HK_FLAG_DOMAIN = (1 << 5),
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HK_FLAG_WQ = (1 << 6),
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};
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#ifdef CONFIG_CPU_ISOLATION
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DECLARE_STATIC_KEY_FALSE(housekeeping_overriden);
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extern int housekeeping_any_cpu(enum hk_flags flags);
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extern const struct cpumask *housekeeping_cpumask(enum hk_flags flags);
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extern void housekeeping_affine(struct task_struct *t, enum hk_flags flags);
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extern bool housekeeping_test_cpu(int cpu, enum hk_flags flags);
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extern void __init housekeeping_init(void);
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#else
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static inline int housekeeping_any_cpu(enum hk_flags flags)
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{
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cpumask_t available;
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int cpu;
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cpumask_andnot(&available, cpu_online_mask, cpu_isolated_mask);
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cpu = cpumask_any(&available);
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if (cpu >= nr_cpu_ids)
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cpu = smp_processor_id();
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return cpu;
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}
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static inline const struct cpumask *housekeeping_cpumask(enum hk_flags flags)
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{
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return cpu_possible_mask;
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}
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static inline void housekeeping_affine(struct task_struct *t,
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enum hk_flags flags) { }
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static inline void housekeeping_init(void) { }
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#endif /* CONFIG_CPU_ISOLATION */
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static inline bool housekeeping_cpu(int cpu, enum hk_flags flags)
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{
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#ifdef CONFIG_CPU_ISOLATION
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if (static_branch_unlikely(&housekeeping_overriden))
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return housekeeping_test_cpu(cpu, flags);
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#endif
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return !cpu_isolated(cpu);
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}
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#endif /* _LINUX_SCHED_ISOLATION_H */
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