forked from mirrors/linux
edb9382175
We want to centralize the isolation features, to be done by the housekeeping subsystem and scheduler domain isolation is a significant part of it. No intended behaviour change, we just reuse the housekeeping cpumask and core code. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Acked-by: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: Christoph Lameter <cl@linux.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Wanpeng Li <kernellwp@gmail.com> Link: http://lkml.kernel.org/r/1509072159-31808-11-git-send-email-frederic@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
51 lines
1.3 KiB
C
51 lines
1.3 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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};
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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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return smp_processor_id();
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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 true;
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}
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#endif /* _LINUX_SCHED_ISOLATION_H */
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