34 lines
859 B
C
34 lines
859 B
C
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/*
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* Housekeeping management. Manage the targets for routine code that can run on
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* any CPU: unbound workqueues, timers, kthreads and any offloadable work.
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*
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* Copyright (C) 2017 Red Hat, Inc., Frederic Weisbecker
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*
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*/
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#include <linux/sched/isolation.h>
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#include <linux/tick.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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cpumask_var_t housekeeping_mask;
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void __init housekeeping_init(void)
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{
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if (!tick_nohz_full_enabled())
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return;
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if (!alloc_cpumask_var(&housekeeping_mask, GFP_KERNEL)) {
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WARN(1, "NO_HZ: Can't allocate not-full dynticks cpumask\n");
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cpumask_clear(tick_nohz_full_mask);
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tick_nohz_full_running = false;
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return;
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}
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cpumask_andnot(housekeeping_mask,
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cpu_possible_mask, tick_nohz_full_mask);
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/* We need at least one CPU to handle housekeeping work */
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WARN_ON_ONCE(cpumask_empty(housekeeping_mask));
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}
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