workqueue: respect isolated cpus when queueing an unbound work
Initialize wq_unbound_cpumask to exclude cpus that were isolated by the cmdline's isolcpus parameter. Signed-off-by: Tal Shorer <tal.shorer@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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@ -4980,6 +4980,10 @@ int workqueue_set_unbound_cpumask(cpumask_var_t cpumask)
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if (!zalloc_cpumask_var(&saved_cpumask, GFP_KERNEL))
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return -ENOMEM;
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/*
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* Not excluding isolated cpus on purpose.
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* If the user wishes to include them, we allow that.
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*/
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cpumask_and(cpumask, cpumask, cpu_possible_mask);
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if (!cpumask_empty(cpumask)) {
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apply_wqattrs_lock();
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@ -5579,7 +5583,7 @@ int __init workqueue_init_early(void)
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WARN_ON(__alignof__(struct pool_workqueue) < __alignof__(long long));
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BUG_ON(!alloc_cpumask_var(&wq_unbound_cpumask, GFP_KERNEL));
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cpumask_copy(wq_unbound_cpumask, cpu_possible_mask);
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cpumask_andnot(wq_unbound_cpumask, cpu_possible_mask, cpu_isolated_map);
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pwq_cache = KMEM_CACHE(pool_workqueue, SLAB_PANIC);
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