Commit f73493eb authored Jan 05, 2019 by Helge Deller

parisc: Improve initial IRQ to CPU assignment



On parisc, each IRQ can only be handled by one CPU, and currently CPU0
is choosen as default for handling all IRQs by default.
With this patch we now assign each requested IRQ to one of the online
CPUs (and thus distribute the IRQs across all CPUs), even without an
instance of irqbalance running.

Signed-off-by: Helge Deller <deller@gmx.de>

parent b102f29b

arch/parisc/kernel/irq.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -117,6 +117,9 @@ int cpu_check_affinity(struct irq_data d, const struct cpumask dest)
		return -EINVAL;

		/* whatever mask they set, we just allow one CPU */
		cpu_dest = cpumask_next_and(d->irq & (num_online_cpus()-1),
		dest, cpu_online_mask);
		if (cpu_dest >= nr_cpu_ids)
		cpu_dest = cpumask_first_and(dest, cpu_online_mask);

		return cpu_dest;

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