Spreading the interrupts across the CPU cores is good for load
balancing, but not necessarily as good when using a CPU/core
that is not part of the NUMA local CPU. If it can be localized,
the kernel's cpumask_local_spread() service will pick a core
that is on the node close to the PCI device.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
ionic_intr_mask_assert(idev->intr_ctrl, new->intr.index,
IONIC_INTR_MASK_SET);
- new->intr.cpu = new->intr.index % num_online_cpus();
- if (cpu_online(new->intr.cpu))
+ new->intr.cpu = cpumask_local_spread(new->intr.index,
+ dev_to_node(dev));
+ if (new->intr.cpu != -1)
cpumask_set_cpu(new->intr.cpu,
&new->intr.affinity_mask);
} else {