| Message ID | 20200307010408.65704-4-snelson@pensando.io |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | ionic updates | expand |
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 1b7e18fe83db..7df49b433ae5 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -424,8 +424,9 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type, 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 {
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> --- drivers/net/ethernet/pensando/ionic/ionic_lif.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)