From: Shannon Nelson Date: Sat, 7 Mar 2020 01:04:03 +0000 (-0800) Subject: ionic: improve irq numa locality X-Git-Tag: v5.7-rc1~146^2~214^2~5 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b7f55b81f2ac40e52c5a56e22c80488eac531c91;p=thirdparty%2Fkernel%2Flinux.git ionic: improve irq numa locality 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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 1b7e18fe83dbd..7df49b433ae5c 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 {