From: Shannon Nelson snelson@pensando.io
[ Upstream commit b7f55b81f2ac40e52c5a56e22c80488eac531c91 ]
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 Stable-dep-of: abfb2a58a537 ("ionic: remove WARN_ON to prevent panic_on_warn") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/pensando/ionic/ionic_lif.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index d0841836cf705..975cda9377ec4 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -418,8 +418,9 @@ 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 {