From: Shannon Nelson <snelson@xxxxxxxxxxx>
[ 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@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: abfb2a58a537 ("ionic: remove WARN_ON to prevent panic_on_warn")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 {
--
2.39.2
