be2net: assign CPU affinity hints to be2net IRQs
This patch provides hints to irqbalance to map be2net IRQs to
specific CPU cores. cpumask_set_cpu_local_first() is used, which first
maps IRQs to near NUMA cores; when those cores are exhausted, IRQs are
mapped to far NUMA cores.
Signed-off-by: Padmanabh Ratnakar <padmanabh.ratnakar@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index eb39673..a2fe1f3 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -30,6 +30,7 @@
#include <linux/firmware.h>
#include <linux/slab.h>
#include <linux/u64_stats_sync.h>
+#include <linux/cpumask.h>
#include "be_hw.h"
#include "be_roce.h"
@@ -183,6 +184,7 @@
u16 spurious_intr;
struct napi_struct napi;
struct be_adapter *adapter;
+ cpumask_var_t affinity_mask;
#ifdef CONFIG_NET_RX_BUSY_POLL
#define BE_EQ_IDLE 0
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index d8df78b..3541207 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -2342,6 +2342,7 @@
napi_hash_del(&eqo->napi);
netif_napi_del(&eqo->napi);
}
+ free_cpumask_var(eqo->affinity_mask);
be_queue_free(adapter, &eqo->q);
}
}
@@ -2357,6 +2358,11 @@
adapter->cfg_num_qs);
for_all_evt_queues(adapter, eqo, i) {
+ if (!zalloc_cpumask_var(&eqo->affinity_mask, GFP_KERNEL))
+ return -ENOMEM;
+ cpumask_set_cpu_local_first(i, dev_to_node(&adapter->pdev->dev),
+ eqo->affinity_mask);
+
netif_napi_add(adapter->netdev, &eqo->napi, be_poll,
BE_NAPI_WEIGHT);
napi_hash_add(&eqo->napi);
@@ -3028,6 +3034,8 @@
status = request_irq(vec, be_msix, 0, eqo->desc, eqo);
if (status)
goto err_msix;
+
+ irq_set_affinity_hint(vec, eqo->affinity_mask);
}
return 0;
@@ -3072,7 +3080,7 @@
{
struct net_device *netdev = adapter->netdev;
struct be_eq_obj *eqo;
- int i;
+ int i, vec;
if (!adapter->isr_registered)
return;
@@ -3084,8 +3092,11 @@
}
/* MSIx */
- for_all_evt_queues(adapter, eqo, i)
- free_irq(be_msix_vec_get(adapter, eqo), eqo);
+ for_all_evt_queues(adapter, eqo, i) {
+ vec = be_msix_vec_get(adapter, eqo);
+ irq_set_affinity_hint(vec, NULL);
+ free_irq(vec, eqo);
+ }
done:
adapter->isr_registered = false;