diff options
| author | Vasundhara Volam | 2017-08-28 19:40:27 +0200 |
|---|---|---|
| committer | David S. Miller | 2017-08-29 01:57:09 +0200 |
| commit | 56f0fd80d1886479a42ac07ed239538eb145a669 (patch) | |
| tree | 59f657e1c3ca392d745c9dd17a1d4bf6cee39711 /drivers/net/ethernet/broadcom/bnxt/bnxt.c | |
| parent | bnxt_en: Improve tx ring reservation logic. (diff) | |
| download | kernel-qcow2-linux-56f0fd80d1886479a42ac07ed239538eb145a669.tar.gz kernel-qcow2-linux-56f0fd80d1886479a42ac07ed239538eb145a669.tar.xz kernel-qcow2-linux-56f0fd80d1886479a42ac07ed239538eb145a669.zip | |
bnxt_en: assign CPU affinity hints to bnxt_en IRQs
This patch provides hints to irqbalance to map bnxt_en device IRQs
to specific CPU cores. cpumask_local_spread() 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: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/broadcom/bnxt/bnxt.c')
| -rw-r--r-- | drivers/net/ethernet/broadcom/bnxt/bnxt.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c index 4b0a80721c89..9657bfbeb816 100644 --- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c +++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c @@ -49,6 +49,7 @@ #include <linux/aer.h> #include <linux/bitmap.h> #include <linux/cpu_rmap.h> +#include <linux/cpumask.h> #include "bnxt_hsi.h" #include "bnxt.h" @@ -5554,8 +5555,15 @@ static void bnxt_free_irq(struct bnxt *bp) for (i = 0; i < bp->cp_nr_rings; i++) { irq = &bp->irq_tbl[i]; - if (irq->requested) + if (irq->requested) { + if (irq->have_cpumask) { + irq_set_affinity_hint(irq->vector, NULL); + free_cpumask_var(irq->cpu_mask); + irq->have_cpumask = 0; + } free_irq(irq->vector, bp->bnapi[i]); + } + irq->requested = 0; } } @@ -5588,6 +5596,21 @@ static int bnxt_request_irq(struct bnxt *bp) break; irq->requested = 1; + + if (zalloc_cpumask_var(&irq->cpu_mask, GFP_KERNEL)) { + int numa_node = dev_to_node(&bp->pdev->dev); + + irq->have_cpumask = 1; + cpumask_set_cpu(cpumask_local_spread(i, numa_node), + irq->cpu_mask); + rc = irq_set_affinity_hint(irq->vector, irq->cpu_mask); + if (rc) { + netdev_warn(bp->dev, + "Set affinity failed, IRQ = %d\n", + irq->vector); + break; + } + } } return rc; } |