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Date: Fri, 10 Aug 2018 00:48:18 +0000
From: "Gonglei (Arei)" <arei.gonglei@...wei.com>
To: Caleb Raitto <caleb.raitto@...il.com>,
"herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
"mst@...hat.com" <mst@...hat.com>,
"davem@...emloft.net" <davem@...emloft.net>
CC: "jasowang@...hat.com" <jasowang@...hat.com>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
Caleb Raitto <caraitto@...gle.com>
Subject: RE: [PATCH net-next 1/2] virtio_net: Make vp_set_vq_affinity() take
a mask.
> -----Original Message-----
> From: Caleb Raitto [mailto:caleb.raitto@...il.com]
> Sent: Friday, August 10, 2018 8:29 AM
> To: herbert@...dor.apana.org.au; mst@...hat.com; davem@...emloft.net
> Cc: Gonglei (Arei) <arei.gonglei@...wei.com>; jasowang@...hat.com;
> netdev@...r.kernel.org; linux-crypto@...r.kernel.org; Caleb Raitto
> <caraitto@...gle.com>
> Subject: [PATCH net-next 1/2] virtio_net: Make vp_set_vq_affinity() take a
> mask.
>
> From: Caleb Raitto <caraitto@...gle.com>
>
> Make vp_set_vq_affinity() take a cpumask instead of taking a single CPU.
>
> If there are fewer queues than cores, queue affinity should be able to
> map to multiple cores.
>
Nice work. Maybe you'd better rename this patch's header
s/virtio_net/virtio/ ?
Except that:
Acked-by: Gongle <arei.gonglei@...wei.com>
Regards,
-Gonglei
> Link: https://patchwork.ozlabs.org/patch/948149/
> Suggested-by: Willem de Bruijn <willemb@...gle.com>
> Signed-off-by: Caleb Raitto <caraitto@...gle.com>
> ---
> drivers/crypto/virtio/virtio_crypto_core.c | 4 ++--
> drivers/net/virtio_net.c | 8 ++++----
> drivers/virtio/virtio_pci_common.c | 7 +++----
> drivers/virtio/virtio_pci_common.h | 2 +-
> include/linux/virtio_config.h | 7 ++++---
> 5 files changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/crypto/virtio/virtio_crypto_core.c
> b/drivers/crypto/virtio/virtio_crypto_core.c
> index 83326986c113..7c7198553699 100644
> --- a/drivers/crypto/virtio/virtio_crypto_core.c
> +++ b/drivers/crypto/virtio/virtio_crypto_core.c
> @@ -146,7 +146,7 @@ static void virtcrypto_clean_affinity(struct
> virtio_crypto *vi, long hcpu)
>
> if (vi->affinity_hint_set) {
> for (i = 0; i < vi->max_data_queues; i++)
> - virtqueue_set_affinity(vi->data_vq[i].vq, -1);
> + virtqueue_set_affinity(vi->data_vq[i].vq, NULL);
>
> vi->affinity_hint_set = false;
> }
> @@ -173,7 +173,7 @@ static void virtcrypto_set_affinity(struct virtio_crypto
> *vcrypto)
> *
> */
> for_each_online_cpu(cpu) {
> - virtqueue_set_affinity(vcrypto->data_vq[i].vq, cpu);
> + virtqueue_set_affinity(vcrypto->data_vq[i].vq, cpumask_of(cpu));
> if (++i >= vcrypto->max_data_queues)
> break;
> }
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 39a7f4452587..43fabc0eb4d2 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -1878,8 +1878,8 @@ static void virtnet_clean_affinity(struct virtnet_info
> *vi, long hcpu)
>
> if (vi->affinity_hint_set) {
> for (i = 0; i < vi->max_queue_pairs; i++) {
> - virtqueue_set_affinity(vi->rq[i].vq, -1);
> - virtqueue_set_affinity(vi->sq[i].vq, -1);
> + virtqueue_set_affinity(vi->rq[i].vq, NULL);
> + virtqueue_set_affinity(vi->sq[i].vq, NULL);
> }
>
> vi->affinity_hint_set = false;
> @@ -1905,8 +1905,8 @@ static void virtnet_set_affinity(struct virtnet_info
> *vi)
> for_each_online_cpu(cpu) {
> const unsigned long *mask = cpumask_bits(cpumask_of(cpu));
>
> - virtqueue_set_affinity(vi->rq[i].vq, cpu);
> - virtqueue_set_affinity(vi->sq[i].vq, cpu);
> + virtqueue_set_affinity(vi->rq[i].vq, cpumask_of(cpu));
> + virtqueue_set_affinity(vi->sq[i].vq, cpumask_of(cpu));
> __netif_set_xps_queue(vi->dev, mask, i, false);
> i++;
> }
> diff --git a/drivers/virtio/virtio_pci_common.c
> b/drivers/virtio/virtio_pci_common.c
> index 705aebd74e56..465a6f5142cc 100644
> --- a/drivers/virtio/virtio_pci_common.c
> +++ b/drivers/virtio/virtio_pci_common.c
> @@ -421,7 +421,7 @@ const char *vp_bus_name(struct virtio_device *vdev)
> * - OR over all affinities for shared MSI
> * - ignore the affinity request if we're using INTX
> */
> -int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
> +int vp_set_vq_affinity(struct virtqueue *vq, const struct cpumask *cpu_mask)
> {
> struct virtio_device *vdev = vq->vdev;
> struct virtio_pci_device *vp_dev = to_vp_device(vdev);
> @@ -435,11 +435,10 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
> if (vp_dev->msix_enabled) {
> mask = vp_dev->msix_affinity_masks[info->msix_vector];
> irq = pci_irq_vector(vp_dev->pci_dev, info->msix_vector);
> - if (cpu == -1)
> + if (!cpu_mask)
> irq_set_affinity_hint(irq, NULL);
> else {
> - cpumask_clear(mask);
> - cpumask_set_cpu(cpu, mask);
> + cpumask_copy(mask, cpu_mask);
> irq_set_affinity_hint(irq, mask);
> }
> }
> diff --git a/drivers/virtio/virtio_pci_common.h
> b/drivers/virtio/virtio_pci_common.h
> index 135ee3cf7175..02271002c2f3 100644
> --- a/drivers/virtio/virtio_pci_common.h
> +++ b/drivers/virtio/virtio_pci_common.h
> @@ -141,7 +141,7 @@ const char *vp_bus_name(struct virtio_device *vdev);
> * - OR over all affinities for shared MSI
> * - ignore the affinity request if we're using INTX
> */
> -int vp_set_vq_affinity(struct virtqueue *vq, int cpu);
> +int vp_set_vq_affinity(struct virtqueue *vq, const struct cpumask
> *cpu_mask);
>
> const struct cpumask *vp_get_vq_affinity(struct virtio_device *vdev, int
> index);
>
> diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> index 5559a2d31c46..32baf8e26735 100644
> --- a/include/linux/virtio_config.h
> +++ b/include/linux/virtio_config.h
> @@ -79,7 +79,8 @@ struct virtio_config_ops {
> u64 (*get_features)(struct virtio_device *vdev);
> int (*finalize_features)(struct virtio_device *vdev);
> const char *(*bus_name)(struct virtio_device *vdev);
> - int (*set_vq_affinity)(struct virtqueue *vq, int cpu);
> + int (*set_vq_affinity)(struct virtqueue *vq,
> + const struct cpumask *cpu_mask);
> const struct cpumask *(*get_vq_affinity)(struct virtio_device *vdev,
> int index);
> };
> @@ -236,11 +237,11 @@ const char *virtio_bus_name(struct virtio_device
> *vdev)
> *
> */
> static inline
> -int virtqueue_set_affinity(struct virtqueue *vq, int cpu)
> +int virtqueue_set_affinity(struct virtqueue *vq, const struct cpumask
> *cpu_mask)
> {
> struct virtio_device *vdev = vq->vdev;
> if (vdev->config->set_vq_affinity)
> - return vdev->config->set_vq_affinity(vq, cpu);
> + return vdev->config->set_vq_affinity(vq, cpu_mask);
> return 0;
> }
>
> --
> 2.18.0.597.ga71716f1ad-goog
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