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vhost: fix retrieval of numa node in driver

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After some testing, it was found that retrieving numa information
about a vhost device via a call to get_mempolicy is more
accurate when performed during the new_device callback versus
the vring_state_changed callback, in particular upon initial boot
of the VM.  Performing this check during new_device is also
potentially more efficient as this callback is only triggered once
during device initialisation, compared with vring_state_changed
which may be called multiple times depending on the number of
queues assigned to the device.

Reorganise the code to perform this check and assign the correct
socket_id to the device during the new_device callback.

Fixes: ee584e9710 ("vhost: add driver on top of the library")

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
This commit is contained in:
Ciara Loftus 2016-04-05 17:09:47 +01:00 committed by Thomas Monjalon
parent a7e88f1782
commit 0d9eb479e9
1 changed files with 14 additions and 14 deletions
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28
drivers/net/vhost/rte_eth_vhost.c
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@ -229,6 +229,9 @@ new_device(struct virtio_net *dev)
struct pmd_internal *internal;
struct vhost_queue *vq;
unsigned i;
#ifdef RTE_LIBRTE_VHOST_NUMA
int newnode, ret;
#endif
if (dev == NULL) {
RTE_LOG(INFO, PMD, "Invalid argument\n");
@ -244,6 +247,17 @@ new_device(struct virtio_net *dev)
eth_dev = list->eth_dev;
internal = eth_dev->data->dev_private;
#ifdef RTE_LIBRTE_VHOST_NUMA
ret = get_mempolicy(&newnode, NULL, 0, dev,
MPOL_F_NODE | MPOL_F_ADDR);
if (ret < 0) {
RTE_LOG(ERR, PMD, "Unknown numa node\n");
return -1;
}
eth_dev->data->numa_node = newnode;
#endif
for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
vq = eth_dev->data->rx_queues[i];
if (vq == NULL)
@ -352,9 +366,6 @@ vring_state_changed(struct virtio_net *dev, uint16_t vring, int enable)
struct rte_vhost_vring_state *state;
struct rte_eth_dev *eth_dev;
struct internal_list *list;
#ifdef RTE_LIBRTE_VHOST_NUMA
int newnode, ret;
#endif
if (dev == NULL) {
RTE_LOG(ERR, PMD, "Invalid argument\n");
@ -370,17 +381,6 @@ vring_state_changed(struct virtio_net *dev, uint16_t vring, int enable)
eth_dev = list->eth_dev;
/* won't be NULL */
state = vring_states[eth_dev->data->port_id];
#ifdef RTE_LIBRTE_VHOST_NUMA
ret = get_mempolicy(&newnode, NULL, 0, dev,
MPOL_F_NODE | MPOL_F_ADDR);
if (ret < 0) {
RTE_LOG(ERR, PMD, "Unknown numa node\n");
return -1;
}
eth_dev->data->numa_node = newnode;
#endif
rte_spinlock_lock(&state->lock);
state->cur[vring] = enable;
state->max_vring = RTE_MAX(vring, state->max_vring);