diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-02-05 20:15:22 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-02-27 21:54:04 +0300 |
| commit | fb5e31d970ce8b4941f03ed765d7dbefc39f22d9 (patch) | |
| tree | f7b64532549f35aad0933fae46346e59151d3a71 /drivers/scsi/virtio_scsi.c | |
| parent | 52a61516125fa9a21b3bdf4f90928308e2e5573f (diff) | |
| download | linux-fb5e31d970ce8b4941f03ed765d7dbefc39f22d9.tar.xz | |
virtio: allow drivers to request IRQ affinity when creating VQs
Add a struct irq_affinity pointer to the find_vqs methods, which if set
is used to tell the PCI layer to create the MSI-X vectors for our I/O
virtqueues with the proper affinity from the start. Compared to after
the fact affinity hints this gives us an instantly working setup and
allows to allocate the irq descritors node-local and avoid interconnect
traffic. Last but not least this will allow blk-mq queues are created
based on the interrupt affinity for storage drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/scsi/virtio_scsi.c')
| -rw-r--r-- | drivers/scsi/virtio_scsi.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index c680d7641311..c9c5ea0611e9 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -941,7 +941,8 @@ static int virtscsi_init(struct virtio_device *vdev, } /* Discover virtqueues and write information to configuration. */ - err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names); + err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names, + NULL); if (err) goto out; |