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authorStefan Hajnoczi <stefanha@redhat.com>2020-08-18 15:33:46 +0100
committerMichael S. Tsirkin <mst@redhat.com>2020-08-27 08:29:13 -0400
commit6a558822849fab604a1fcb71e7c4e528cafa21d9 (patch)
treebaeec7fcfa10f0b0ff3a3290c614453adc0f5e02 /linux-headers
parent4e5163bd844429711b4d60d51030ab83048d80cd (diff)
virtio-scsi-pci: default num_queues to -smp N
Automatically size the number of virtio-scsi-pci, vhost-scsi-pci, and vhost-user-scsi-pci request virtqueues to match the number of vCPUs. Other transports continue to default to 1 request virtqueue. A 1:1 virtqueue:vCPU mapping ensures that completion interrupts are handled on the same vCPU that submitted the request. No IPI is necessary to complete an I/O request and performance is improved. The maximum number of MSI-X vectors and virtqueues limit are respected. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20200818143348.310613-6-stefanha@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'linux-headers')
0 files changed, 0 insertions, 0 deletions