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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2020-08-18 15:33:48 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-08-27 08:29:13 -0400 |
| commit | a4eef0711b2cf7a7476c3e2c202a414b68a1baa0 (patch) | |
| tree | faab55d185ae4aff1ce2d2dd9ba31b2b77ee5722 /include/hw/virtio/vhost-user-blk.h | |
| parent | 9445e1e15e66c19e42bea942ba810db28052cd05 (diff) | |
| download | qemu-a4eef0711b2cf7a7476c3e2c202a414b68a1baa0.zip | |
vhost-user-blk-pci: default num_queues to -smp N
Automatically size the number of request virtqueues to match the number
of vCPUs. This 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>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20200818143348.310613-8-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include/hw/virtio/vhost-user-blk.h')
| -rw-r--r-- | include/hw/virtio/vhost-user-blk.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/virtio/vhost-user-blk.h b/include/hw/virtio/vhost-user-blk.h index 34ad6f0c0e..292d17147c 100644 --- a/include/hw/virtio/vhost-user-blk.h +++ b/include/hw/virtio/vhost-user-blk.h @@ -25,6 +25,8 @@ #define VHOST_USER_BLK(obj) \ OBJECT_CHECK(VHostUserBlk, (obj), TYPE_VHOST_USER_BLK) +#define VHOST_USER_BLK_AUTO_NUM_QUEUES UINT16_MAX + typedef struct VHostUserBlk { VirtIODevice parent_obj; CharBackend chardev; |