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Re: [Qemu-devel] [PATCH 2/5] virtio: increase VIRITO_QUEUE_MAX to 513
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH 2/5] virtio: increase VIRITO_QUEUE_MAX to 513 |
Date: |
Sun, 8 Feb 2015 11:51:01 +0100 |
On Fri, Feb 06, 2015 at 03:54:10PM +0800, Jason Wang wrote:
> Recent linux kernel supports up to 256 tap queues. Increase the limit
> to 513 (256 * 2 + 1(ctrl vq)).
>
> Signed-off-by: Jason Wang <address@hidden>
We have a bunch of loops over all possible VQ numbers in virtio pci.
Doing this for 1000 VQs when most of them are inactive seems extreme - I
suspect we need a list of active VQs now.
> ---
> include/hw/virtio/virtio.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
> index 220c09d..21bb30f 100644
> --- a/include/hw/virtio/virtio.h
> +++ b/include/hw/virtio/virtio.h
> @@ -92,7 +92,7 @@ typedef struct VirtQueueElement
> struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
> } VirtQueueElement;
>
> -#define VIRTIO_QUEUE_MAX 64
> +#define VIRTIO_QUEUE_MAX 513
>
> #define VIRTIO_NO_VECTOR 0xffff
>
> --
> 1.9.1
- [Qemu-devel] [PATCH 0/5] Support more virtio queues, Jason Wang, 2015/02/06
- [Qemu-devel] [PATCH 2/5] virtio: increase VIRITO_QUEUE_MAX to 513, Jason Wang, 2015/02/06
- [Qemu-devel] [PATCH 1/5] virtio: rename VIRTIO_PCI_QUEUE_MAX to VIRTIO_QUEUE_MAX, Jason Wang, 2015/02/06
- [Qemu-devel] [PATCH 3/5] virtio-net: fix the upper bound when trying to delete queues, Jason Wang, 2015/02/06
- [Qemu-devel] [PATCH 4/5] pci: remove hard-coded bar size in msix_init_exclusive_bar(), Jason Wang, 2015/02/06
- [Qemu-devel] [PATCH 5/5] virtio-pci: introduce auto_msix_bar_size property, Jason Wang, 2015/02/06
- Re: [Qemu-devel] [PATCH 0/5] Support more virtio queues, Stefan Hajnoczi, 2015/02/06