Re: [dpdk-dev] [PATCH 05/17] net/virtio: don't dump split virtqueue data

[Tiwei Bie <tiwei.bie@intel.com>]

On Fri, Mar 16, 2018 at 04:21:08PM +0100, Jens Freimann wrote:
> VIRTQUEUE_DUMP access split virtqueue data which is not
> correct when packed virtqueues are used.
> 
> Signed-off-by: Jens Freimann <jfreimann@redhat.com>
> ---
>  drivers/net/virtio/virtqueue.h | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
> index cc2e7c0..82160ca 100644
> --- a/drivers/net/virtio/virtqueue.h
> +++ b/drivers/net/virtio/virtqueue.h
> @@ -359,7 +359,9 @@ struct virtio_tx_region {
>  }
>  
>  #ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
> -#define VIRTQUEUE_DUMP(vq) do { \
> +#define VIRTQUEUE_DUMP(vq) \
> +	do { \
> +	if (vtpci_packed_queue((vq)->hw)) break; \

Maybe it's better to make VIRTQUEUE_DUMP() support packed ring.

Thanks

>  	uint16_t used_idx, nused; \
>  	used_idx = (vq)->vq_ring.used->idx; \
>  	nused = (uint16_t)(used_idx - (vq)->vq_used_cons_idx); \
> -- 
> 1.8.3.1
>