Re: [PATCH v7 13/13] virtio-blk: use BDRV_REQ_REGISTERED_BUF optimization hint

[Stefano Garzarella]

On Thu, Oct 13, 2022 at 02:59:08PM -0400, Stefan Hajnoczi wrote:
> Register guest RAM using BlockRAMRegistrar and set the
> BDRV_REQ_REGISTERED_BUF flag so block drivers can optimize memory
> accesses in I/O requests.
>
> This is for vdpa-blk, vhost-user-blk, and other I/O interfaces that rely
> on DMA mapping/unmapping.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
> include/hw/virtio/virtio-blk.h |  2 ++
> hw/block/virtio-blk.c          | 39 ++++++++++++++++++++++------------
> 2 files changed, 27 insertions(+), 14 deletions(-)

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>