[PATCH vhost 05/17] virtio_ring: split: structure the indirect desc table

[Jason Wang]

On Tue, Jan 30, 2024 at 7:42 PM Xuan Zhuo <xuanzhuo at linux.alibaba.com> wrote:
>
> This commit structure the indirect desc table.
> Then we can get the desc num directly when doing unmap.
>
> And save the dma info to the struct, then the indirect
> will not use the dma fields of the desc_extra. The subsequent
> commits will make the dma fields are optional. But for
> the indirect case, we must record the dma info.
>
> Signed-off-by: Xuan Zhuo <xuanzhuo at linux.alibaba.com>
> ---
>  drivers/virtio/virtio_ring.c | 86 ++++++++++++++++++++++--------------
>  1 file changed, 52 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index 2b41fdbce975..831667a57429 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -67,9 +67,16 @@
>  #define LAST_ADD_TIME_INVALID(vq)
>  #endif

[...]

> +               kfree(in_desc);
>                 vq->split.desc_state[head].indir_desc = NULL;
> -

Unnecessary changes.

Thanks


>         }
>
>         vq->split.desc_extra[i].next = vq->free_head;
> --
> 2.32.0.3.g01195cf9f
>