Re: [PATCH 1/3] [net/9p] Fix the size of receive buffer packing onto VirtIO ring.

["Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>]

On Thu, 30 Jun 2011 16:18:39 -0700, "Venkateswararao Jujjuri (JV)" <jvrao@linux.vnet.ibm.com> wrote:
> Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
> ---
>  net/9p/trans_virtio.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
> index 244e707..0ec5423 100644
> --- a/net/9p/trans_virtio.c
> +++ b/net/9p/trans_virtio.c
> @@ -367,7 +367,7 @@ req_retry_pinned:
>  		in += inp;
>  	} else {
>  		in = pack_sg_list(chan->sg, out, VIRTQUEUE_NUM, rdata,
> -				client->msize);
> +				req->rc->capacity);
>  	}
> 
>  	err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc);

So when will req->rc->capacity be different from client->msize ? Can we
get details for that documented in p9_tag_alloc ?

The above pack_sg_list will only be called for non-zero copy case ? In
that case won't client->size be same as rc->capacity ?

-aneesh