Re: [dpdk-dev] [PATCH] vhost: Fix the vhost broken issue

["Ouyang, Changchun" <changchun.ouyang@intel.com>]

Hi Thomas,

If HuaweiXie's patch set for vhost library and new vhost sample could be applied into dpdk.org very soon,
Then this patch could be depressed/superseded, I think his patch can fix this issue.
Otherwise, this patch could be high priority as the vhost is broken in the tip code due to recent commit related to mbuf change.

Thanks and regards, 
Changchun

> -----Original Message-----
> From: Ouyang, Changchun
> Sent: Monday, October 13, 2014 3:40 PM
> To: dev@dpdk.org
> Cc: Cao, Waterman; Ouyang, Changchun
> Subject: [PATCH] vhost: Fix the vhost broken issue
> 
> As the vhost sample is broken by the following commit,
>   commit 08b563ffb19d8baf59dd84200f25bc85031d18a7
>   Author: Olivier Matz <olivier.matz@6wind.com>
>   Date:   Thu Sep 11 14:15:35 2014 +0100
>   mbuf: replace data pointer by an offset
> 
> It leads to segment fault error in vhost when binding a virtio device MAC
> address to its corresponding VMDq pool by executing command line 'start tx-
> first' in test-pmd on guest.
> 
> This patch fixes that issue.
> 
> Signed-off-by: Changchun Ouyang <changchun.ouyang@intel.com>
> ---
>  examples/vhost/main.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/examples/vhost/main.c b/examples/vhost/main.c index
> 9cf8e20..a6db607 100644
> --- a/examples/vhost/main.c
> +++ b/examples/vhost/main.c
> @@ -1782,6 +1782,7 @@ virtio_dev_tx(struct virtio_net* dev, struct
> rte_mempool *mbuf_pool)
>  		/* Setup dummy mbuf. This is copied to a real mbuf if
> transmitted out the physical port. */
>  		m.data_len = desc->len;
>  		m.pkt_len = desc->len;
> +		m.buf_addr = (void *)(uintptr_t)buff_addr;
>  		m.data_off = 0;
> 
>  		PRINT_PACKET(dev, (uintptr_t)buff_addr, desc->len, 0);
> --
> 1.8.4.2