From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ilya Maximets <i.maximets@samsung.com>
Subject: Re: [PATCH RFC 2/4] vhost: make buf vector for scatter
	RX local.
Date: Fri, 19 Feb 2016 10:30:46 +0300
Message-ID: <56C6C4A6.2080507@samsung.com>
References: <1455863563-15751-1-git-send-email-i.maximets@samsung.com>
 <1455863563-15751-3-git-send-email-i.maximets@samsung.com>
 <20160219070650.GS21426@yliu-dev.sh.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Cc: dev@dpdk.org, Dyasly Sergey <s.dyasly@samsung.com>
To: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Return-path: <dev-bounces@dpdk.org>
Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com
 [210.118.77.11]) by dpdk.org (Postfix) with ESMTP id 22CACC3FA
 for <dev@dpdk.org>; Fri, 19 Feb 2016 08:30:49 +0100 (CET)
Received: from eucpsbgm1.samsung.com (unknown [203.254.199.244])
 by mailout1.w1.samsung.com
 (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014))
 with ESMTP id <0O2S0055GA7COY80@mailout1.w1.samsung.com> for dev@dpdk.org;
 Fri, 19 Feb 2016 07:30:48 +0000 (GMT)
In-reply-to: <20160219070650.GS21426@yliu-dev.sh.intel.com>
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On 19.02.2016 10:06, Yuanhan Liu wrote:
> On Fri, Feb 19, 2016 at 09:32:41AM +0300, Ilya Maximets wrote:
>> Array of buf_vector's is just an array for temporary storing information
>> about available descriptors. It used only locally in virtio_dev_merge_rx()
>> and there is no reason for that array to be shared.
>>
>> Fix that by allocating local buf_vec inside virtio_dev_merge_rx().
>>
>> Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
>> ---
>>  lib/librte_vhost/rte_virtio_net.h |  1 -
>>  lib/librte_vhost/vhost_rxtx.c     | 45 ++++++++++++++++++++-------------------
>>  2 files changed, 23 insertions(+), 23 deletions(-)
>>
>> diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h
>> index 10dcb90..ae1e4fb 100644
>> --- a/lib/librte_vhost/rte_virtio_net.h
>> +++ b/lib/librte_vhost/rte_virtio_net.h
>> @@ -91,7 +91,6 @@ struct vhost_virtqueue {
>>  	int			kickfd;			/**< Currently unused as polling mode is enabled. */
>>  	int			enabled;
>>  	uint64_t		reserved[16];		/**< Reserve some spaces for future extension. */
>> -	struct buf_vector	buf_vec[BUF_VECTOR_MAX];	/**< for scatter RX. */
>>  } __rte_cache_aligned;
> 
> I like this kind of cleanup, however, it breaks ABI.

Should I prepare version of this patch with field above marked as
deprecated and add note to doc/guides/rel_notes/release_16_04.rst
about future deletion?

Best regards, Ilya Maximets.