[dpdk-dev] [PATCH] vhost: remove lockless enqueue to the virtio ring

[Xie, Huawei]

On 1/5/2016 2:42 PM, Xie, Huawei wrote:
> This patch removes the internal lockless enqueue implmentation.
> DPDK doesn't support receiving/transmitting packets from/to the same
> queue. Vhost PMD wraps vhost device as normal DPDK port. DPDK
> applications normally have their own lock implmentation when enqueue
> packets to the same queue of a port.
>
> The atomic cmpset is a costly operation. This patch should help
> performance a bit.
>
> Signed-off-by: Huawei Xie <huawei.xie at intel.com>
This patch modifies the API's behavior, which is also a trivial ABI
change. In my opinion, application shouldn't rely on previous behavior.
Anyway, i am checking how to declare the ABI change.