[dpdk-dev] [PATCH 03/21] vhost: protect virtio_net device struct

[Yuanhan Liu]

On Thu, Aug 31, 2017 at 11:50:05AM +0200, Maxime Coquelin wrote:
> virtio_net device might be accessed while being reallocated
> in case of NUMA awareness.

>From data path? data path won't be enabled until all are ready, which is
at a stage after numa_realloc(). Or, am I miss something?

	--yliu

> This case might be theoretical,
> but it will be needed anyway to protect vrings pages against
> invalidation.
> 
> The virtio_net devs are now protected with a readers/writers
> lock, so that before reallocating the device, it is ensured
> that it is not being referenced by the processing threads.
> 
> Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>