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Date: Wed, 29 Mar 2017 18:53:27 +0800 From: Jason Wang <jasowang@...hat.com> To: Pankaj Gupta <pagupta@...hat.com> Cc: "Michael S. Tsirkin" <mst@...hat.com>, kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH net-next 7/8] vhost_net: try batch dequing from skb array On 2017年03月29日 18:46, Pankaj Gupta wrote: > Hi Jason, > >> On 2017年03月23日 13:34, Jason Wang wrote: >>> >>>>> +{ >>>>> + if (rvq->rh != rvq->rt) >>>>> + goto out; >>>>> + >>>>> + rvq->rh = rvq->rt = 0; >>>>> + rvq->rt = skb_array_consume_batched_bh(rvq->rx_array, rvq->rxq, >>>>> + VHOST_RX_BATCH); >>>> A comment explaining why is is -bh would be helpful. >>> Ok. >>> >>> Thanks >> Rethink about this. It looks like -bh is not needed in this case since >> no consumer run in bh. > In that case do we need other variants of "ptr_ring_consume_batched_*()" functions. > Are we planning to use them in future? I think we'd better keep them, since it serves as helpers. You can see that not all the helpers in ptr_ring has real users, but they were prepared for the future use. Thanks > >> Thanks >>
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