netdev - Re: [PATCH net-next 7/8] vhost_net: try batch dequing from skb array

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Message-ID: <674632255.8752546.1490784387956.JavaMail.zimbra@redhat.com>
Date:   Wed, 29 Mar 2017 06:46:27 -0400 (EDT)
From:   Pankaj Gupta <pagupta@...hat.com>
To:     Jason Wang <jasowang@...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

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? 

> 
> Thanks
>