netdev.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Michael S. Tsirkin" <mst@redhat.com>
To: Jason Wang <jasowang@redhat.com>
Cc: Pankaj Gupta <pagupta@redhat.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, virtualization@lists.linux-foundation.org
Subject: Re: [PATCH net-next 7/8] vhost_net: try batch dequing from skb array
Date: Thu, 30 Mar 2017 00:47:33 +0300	[thread overview]
Message-ID: <20170330004654-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <cea3d380-389e-d258-915a-3d4f60232535@redhat.com>

On Wed, Mar 29, 2017 at 06:53:27PM +0800, Jason Wang wrote:
> 
> 
> 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

Makes sense for basic building blocks but I'm not sure we
need to do it for all APIs.


> > 
> > > Thanks
> > > 
_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization

  reply	other threads:[~2017-03-29 21:47 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-21  4:04 [PATCH net-next 0/8] vhost-net rx batching Jason Wang
2017-03-21  4:04 ` [PATCH net-next 1/8] ptr_ring: introduce batch dequeuing Jason Wang
2017-03-21 10:25   ` Sergei Shtylyov
2017-03-22  3:16     ` Jason Wang
2017-03-22 13:43   ` Michael S. Tsirkin
2017-03-23  5:33     ` Jason Wang
2017-03-21  4:04 ` [PATCH net-next 2/8] skb_array: " Jason Wang
2017-03-21  4:04 ` [PATCH net-next 3/8] tun: export skb_array Jason Wang
2017-03-21  4:04 ` [PATCH net-next 4/8] tap: " Jason Wang
2017-03-21  4:04 ` [PATCH net-next 5/8] tun: support receiving skb through msg_control Jason Wang
2017-03-21  4:04 ` [PATCH net-next 6/8] tap: support receiving skb from msg_control Jason Wang
2017-03-21  4:04 ` [PATCH net-next 7/8] vhost_net: try batch dequing from skb array Jason Wang
2017-03-22 14:16   ` Michael S. Tsirkin
2017-03-23  5:34     ` Jason Wang
2017-03-29  9:58       ` Jason Wang
2017-03-29 10:46         ` Pankaj Gupta
2017-03-29 10:53           ` Jason Wang
2017-03-29 21:47             ` Michael S. Tsirkin [this message]
2017-03-21  4:04 ` [PATCH net-next 8/8] vhost_net: use lockless peeking for skb array during busy polling Jason Wang
2017-03-29 12:07   ` Michael S. Tsirkin
2017-03-30  2:16     ` Jason Wang
2017-03-30  2:33       ` Michael S. Tsirkin
2017-03-30  3:53         ` Jason Wang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170330004654-mutt-send-email-mst@kernel.org \
    --to=mst@redhat.com \
    --cc=jasowang@redhat.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=pagupta@redhat.com \
    --cc=virtualization@lists.linux-foundation.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).