DPDK patches and discussions
 help / color / mirror / Atom feed
From: Tiwei Bie <tiwei.bie@intel.com>
To: Kevin Traynor <ktraynor@redhat.com>
Cc: yliu@fridaylinux.org, maxime.coquelin@redhat.com, dev@dpdk.org,
	antonio.fischetti@intel.com, stable@dpdk.org, "Kavanagh,
	Mark B" <mark.b.kavanagh@intel.com>
Subject: Re: [dpdk-dev] [PATCH 1/5] net/virtio: fix vector Rx break caused by rxq flushing
Date: Fri, 8 Dec 2017 10:30:34 +0800	[thread overview]
Message-ID: <20171208023034.4f5u3fujmupraaia@debian-xvivbkq> (raw)
In-Reply-To: <9407e2ce-8b2b-9a9d-a493-1757609184a9@redhat.com>

On Thu, Dec 07, 2017 at 04:00:57PM +0000, Kevin Traynor wrote:
> On 12/07/2017 05:30 AM, Tiwei Bie wrote:
> > The vector Rx will be broken if backend has consumed all
> > the descs in the avail ring before the device is started.
> > Because in current implementation, vector Rx will return
> > immediately without refilling the avail ring if the used
> > ring is empty. So we have to refill the avail ring after
> > flushing the elements in the used ring for vector Rx.
> > 
> > Besides, vector Rx has a different ring layout assumption
> > and mbuf management. So we need to handle it differently.
> > 
> 
> Hi Tiwei, does the issue only occur with the vector rx? How about if the
> simple rx is used because VIRTIO_NET_F_MRG_RXBUF is set?

Hi Kevin,

Yes, you are right! The issue only occurs with the vector
Rx. The vector Rx (i.e. the simple Rx) won't be used if
VIRTIO_NET_F_MRG_RXBUF is set.

Best regards,
Tiwei Bie

  reply	other threads:[~2017-12-08  2:31 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-07  5:30 [dpdk-dev] [PATCH 0/5] various fixes and cleanups for virtio PMD Tiwei Bie
2017-12-07  5:30 ` [dpdk-dev] [PATCH 1/5] net/virtio: fix vector Rx break caused by rxq flushing Tiwei Bie
2017-12-07  9:14   ` Maxime Coquelin
2017-12-07  9:30     ` Fischetti, Antonio
2017-12-07 18:10       ` Fischetti, Antonio
2017-12-07 16:00   ` Kevin Traynor
2017-12-08  2:30     ` Tiwei Bie [this message]
2017-12-08 10:17       ` Kevin Traynor
2017-12-07  5:30 ` [dpdk-dev] [PATCH 2/5] net/virtio: fix typo in LRO support Tiwei Bie
2017-12-07  9:15   ` Maxime Coquelin
2017-12-07  5:30 ` [dpdk-dev] [PATCH 3/5] net/virtio: remove a redundant macro definition for ctrl vq Tiwei Bie
2017-12-07  9:16   ` Maxime Coquelin
2017-12-07  5:30 ` [dpdk-dev] [PATCH 4/5] net/virtio: remove redundant macro definitions for vector Rx Tiwei Bie
2017-12-07  9:18   ` Maxime Coquelin
2017-12-07 10:39     ` Tiwei Bie
2017-12-07  5:30 ` [dpdk-dev] [PATCH 5/5] net/virtio: squeeze repeated blank lines Tiwei Bie
2017-12-07  9:22   ` Maxime Coquelin
2017-12-07 10:32     ` Tiwei Bie
2017-12-11  5:13 ` [dpdk-dev] [PATCH v2 0/4] various fixes and cleanups for virtio PMD Tiwei Bie
2017-12-11  5:13   ` [dpdk-dev] [PATCH v2 1/4] net/virtio: fix vector Rx break caused by rxq flushing Tiwei Bie
2017-12-11  5:13   ` [dpdk-dev] [PATCH v2 2/4] net/virtio: fix typo in LRO support Tiwei Bie
2017-12-11  5:13   ` [dpdk-dev] [PATCH v2 3/4] net/virtio: remove a redundant macro definition for ctrl vq Tiwei Bie
2017-12-11  5:13   ` [dpdk-dev] [PATCH v2 4/4] net/virtio: remove redundant macro definitions for vector Rx Tiwei Bie
2017-12-27 14:46   ` [dpdk-dev] [PATCH v2 0/4] various fixes and cleanups for virtio PMD Yuanhan Liu

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=20171208023034.4f5u3fujmupraaia@debian-xvivbkq \
    --to=tiwei.bie@intel.com \
    --cc=antonio.fischetti@intel.com \
    --cc=dev@dpdk.org \
    --cc=ktraynor@redhat.com \
    --cc=mark.b.kavanagh@intel.com \
    --cc=maxime.coquelin@redhat.com \
    --cc=stable@dpdk.org \
    --cc=yliu@fridaylinux.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).