From: "Zhang, Yuying" <yuying.zhang@intel.com>
To: David Marchand <david.marchand@redhat.com>
Cc: dev <dev@dpdk.org>, Maxime Coquelin <maxime.coquelin@redhat.com>,
"Xia, Chenbo" <chenbo.xia@intel.com>,
dpdk stable <stable@dpdk.org>
Subject: RE: [PATCH v1] net/vhost: clear data of packet mbuf after sending pkts
Date: Tue, 1 Mar 2022 09:02:49 +0000 [thread overview]
Message-ID: <DM6PR11MB3516AF1D34F327FEFAC4BABD8E029@DM6PR11MB3516.namprd11.prod.outlook.com> (raw)
In-Reply-To: <CAJFAV8wtShAeacbN-pjSTKw289qObJy8YxbV2fq_X8wpRoQ2qw@mail.gmail.com>
Hi Marchand,
> -----Original Message-----
> From: David Marchand <david.marchand@redhat.com>
> Sent: Tuesday, March 1, 2022 4:44 PM
> To: Zhang, Yuying <yuying.zhang@intel.com>
> Cc: dev <dev@dpdk.org>; Maxime Coquelin <maxime.coquelin@redhat.com>;
> Xia, Chenbo <chenbo.xia@intel.com>; dpdk stable <stable@dpdk.org>
> Subject: Re: [PATCH v1] net/vhost: clear data of packet mbuf after sending pkts
>
> On Tue, Mar 1, 2022 at 8:29 AM Yuying Zhang <yuying.zhang@intel.com> wrote:
> >
> > The PMD frees a packet mbuf back into its original mempool after
> > sending a packet. However, old data is not cleaned up which causes
> > error in payload of new packets. This patch clear data of packet mbuf
> > before freeing mbuf.
>
> This patch looks wrong to me.
> What is the actual issue you want to fix?
eth_vhost_tx() frees the packet mbuf back into its original mempool every time after a packet sent without clearing the data field.
Then packet transmit function will get bulk directly without reset. New generated packet contains old data of previous packet. This is wrong.
>
>
> --
> David Marchand
next prev parent reply other threads:[~2022-03-01 9:02 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-01 7:28 Yuying Zhang
2022-03-01 8:38 ` Ling, WeiX
2022-03-01 8:43 ` David Marchand
2022-03-01 9:02 ` Zhang, Yuying [this message]
2022-03-01 9:47 ` David Marchand
2022-03-01 17:05 ` Stephen Hemminger
2022-03-02 8:58 ` Zhang, Yuying
2022-03-03 6:49 ` Xia, Chenbo
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=DM6PR11MB3516AF1D34F327FEFAC4BABD8E029@DM6PR11MB3516.namprd11.prod.outlook.com \
--to=yuying.zhang@intel.com \
--cc=chenbo.xia@intel.com \
--cc=david.marchand@redhat.com \
--cc=dev@dpdk.org \
--cc=maxime.coquelin@redhat.com \
--cc=stable@dpdk.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).