From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: "Ouyang, Changchun" <changchun.ouyang@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] examples/vhost: Fix vlan offload issue
Date: Wed, 17 Dec 2014 11:04:25 +0100 [thread overview]
Message-ID: <1589451.jCIKiaz4qv@xps13> (raw)
In-Reply-To: <F52918179C57134FAEC9EA62FA2F96251194779C@shsmsx102.ccr.corp.intel.com>
2014-12-17 00:51, Ouyang, Changchun:
> From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> > 2014-12-12 12:15, Ouyang Changchun:
> > > The following commit break vm2vm hard mode test cases:
> > > commit db4014f2b65cb31bf209cadd5bcec778ca137fe2
> > > Author: Huawei Xie <huawei.xie@intel.com>
> > > Date: Thu Nov 13 06:34:07 2014 +0800
> > > examples/vhost: use factorized default Rx/Tx configuration
> > >
> > > Investigation show that it needs enabling vlan offload since it is
> > > turn off by default, and Tx need it, especially when vm2vm is in hard mode.
> >
> > I missed something here. Where VLAN offload is disabled by default?
> > Could you point the code, please?
>
> Inside the function ixgbe_dev_info_get()
> The txq_flags is assigned value of "ETH_TXQ_FLAGS_MULTISEGS|ETH_TXQ_FLAGS_NOOFFLOADS",
> The ETH_TXQ_FLAGS_NOOFFLOADS contain ETH_TXQ_FLAGS_NOVLANOFFL.
> so VLAN offload is disabled.
>
> Do you think any incorrect in my original description?
Yes. You say VLAN offload is turned off by default.
But it's the case only for ixgbe, i40e and vmxnet3.
--
Thomas
next prev parent reply other threads:[~2014-12-17 10:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-12 4:15 Ouyang Changchun
2014-12-12 6:00 ` Fu, JingguoX
2014-12-16 16:36 ` Thomas Monjalon
2014-12-17 0:51 ` Ouyang, Changchun
2014-12-17 10:04 ` Thomas Monjalon [this message]
2014-12-17 23:47 ` Thomas Monjalon
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