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: Thu, 18 Dec 2014 00:47:16 +0100 [thread overview]
Message-ID: <7354113.GC7lWJkY43@xps13> (raw)
In-Reply-To: <1589451.jCIKiaz4qv@xps13>
2014-12-17 11:04, Thomas Monjalon:
> 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.
Applied with this log change "turn off by default in some drivers"
Thanks
--
Thomas
prev parent reply other threads:[~2014-12-17 23:47 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
2014-12-17 23:47 ` Thomas Monjalon [this message]
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