2014-12-17 00:51, Ouyang, Changchun: > From: Thomas Monjalon [mailto:thomas.monjalon at 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 at 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
