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To: Charlie Li <charlie.li@gmail.com>
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From: "Tan, Jianfeng" <jianfeng.tan@intel.com>
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Date: Mon, 29 Aug 2016 13:29:37 +0800
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Subject: Re: [dpdk-users] Why testpmd fails to start in VM while l2fwd works
 in the same VM?
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These flags are used to compose the configuration, which will be passed 
as parameter to rte_dev_configure(). And by default in testpmd, hw-vlan 
is enabled, which is not supported by virtio device but can be supported 
by other hardware devices.

Thanks,
Jianfeng


On 8/27/2016 1:58 AM, Charlie Li wrote:
> Thanks Jianfeng,
>
> After adding " --txqflags=0xf00 --disable-hw-vlan", testpmd starts to 
> work for me.
>
> My follow-up is question is -
>
> Why these flags are required in the VM  while not required in the host?
>
> Regards,
> Charlie
>
> On Fri, Aug 26, 2016 at 4:55 AM, Tan, Jianfeng <jianfeng.tan@intel.com 
> <mailto:jianfeng.tan@intel.com>> wrote:
>
>     Hi Charlie,
>
>     > -----Original Message-----
>     > From: users [mailto:users-bounces@dpdk.org
>     <mailto:users-bounces@dpdk.org>] On Behalf Of Charlie Li
>     > Sent: Friday, August 26, 2016 1:28 AM
>     > To: users@dpdk.org <mailto:users@dpdk.org>
>     > Subject: [dpdk-users] Why testpmd fails to start in VM while
>     l2fwd works in
>     > the same VM?
>     >
>     > Hi All,
>     >
>     > My host and VM both are running Fedora 23.
>     >
>     > In the host, DPDK (testpmd, l2fwd and l3fwd) works fine.
>     >
>     > Then I set up OVS with DPDK and pass two (dpdkvhostuser) ports
>     to the VM.
>     >
>     > In the VM, l2fwd works fine, but testpmd fails to start. Pleas
>     see the
>     > attached screenshot of the VM with error messages.
>
>     I do not know how to run testpmd. Just a hint, you need to add "
>     --txqflags=0xf00 --disable-hw-vlan" when starting testpmd.
>
>     Thanks,
>     Jianfeng
>
>     >
>     > Has anybody seen similar issue in the VM?
>     >
>     > Thanks,
>     >
>     > Charlie
>
>