[dpdk-dev] [PATCH] examples/vhost: fix port init failure in mergeable mode

[Maxime Coquelin]

On 11/5/21 08:32, Xia, Chenbo wrote:
> Hi Maxime,
> 
>> -----Original Message-----
>> From: dev <dev-bounces at dpdk.org> On Behalf Of Chenbo Xia
>> Sent: Thursday, November 4, 2021 1:11 PM
>> To: dev at dpdk.org
>> Cc: maxime.coquelin at redhat.com
>> Subject: [dpdk-dev] [PATCH] examples/vhost: fix port init failure in mergeable
>> mode
>>
>> When the example starts in mergeable mode with an i40e port,
>> it fails to launch because the examples use default mtu MAX_MTU
>> to configure ethdev. The root cause is some devices have Ethernet
>> frame overhead and then MAX_MTU will be larger than device's max
>> mtu, so the ethdev configure will fail.
>>
>> This patch checks the device's max mtu before setting the ethdev
>> configuration. If the device has a max mtu, use that value to
>> configure.
>>
>> Fixes: 1bb4a528c41f ("ethdev: fix max Rx packet length")
>>
>> Signed-off-by: Chenbo Xia <chenbo.xia at intel.com>
>> Reported-by: Xingguang He <xingguang.he at intel.com>
>> ---
> 
> I see a unit test failure on this patch, but I think this patch should not cause
> issues in unit test, could you help me confirm it?

I can confirm, mcslock_autotest is not related to your change, and it 
seems other patches are facing the same issue, eg:
https://lab.dpdk.org/results/dashboard/patchsets/19997/

Maxime

> Thanks,
> Chenbo
>