Re: [PATCH] net/i40e: disable init and driver logs by default

["Lu, Wenzhuo" <wenzhuo.lu@intel.com>]

Hi Ferruh,

-----Original Message-----
From: Yigit, Ferruh 
Sent: Thursday, April 13, 2017 5:14 PM
To: Richardson, Bruce <bruce.richardson@intel.com>; Lu, Wenzhuo <wenzhuo.lu@intel.com>
Cc: Zhang, Helin <helin.zhang@intel.com>; Olivier Matz <olivier.matz@6wind.com>; dev@dpdk.org; Wu, Jingjing <jingjing.wu@intel.com>
Subject: Re: [dpdk-dev] [PATCH] net/i40e: disable init and driver logs by default

On 4/12/2017 11:02 AM, Bruce Richardson wrote:
> On Wed, Apr 12, 2017 at 04:12:18AM +0100, Lu, Wenzhuo wrote:
>> Hi,
>>
>>
>>> -----Original Message-----
>>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Zhang, Helin
>>> Sent: Friday, April 7, 2017 10:03 AM
>>> To: Richardson, Bruce
>>> Cc: Olivier Matz; dev@dpdk.org; Wu, Jingjing; Yigit, Ferruh
>>> Subject: Re: [dpdk-dev] [PATCH] net/i40e: disable init and driver 
>>> logs by default
>>>
>>>
>>>
>>>> -----Original Message-----
>>>> From: Richardson, Bruce
>>>> Sent: Thursday, April 6, 2017 10:37 PM
>>>> To: Zhang, Helin
>>>> Cc: Olivier Matz; dev@dpdk.org; Wu, Jingjing; Yigit, Ferruh
>>>> Subject: Re: [PATCH] net/i40e: disable init and driver logs by 
>>>> default
>>>>
>>>> On Thu, Apr 06, 2017 at 03:31:23PM +0100, Zhang, Helin wrote:
>>>>>
>>>>>
>>>>> -----Original Message-----
>>>>> From: Olivier Matz [mailto:olivier.matz@6wind.com]
>>>>> Sent: Thursday, April 6, 2017 10:17 PM
>>>>> To: dev@dpdk.org
>>>>> Cc: Zhang, Helin <helin.zhang@intel.com>; Wu, Jingjing 
>>>>> <jingjing.wu@intel.com>; Richardson, Bruce 
>>>>> <bruce.richardson@intel.com>; Yigit, Ferruh 
>>>>> <ferruh.yigit@intel.com>
>>>>> Subject: [PATCH] net/i40e: disable init and driver logs by default
>>>>>
>>>>> Since "net/i40e: use dynamic log type for control logs", the i40e 
>>>>> driver is
>>>> more verbose by default, which could result in testpmd being 
>>>> flooded by log messages in some conditions:
>>>>>
>>>>>   Checking link statuses...
>>>>>   i40e_dev_handle_aq_msg(): Request 2561 is not supported yet
>>>>>   i40e_dev_handle_aq_msg(): Request 2561 is not supported yet
>>>>>   i40e_dev_handle_aq_msg(): Request 2561 is not supported yet
>>>>>   i40e_dev_handle_aq_msg(): Request 2561 is not supported yet
>>>>>   Port 0 Link Up - speed 40000 Mbps - full-duplex
>>>>>   Port 1 Link Up - speed 40000 Mbps - full-duplex
>>>>>   Done
>>>>>   testpmd> i40e_dev_handle_aq_msg(): Request 4097 is not supported
>>> yet
>>>>>   i40e_dev_handle_aq_msg(): Request 4097 is not supported yet
>>>>>   i40e_dev_handle_aq_msg(): Request 4097 is not supported yet
>>>>>
>>>>> Fix this by disabling the dynamic logs by default. It is still 
>>>>> possible to enable
>>>> them at runtime.
>>>>>
>>>>> Fixes: c143e5a3d9e1 ("net/i40e: use dynamic log type for control
>>>>> logs")
>>>>>
>>>>> Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
>>>>> Acked-by: Helin Zhang <helin.zhang@intel.com>

<...>

>>>>
>>>> Hi Helin,
>>>>
>>>> Is this the correct fix? IMHO, if this is a problem, then we should 
>>>> surely not be hiding and ignoring the error. If it's not a problem, 
>>>> then the log level should be reduced to a lower level, e.g. INFO or NOTICE.
>>>>
>>>> Alternatively, this code could be modified to only print an error 
>>>> once for each unsupported request type.
>>>>
>>>> Ideally both solutions should be used, I think. I'm not sure I like 
>>>> setting the default log level to just show EMERG messages.
>>>>
>>>> Regards,
>>>> /Bruce
>>> Bruce, this is not a fix for the issue, which is under investigation 
>>> by developers now.
>>>
>>> For the by default log level, any guideline for that?
>>> I was OK with that changes, but not sure if there is any better choices.
>>
>> To my opinion, it's not appropriate to say something not supported is 
>> an error. How about fix this problem like,
>>
>> diff --git a/drivers/net/i40e/i40e_ethdev.c 
>> b/drivers/net/i40e/i40e_ethdev.c index 6927fde..91df587 100644
>> --- a/drivers/net/i40e/i40e_ethdev.c
>> +++ b/drivers/net/i40e/i40e_ethdev.c
>> @@ -5794,7 +5794,7 @@ struct i40e_vsi *
>>                         }
>>                         break;
>>                 default:
>> -                       PMD_DRV_LOG(ERR, "Request %u is not supported yet",
>> +                       PMD_DRV_LOG(DEBUG, "Request %u is not 
>> + supported yet",
>>                                     opcode);
>>                         break;
>>                 }
> 
> Ok to me.

> +1.

> Wenzhuo would you mind sending this as patch?
Sure. Will do.