From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ferruh Yigit <ferruh.yigit@intel.com>
Subject: Re: [PATCH] net/sfc: enable TSO by default
Date: Fri, 20 Jan 2017 14:47:27 +0000
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To: Andrew Rybchenko <arybchenko@solarflare.com>,
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On 1/20/2017 2:37 PM, Andrew Rybchenko wrote:
> On 01/20/2017 05:29 PM, Thomas Monjalon wrote:
>> 2017-01-19 15:52, Andrew Rybchenko:
>>> Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
>>> ---
>>> It is a mistake that TSO support is compiled out by default.
>>> We would be happy to enable it by deafult, but strictly speaking
>>> it is not a bug fix.
>>>
>>> Arguments to enable are:
>>>  - be more feature-rich (and user-friendly) in default config
>>>  - the most of internal testing is done with TSO enabled
>>>
>>>  config/common_base | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/config/common_base b/config/common_base
>>> index b9fb8e2..134e9b9 100644
>>> --- a/config/common_base
>>> +++ b/config/common_base
>>> @@ -261,7 +261,7 @@ CONFIG_RTE_LIBRTE_BNXT_PMD=y
>>>  #
>>>  CONFIG_RTE_LIBRTE_SFC_EFX_PMD=y
>>>  CONFIG_RTE_LIBRTE_SFC_EFX_DEBUG=n
>>> -CONFIG_RTE_LIBRTE_SFC_EFX_TSO=n
>>> +CONFIG_RTE_LIBRTE_SFC_EFX_TSO=y
>> There should not be such option in the build-time configuration.
>> Why keeping it (even enabled by default)?
> 
> Initially it was introduced since packet rates with TSO compiled out
> were slightly but noticeable better. Finally we have changed approach
> and performance improvements planned in 17.05 do not require it.
> I'll be happy to remove it completely, if there is no problems to
> include it in 17.02 (it will be a bit bigger but functionally equal to
> this one).

If it will be just removing ifdef, with keeping same functionality, I
wouldn't mind bigger patch.