Garrett Cooper wrote:
> On Dec 20, 2010, at 11:31 PM, Bian Naimeng wrote:
> 
>> CAI Qian wrote:
>>>> Could you tell me which kernels are this test fit to?
>>> It is hard to tell. The old kernel might decide to back-port this feature.
>> I see.
>>
>> Would you like tell me what's the test required? 
>>
>> If the test is good, i think it should pass on old kernel which had back-port
>> this feature, otherwise the back-port procedure is incorrect.
> 
>       Yes, assuming features are tied to specific versions is a bad idea; a 
> lot of code in LTP does this in an effort to be correct as to when it was 
> first implemented, but it's wrong because there are various groups who may 
> have backported support for distro or product specific reasons :)...
> 
>>>> If there is old KSM interface, and this test can not work correctly on
>>>> it, i think we should fix the test, it should not do anything but reports
>>>> "This test is unsupported!"
>>> Anyway, it would be more code to test here and there rather than kernel 
>>> version. Isn't LTP's guideline to only support the latest and greatest 
>>> kernels?
> 
>       I wish. It would make life a lot easier, but that isn't the way that 
> things are today (esp the folks on here that are running ancient versions of 
> Redhat... *cough*)... and given that trying to track Linux changes is like 
> trying to forecast the weather, stuff is always changing -- for better or for 
> worse -- which makes it a pain for everyone else sitting out on the 
> sidelines, like LTP, because Linux kernel devs don't actively engage test 
> projects.
>       There isn't really a line drawn in the sand as far as what is and isn't 
> supported by LTP, except between 2.4 and 2.6 kernels, and even that is murky 
> in spots.

Yes.

However, many people use the LTP to test their own linux system, if those kernel
is not support KSM, at least we should make sure they can build successfully.

Regards
 Bian

> Thanks,
> -Garrett
> 

-- 
Regards
Bian Naimeng


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