[yocto] Yocto 2.2 minimum kernel requirement

[Khem Raj]

> On Oct 31, 2016, at 2:59 PM, Paul Eggleton <paul.eggleton at linux.intel.com> wrote:
> 
> On Mon, 31 Oct 2016 09:37:07 Khem Raj wrote:
>>> On Oct 31, 2016, at 7:37 AM, Vuille, Martin (Martin) <vmartin at avaya.com>
>>> wrote:
>>> 
>>> We are looking at upgrading from Yocto 1.8 to 2.2.
>>> 
>>> Yocto 2.2 has a minimum kernel requirement of 3.2.0.
>>> 
>>> This isn’t an issue for our target (ARMv5, Linux 4.4) but may be
>>> an issue for our automated build machines (x86, Linux 2.6.32—CentOS 6.)
>>> 
>>> However, there is a note that says
>>> “For x86 and x86_64, you can reset OLDEST_KERNEL
>>> <http://www.yoctoproject.org/docs/2.2/mega-manual/mega-manual.html#var-OL
>>> DEST_KERNEL> to anything down to 2.6.32 if desired.”
>>> 
>>> Is it possible to configure things such that we can keep supporting the
>>> old kernel for the SDK while we support a more up-to-date kernel for the
>>> target?
>> 
>> I think that should be the default. We do not set it for x86/nativesdk case.
>> File a ticket if thats not the case.
> 
> SDK_OLDEST_KERNEL is the variable that's supposed to be controlling this, but
> I noticed a couple of weeks ago that we aren't feeding SDK_OLDEST_KERNEL into
> glibc for nativesdk, so we should fix that - I've filed a bug [1] and will
> sort that out. I think we should probably set the SDK_OLDEST_KERNEL default
> for x86 to 2.6.32 at the same time - I assume there are no objections?

Yes, its for nativesdk/glibc, I think for target x86 we should keep 3.2

> 
> Cheers,
> Paul
> 
> [1] https://bugzilla.yoctoproject.org/show_bug.cgi?id=10561
> 
> --
> 
> Paul Eggleton
> Intel Open Source Technology Centre

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