[yocto] Meta Intel / Cedartrail / Denzil - how to get unionfs in the kernel

[Bruce Ashfield]

On Mon, Oct 8, 2012 at 3:58 AM, Chris Tapp <opensource at keylevel.com> wrote:
> On 7 Oct 2012, at 22:41, Bruce Ashfield wrote:
>
>> On Sun, Oct 7, 2012 at 6:08 PM, Chris Tapp <opensource at keylevel.com> wrote:
>>> On 7 Oct 2012, at 03:00, Saxena, Rahul wrote:
>>>
>>>> Try adding the unionfs feature (below) to your kernel:
>>>>
>>>> http://git.yoctoproject.org/cgit/cgit.cgi/linux-yocto-3.0/tree/meta/cfg/kernel-cache/features/unionfs?h=meta
>>>>
>>>> create a file my_cedartrail.scc with following line:
>>>> include features/unionfs/unionfs.scc
>>>>
>>>> put this file in a dir linux-yocto, the dir being created in
>>>>
>>>> meta-cedartrail/recipes-kernel/linux
>>>>
>>>> add following line in  meta-cedartrail/recipes-kernel/Linux/linux-yocto_3.0.bbappend
>>>>
>>>> SRC_URI +="file://my_cedartrail.scc"
>>>
>>> Thanks - I thought just running 'menuconfig' would allow me to enable it (for a quick test).
>>>
>>> However, this still doesn't seem to be working. I can see that 'my_cedartrail.scc' gets fetched in to the build area, but I still don't see CONFIG_UNION_FS if I run 'menuconfig'. There is also no 'unionfs' folder in fs/ of the build tree.
>>>
>>> Also, if I specify an invalid feature (e.g. feature2/unionfs/unionfs.scc) I'm not seeing any diagnostic.
>>
>> unionfs was never merged to the 3.0 kernel, I re-added it to the development
>> trees for 3.2 and the 3.4 kernel (aufs for the 3.6 tree at the moment). The meta
>> data is carried forward from the older kernels as a placeholder and is
>> documented
>> in the .scc file itself:
>>
>> -----------------------
>> kconf non-hardware unionfs.cfg
>>
>> # commented pending update to a newer version ported to 2.6.35+
>> # patch unionfs-2.5.4-integration.patch
>> -----------------------
>>
>> So to get unionfs in the 3.0 kernel, we'd need a port .. but since
>> we've moved on
>> quite a bit past 3.0, I don't know of any pending ports myself.
>
> Thanks Bruce.
>
> I guess I need to ask the Intel guys if there are any plans to move Cedartrail on from 3.0 ?

It will have to happen post yocto 1.3 (as far as I know), since the
3.0 kernel will be
dropped at that point.

For the short term, it's likely easier to backport/update unionfs than
it would be to
update the BSP .. but I can't speak for the time to be spent doing it :)

Cheers,

Bruce

>
>> Cheers,
>>
>> Bruce
>>
>>>
>>>>
>>>> -----Original Message-----
>>>> From: yocto-bounces at yoctoproject.org [mailto:yocto-bounces at yoctoproject.org] On Behalf Of Chris Tapp
>>>> Sent: Saturday, October 06, 2012 5:43 PM
>>>> To: yocto at yoctoproject.org Project
>>>> Subject: [yocto] Meta Intel / Cedartrail / Denzil - how to get unionfs in the kernel
>>>>
>>>> I' trying to enable unionfs in the 3.0.32 kernel for the cedartrail BSP under Denzil 7.0.1.
>>>>
>>>> However, the CONFIG_UNION_FS config flag isn't in the .config ...
>>>>
>>>> Is there something else I need to enable, or do I need to find another way?
>>>>
>>>> Chris Tapp
>>>>
>>>> opensource at keylevel.com
>>>> www.keylevel.com
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> yocto mailing list
>>>> yocto at yoctoproject.org
>>>> https://lists.yoctoproject.org/listinfo/yocto
>>>
>>> Chris Tapp
>>>
>>> opensource at keylevel.com
>>> www.keylevel.com
>>>
>>>
>>>
>>> _______________________________________________
>>> yocto mailing list
>>> yocto at yoctoproject.org
>>> https://lists.yoctoproject.org/listinfo/yocto
>>
>>
>>
>> --
>> "Thou shalt not follow the NULL pointer, for chaos and madness await
>> thee at its end"
>
> Chris Tapp
>
> opensource at keylevel.com
> www.keylevel.com
>
>
>



-- 
"Thou shalt not follow the NULL pointer, for chaos and madness await
thee at its end"