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

[Chris Tapp]

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 ?

> 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
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> 
> 
> 
> -- 
> "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