On 13-01-02 5:43 PM, Brian Smucker wrote:
I take everything back. The entry in the defconfig did the trick. My
problem was that the recipe was grabbing its defconfig from the wrong
directory, costing me much confusion.
So sorry for the false alarm. Thanks again for your help. When you said
the defconfig was a straight copy, the light finally dawned that there
was something else going on.
Aha! That is good news. Thanks for following up.
The silver lining to all this thrashing around for me was the fact that
I do understand the kernel bitbake process much better.
:) Always a good thing.
Bruce
Brian
On 1/2/2013 2:15 PM, Bruce Ashfield wrote:
On Wed, Jan 2, 2013 at 4:47 PM, Brian Smucker <b...@bsmucker.eu.org
<mailto:b...@bsmucker.eu.org>> wrote:
On 1/2/2013 1:12 PM, Bruce Ashfield wrote:
On 13-01-02 04:11 PM, Brian Smucker wrote:
On 1/2/2013 10:06 AM, Bruce Ashfield wrote:
> On 12-12-24 02:59 PM, Brian Smucker wrote:
>> Hi,
>>
>
> Catching up on email from the holidays. Did you ever get
an answer
> to this ?
Not yet, resumed my quest today.
>> I'm a yocto mostly-newbie, trying to find my way. I
have a custom
layer
>> that I am using to build a kernel. The layer right now
consists of a
few
>> kernel patches and a defconfig and is based on the
standard kernel
>> otherwise.
>>
>> When I do a diff on my defconfig and the bitbake
generated .config,
they
>> are quite similar, but the CONFIG_UNION_FS=y line
magically shows up.
>> I'm wondering where it comes from and how to disable it.
>
> CONFIG_UNION_FS is being enabled by the standard kernel
(and all
> kernels that inherit it). Since you are based on that
kernel, you
> get the option enabled.
>
>>
>> I can do a bitbake -c menuconfig virtual/kernel and
eliminate that
>> option giving me the kernel I want, but those changes
are gone after a
>> bitbake -c cleansstate ...
>
> Have you tried putting
>
> # CONFIG_UNION_FS is not set
>
> in your defconfig ? That should disable it.
>
I did try that, but that did not disable it.
Hmmm. It worked here. I'll run another test shortly (I'm
working on
3.8-rc1 at the moment).
So after much pain and thrashing about to figure things
out, now I see
that in the standard-nocfg.scc file, the unionfs feature
is set. This
file is found in the following path: tmp/work/..
../linux/meta/cfg/kernel-cache/ktypes/standard/ directory.
My current burning question is: Where is does this file
come from? It
does not seem to be part of the kernel git repository. I
can changes
this file and affect the kernel build, but again, those
changes are
transitory and do not persist after cleaning.
It's from the meta branch of the kernel git repository. Those
are all the fragments that are used to construct and configure
the kernel. Part of the build process makes them available to the
configuration phase.
As something else to try, call your file <foo>.cfg and add it
to the
SRC_URI the same way you added the defconfig. defconfig's get
special
processing, calling it <foo>.cfg will simply get your changes
added
to the end of the build and they teka precedence.
Tried your above suggestion, didn't seem to work.
So with a bit of further testing it looks like by the time the
defconfig and the <foo>.cfg are copied into the linux directory,
the commented out config option: # CONFIG_UNION_FS is not set
line is totally gone.
Interesting .. and not really possible if you are talking about the
version in $WORKDIR (i.e
the directory above the linux/ source directory). Those are straight
copies from your
layer, with zero processing. Same with the copy within the
linux/meta/cfg/* directory
structure, they are straight copies and are only processed after being
ordered and
concatenated.
That being said, if
a feature with a Kconfig of the kernel has a "select UNIONFS"
then you
can't override it with a config/defconfig option, you need to
patch
the kernel.
Not sure what you are saying here. If you mean that the unionfs
kernel option is required by another selected kernel config
option, I'm pretty sure that's not the case. I can bitbake -c
menuconfig virtual/kernel and merely deselect the unionfs option
and the kernel is good.
I can't see your source tree, so it was always an option. I know it
definitely isn't
the case in the linux-yocto tree. But the ability to deselect it in
menuconfig isn't
contingent on something else not selecting it from within another Kconfig.
Again, if you send me your defconfig and local.conf changes (for the
BSP), I'll
run a kernel configuration test and be able to easily tell you what is
happening.
Cheers,
Bruce
Brian
If you send me your defconfig, I can run some test builds here.
Bruce
Thanks,
Brian
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