[ptxdist] Differences between kernel config in ptxdist directory and the real kernel source directory

[ptxdist] Differences between kernel config in ptxdist directory and the real kernel source directory

[Matthias Klein]

Hello,

our kernelconfig stays in the bsp directory at 
configs/platform-xxx/kernelconfig-version.
We have an out of bsp git tree for the kernel sources which is linked to 
local_src/kernel.xxx.

Under which conditions get the config file transferd from bsp dir to 
kernel dir, and from kernel dir to bsp dir?

I had a big problem where I had in the bsp a 3.12.15 config with preempt 
rt enabled, but an 3.12.19 config without preempt rt in
the kernel directory, and I don't understand how this can happen ... 
(The kernel version is 3.12.19)

I was thinking that ptxdist copy the config, calls "make oldconfig", and 
copy the result back into the bsp.


Does it makes a difference for the kernel config handling that is is an 
git tree instead of xz archive in the bsp?


Thanks a lot for some tips!


Best regards,

Matthias


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Re: [ptxdist] Differences between kernel config in ptxdist directory and the real kernel source directory

[Michael Olbrich]

Hi,

On Fri, Jun 13, 2014 at 11:11:38AM +0200, Matthias Klein wrote:
> our kernelconfig stays in the bsp directory at
> configs/platform-xxx/kernelconfig-version.
> We have an out of bsp git tree for the kernel sources which is
> linked to local_src/kernel.xxx.
> 
> Under which conditions get the config file transferd from bsp dir to
> kernel dir, and from kernel dir to bsp dir?
> 
> I had a big problem where I had in the bsp a 3.12.15 config with
> preempt rt enabled, but an 3.12.19 config without preempt rt in
> the kernel directory, and I don't understand how this can happen ...
> (The kernel version is 3.12.19)
> 
> I was thinking that ptxdist copy the config, calls "make oldconfig",
> and copy the result back into the bsp.
> 
> 
> Does it makes a difference for the kernel config handling that is is
> an git tree instead of xz archive in the bsp?

During kernel.prepare the config is copied from the BSP to the kernel
source tree.
At the end of 'ptxdist menuconfig kernel' or 'ptxdist oldconfig kernel' it
is copied back, so you need to explicitly do this after changing the
kernel code.

Regards
Michael

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Re: [ptxdist] Differences between kernel config in ptxdist directory and the real kernel source directory

[Matthias Klein]

Am 13.06.2014 16:13, schrieb Michael Olbrich:
> Hi,
>
> On Fri, Jun 13, 2014 at 11:11:38AM +0200, Matthias Klein wrote:
>> our kernelconfig stays in the bsp directory at
>> configs/platform-xxx/kernelconfig-version.
>> We have an out of bsp git tree for the kernel sources which is
>> linked to local_src/kernel.xxx.
>>
>> Under which conditions get the config file transferd from bsp dir to
>> kernel dir, and from kernel dir to bsp dir?
>>
>> I had a big problem where I had in the bsp a 3.12.15 config with
>> preempt rt enabled, but an 3.12.19 config without preempt rt in
>> the kernel directory, and I don't understand how this can happen ...
>> (The kernel version is 3.12.19)
>>
>> I was thinking that ptxdist copy the config, calls "make oldconfig",
>> and copy the result back into the bsp.
>>
>>
>> Does it makes a difference for the kernel config handling that is is
>> an git tree instead of xz archive in the bsp?
> During kernel.prepare the config is copied from the BSP to the kernel
> source tree.
> At the end of 'ptxdist menuconfig kernel' or 'ptxdist oldconfig kernel' it
> is copied back, so you need to explicitly do this after changing the
> kernel code.
>
> Regards
> Michael
>
Thanks a lot for the information !

Best regards,
Matthias


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