[poky] workflow - kernel config

[Richard Purdie]

On Fri, 2011-11-04 at 15:15 -0400, Bruce Ashfield wrote:
> On Fri, Nov 4, 2011 at 1:23 PM, Robert Berger
> <gmane at reliableembeddedsystems.com> wrote:
> > Hi,
> >
> > I'm playing with poky-edison-6.0 and the default 2.6.37.6 kernel on a
> > beagle board with core-image-sato-sdk.
> >
> > Interestingly enough there is user space support e.g. for oprofile, but
> > oprofile is not configured in the kernel.
> >
> > The same for lacencytop and powertop,...
> 
> We have feature descriptions for all of the above as components in the
> linux-yocto
> kernel repository, but they do need to be turned on and tested on a per board
> basis.
> 
> We can trigger kernel options based on userspace packages being enabled or
> disabled, but that still wouldn't be a guarantee that they'd work. The
> options that
> are within the tree are a documentation of what has actually been tested.
> 
> The 2.6.37 tree was a transition point,and we've continued standardizing the
> options and feature set in the later kernels. For yocto 1.2 we'll have a better
> defined and consistent set of feature blocks. It's a building process
> and we move
> forward.
> 
> As others will point out there are other/deeper beagle board BSPs and layers
> (i.e. meta-texasinstruments) that likely already have support for these options\
> (but I haven't checked recently), so that's an avenue to explore as well.
> 
> >
> > So I was wondering what's the preferred workflow to start with the
> > "yocto-default" kernel config and add kernel configuration options
> > afterwards.
> >
> > What's I've tried so far is:
> >
> > bitbake virtual/kernel -c clean
> > bitbake virtual/kernel -c configure
> > bitbake virtual/kernel -c menuconfig
> > bitbake virtual/kernel -c compile
> > bitbake virtual/kernel -c deploy
> 
> This is one flow that will work to make changes to the default kernel, and
> test them on a board. I use something like:
> 
>  bitbake -f -c configure linux-yocto
>  bitbake -f -c menuconfig
>  bitbake -c linux-yocto

I suspect you mean:

bitbake -f -c configure linux-yocto
bitbake -f -c menuconfig
bitbake linux-yocto

:)

Cheers,

Richard