Re: [PATCH] Revert kheaders feature

[Joel Fernandes]

On Wed, Feb 5, 2020 at 8:02 AM Joel Fernandes <joel@xxxxxxxxxxxxxxxxx> wrote:
>
> On Wed, Feb 05, 2020 at 03:46:29PM +0000, Greg Kroah-Hartman wrote:
> > Now that BPF does not need a copy of the kernel headers anymore in order
> > to build programs, there's no real need for putting the kernel headers
> > into a kernel module.  So drop the feature quick, before someone starts
> > using it :)
>
> Temporary Nack. Adding Alexei to the thread.
>
> I believe at the time of this going in, the BPF's BTF feature was not fully
> ready or able to support the usecases. Especially because BPF programs can
> call or use macros in kernel headers as well.
>
> Also, now BCC project does depend on this and so does bpftrace. Have both
> of these tools migrated to use BTF and don't need CONFIG_KHEADERS to be
> compiled? Sorry if I lost track.
>

Sorry to call it CONFIG_KHEADERS, obviously I mean CONFIG_IKHEADERS.

thanks,

 - Joel