[dpdk-dev] Eliminate config/rte_config.h?

[Bruce Richardson]

On Thu, Nov 12, 2020 at 03:39:10PM +0000, David Harton (dharton) wrote:
> Hi folks,
> 
> 
> 
> Been experimenting with DPDK 20.11 and the loss of the old "config"
> hierarchy.
> 
> 
> 
> I wonder if anyone considered eliminating config/rte_config.h in favor of
> a config/dpdk_conf that can contain the default values at the start of
> the file but can be overridden with values later in the file similar to
> how the old config files worked?
> 
> 
> 
> It just feels awkward to modify a versioned header file per build
> especially if multiple builds want to share the same repo but with
> different values specified in config/rte_config.h especially when
> "rte_build_config.h" is included at the very beginning of
> config/rte_config.h.
> 
> 
> 
> Thoughts?
> 
> Dave
> 

I'd personally be open to replacing it if we have a better solution. Are
there many values in it that you look to tune, because I believe the
general consensus is that we want to reduce the number of tunables we have
per DPDK build?  To that end our main concern should be having decent
defaults, and thereafter we can see about the best mechanism to allow easy
overriding for edge-cases.

Any early attempt at such a thing was tried [1], but unfortunately it had
issues so we need a new approach - possibly one as you had suggested.

/Bruce