* Mark Rutland <mark.rutl...@arm.com> wrote:
> > Could we please get this fixed so that proper dependencies are checked
> > and it's only regenerated when needed? This slowdown makes additive-build
> > kernel development quite painful, as ~5 seconds is in the 'too long'
> > category already, while 1.2 seconds is basically instantaneous.
>
> Just to check, are we happy to eat the full cost for the first build of a
> pristine tree?
No, not happy to add 3-4 seconds to a full build that usually takes less
than 60 seconds. This stuff isn't parallelized nor particularly well
optimized it appears.
This *must* get faster.
> One reason we do the check rather than (re-)generating the headers is
> that Linus requested [1] the generated header be committed so that they
> show up in git grep, but it looks like he was happy to be flexible on
> that.
I think the generated headers should be part of the commit space, the
grepping is important.
> If we're happy to not commit in the generated headers, and if we're happy to
> pay the cost for a pristine tree, that's fairly straightforward to do.
> Otherwise, this has to be an optional check.
Or faster code, or a different concept!
Thanks,
Ingo
