* Mark Rutland <mark.rutland@xxxxxxx> 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
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