Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 27 Nov 2020 13:08:19 -0800 | Subject | Re: [GIT PULL 2/2] Kconfig updates for v5.10-rc1 |
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Just a quick note, because it's been a small annoyance for a while (I don't think it has anything to do with the 5.10 pull, I'm just responding to your latest pull request)..
I have "make allmodconfig" taking unnecessarily long, and I finally started asking myself "what's so expensive here". I'd expect it to be basically instantaneous on my machine, and it isn't.
And when I looked at it, I noticed that it re-compiled scripts/kconfig/conf every single time.
For no obvious reason I can see.
Doing a
make --trace allmodconfig
shows a series of
scripts/Makefile.host:112: target 'scripts/kconfig/....o' does not exist
lines, which is silly and wrong (they definitely exist), and I suspect it's due to some confusion about the build directory or similar.
It's probably obvious to you once you start looking at it.
And yeah, I realize I'm being silly. Doing a "time make allmodconfig" shows that it takes 1.5s to do. Should I care? No. But I feel that's an eternity for something that I think should just be instantaneous.
Linus
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