Re: [TECH TOPIC] Kernel documentation - update and future directions

[Mark Brown <broonie@kernel.org>]

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On Mon, Sep 01, 2025 at 08:46:35PM +0200, Mauro Carvalho Chehab wrote:

> It should be noticed that kernel-doc doesn't run in parallel. Python
> still suffers for a global big lock (called GIL). My attempts to run in
> parallel actually made kernel-doc slower, but this is changing: the
> next Python version is planning to get rid of GIL. So, maybe within
> a year we can re-add the patches to run it in parallel.

It'll take a lot longer for that to filter out to people's machines, for
example I'm running Debian stable on my desktop and I know a lot of
people have Ubuntu LTS.

> > That
> > compares unfavourably with allmodconfig on this system:
> > 
> >   $ time make -j56 allmodconfig
> >   ...
> >   make -j56 allmodconfig  5.31s user 1.93s system 146% cpu 4.931 total
> >   $ time make -j56
> >   ...
> >   make -j56  53468.11s user 4387.30s system 5084% cpu 18:57.77 total
> > 
> > and seems rather more likely to flag something for me.

> 32 seconds more, on the top of 53468.11s doesn't sound that much.

Yeah, if it was of that sort of order, ran clean with mainline and could
be checked automatically it'd be a lot more viable.

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