linux-kernel - Re: [PATCH v3] docs: Use make invocation's -j argument for parallelism

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Message-ID: <20191001063949.1b5e87dc@lwn.net>
Date:   Tue, 1 Oct 2019 06:39:49 -0600
From:   Jonathan Corbet <corbet@....net>
To:     Kees Cook <keescook@...omium.org>
Cc:     Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] docs: Use make invocation's -j argument for
 parallelism

On Tue, 24 Sep 2019 16:29:58 -0700
Kees Cook <keescook@...omium.org> wrote:

> While sphinx 1.7 and later supports "-jauto" for parallelism, this
> effectively ignores the "-j" flag used in the "make" invocation, which
> may cause confusion for build systems. Instead, extract the available
> parallelism from "make"'s job server (since it is not exposed in any
> special variables) and use that for the "sphinx-build" run. Now things
> work correctly for builds where -j is specified at the top-level:
> 
> 	make -j16 htmldocs
> 
> If -j is not specified, continue to fallback to "-jauto" if available.
> 
> Signed-off-by: Kees Cook <keescook@...omium.org>

I finally messed with this a bit; it seems to do exactly what's written on
the box.

It seems to me that The Real Solution™ here is to send a patch to the
Sphinx folks adding a "-jgmake" (or some such) option.  It also seems to
me that none of us is likely to get around to that in the near future.  So
I just applied this, thanks for dealing with all my picky comments...

jon