linux-kernel - Re: [PATCH v3 1/1] kbuild: deb-pkg: Build parallely with current dpkg-buildpackage

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Message-ID: <4be55ba4-d3fa-dfa9-7b38-13f3ced20ad2@linutronix.de>
Date:   Tue, 21 Mar 2023 11:28:54 +0100
From:   Bastian Germann <bage@...utronix.de>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] kbuild: deb-pkg: Build parallely with current
 dpkg-buildpackage

Am 21.03.23 um 11:18 schrieb Masahiro Yamada:
> "make bindeb-pkg" also runs in 16 threads because
> $(DEB_BUILD_OPTIONS) always contains "parallel=16"
> even if -j<N> option is given at all.
> 
> In other words, this patch will take away user's freedom
> to choose the number of threads.

Okay. To solve this, I would forward make's -j option to the dpkg-buildpackage calls,
which is now called with the defaults.

I think you should see the warning with older dpkg-buildpackage versions without the
patch applied as well because their default is dpkg-buildpackage -j`nproc` and is in
effect currently.