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Date: Tue, 13 Mar 2018 07:16:03 +0100
From: Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCH v3 2/2] kbuild: Don't mess with the .cache.mk when root
Message-ID: <20180313061603.jsgiumet23uqi6hl@gmail.com>
References: <20180313061109.72629-1-dianders@chromium.org>
 <20180313061109.72629-3-dianders@chromium.org>
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In-Reply-To: <20180313061109.72629-3-dianders@chromium.org>
Sender: linux-kbuild-owner@vger.kernel.org
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To: Douglas Anderson <dianders@chromium.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>, malat@debian.org, dave.hansen@intel.com, yang.s@alibaba-inc.com, linux@roeck-us.net, Matthias Kaehlcke <mka@chromium.org>, Cao jin <caoj.fnst@cn.fujitsu.com>, Arnd Bergmann <arnd@arndb.de>, Mark Charlebois <charlebm@gmail.com>, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, Michal Marek <michal.lkml@markovi.net>, Nick Desaulniers <ndesaulniers@google.com>, Linus Torvalds <torvalds@linux-foundation.org>, Peter Zijlstra <a.p.zijlstra@chello.nl>, Thomas Gleixner <tglx@linutronix.de>


* Douglas Anderson <dianders@chromium.org> wrote:

> +# Don't create Makefile caches if running as root since they can't be deleted
> +# easily; in the real world we might be root when doing "sudo make install"
> +ifeq ($(shell id -u),0)
> +export KBUILD_NOCACHE := 1
> +endif

Please don't do this - many prominent kernel developers build their kernels as 
root - this makes the build slower for them, and also bifurcates testing.

Thanks,

	Ingo