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Subject: Re: [PATCH] kbuild: make single target builds even faster
To:     Masahiro Yamada <yamada.masahiro@socionext.com>,
        linux-kbuild@vger.kernel.org
Cc:     Michal Marek <michal.lkml@markovi.net>,
        linux-kernel@vger.kernel.org
References: <20191118045247.14082-1-yamada.masahiro@socionext.com>
From:   Jens Axboe <axboe@kernel.dk>
Message-ID: <2b1ab1b1-dd20-31f7-c787-921cbd66a828@kernel.dk>
Date:   Mon, 18 Nov 2019 07:26:24 -0700
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On 11/17/19 9:52 PM, Masahiro Yamada wrote:
> Commit 2dffd23f81a3 ("kbuild: make single target builds much faster")
> made the situation much better.
> 
> To improve it even more, apply the similar idea to the top Makefile.
> Trim unrelated directories from build-dirs.
> 
> The single build code must be moved above the 'descend' target.

I tested linux-next, which does improve things a bit, and this one on
top further improves it. We're now not THAT far off the situation
before these changes, that's a huge win. Thanks for working on this!

You can add:

Tested-by: Jens Axboe <axboe@kernel.dk>

to the commit, if you wish.

-- 
Jens Axboe