From: Masahiro Yamada <masahiroy@kernel.org>
To: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
Randy Dunlap <rdunlap@infradead.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH v3] kconfig: Add yes2modconfig and mod2yesconfig targets.
Date: Wed, 18 Dec 2019 23:11:00 +0900 [thread overview]
Message-ID: <CAK7LNATNY1oP5XgFH3+fuUU=Z7pEz7Sqz0vKCzvhM4Kem7RkOg@mail.gmail.com> (raw)
In-Reply-To: <ced8ab1c-9c35-c7b0-6b9e-bcee7ffdf469@i-love.sakura.ne.jp>
On Tue, Dec 17, 2019 at 6:42 PM Tetsuo Handa
<penguin-kernel@i-love.sakura.ne.jp> wrote:
>
> Since kernel configs provided by syzbot are close to "make allyesconfig",
> it takes long time to rebuild. This is especially waste of time when we
> need to rebuild for many times (e.g. doing manual printk() inspection,
> bisect operations).
>
> We can save time if we can exclude modules which are irrelevant to each
> problem. But "make localmodconfig" cannot exclude modules which are built
> into vmlinux because /sbin/lsmod output is used as the source of modules.
>
> Therefore, this patch adds "make yes2modconfig" which converts from =y
> to =m if possible. After confirming that the interested problem is still
> reproducible, we can try "make localmodconfig" (and/or manually tune
> based on "Modules linked in:" line) in order to exclude modules which are
> irrelevant to the interested problem. While we are at it, this patch also
> adds "make mod2yesconfig" which converts from =m to =y in case someone
> wants to convert from =m to =y after "make localmodconfig".
>
> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
> Cc: Dmitry Vyukov <dvyukov@google.com>
> ---
> Changelog since v2:
> - Add 'if possible' to help message.
> - Make conf_rewrite_mod_or_yes() void.
> - Don't call check_conf() loop, for conf_write() takes care.
> - Use sym_add_change_count(1) to tell something has changed.
>
> Changelog since v1:
> - Updated the available 'help' targets in Makefile.
Applied to linux-kbuild. Thanks.
--
Best Regards
Masahiro Yamada
next prev parent reply other threads:[~2019-12-18 14:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-06 9:50 [PATCH] kconfig: Add yes2modconfig and mod2yesconfig targets Tetsuo Handa
2019-12-06 16:09 ` Randy Dunlap
2019-12-07 1:42 ` [PATCH v2] " Tetsuo Handa
2019-12-16 11:10 ` Masahiro Yamada
2019-12-16 12:58 ` Tetsuo Handa
2019-12-17 1:03 ` Masahiro Yamada
2019-12-17 9:42 ` [PATCH v3] " Tetsuo Handa
2019-12-18 14:11 ` Masahiro Yamada [this message]
2020-02-04 4:08 ` [PATCH] kconfig: Invalidate all symbols after changing to y or m Tetsuo Handa
2020-02-05 4:42 ` Masahiro Yamada
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