From: Randy Dunlap <rdunlap@infradead.org>
To: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
Masahiro Yamada <masahiroy@kernel.org>,
linux-kbuild@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Dmitry Vyukov <dvyukov@google.com>
Subject: Re: [PATCH] kconfig: Add yes2modconfig and mod2yesconfig targets.
Date: Fri, 6 Dec 2019 08:09:03 -0800 [thread overview]
Message-ID: <5a473c6c-cc1f-6648-31ec-3b40e415a836@infradead.org> (raw)
In-Reply-To: <1575625847-6384-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp>
On 12/6/19 1:50 AM, Tetsuo Handa 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" target 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>
> ---
> scripts/kconfig/Makefile | 2 +-
> scripts/kconfig/conf.c | 17 +++++++++++++++++
> scripts/kconfig/confdata.c | 26 ++++++++++++++++++++++++++
> scripts/kconfig/lkc.h | 3 +++
> 4 files changed, 47 insertions(+), 1 deletion(-)
>
> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index 2f1a59fa5169..3516809255be 100644
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -67,7 +67,7 @@ localyesconfig localmodconfig: $(obj)/conf
> # deprecated for external use
> simple-targets := oldconfig allnoconfig allyesconfig allmodconfig \
> alldefconfig randconfig listnewconfig olddefconfig syncconfig \
> - helpnewconfig
> + helpnewconfig yes2modconfig mod2yesconfig
>
> PHONY += $(simple-targets)
In this Makefile (above), please also update the available 'help' targets.
--
~Randy
next prev parent reply other threads:[~2019-12-06 16:09 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 [this message]
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
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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