From: Lucas De Marchi <lucas.de.marchi@gmail.com>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>,
linux-modules <linux-modules@vger.kernel.org>,
live-patching@vger.kernel.org, fstests@vger.kernel.org,
linux-block@vger.kernel.org, hare@suse.de, dgilbert@interlog.com,
Jessica Yu <jeyu@kernel.org>,
osandov@fb.com, lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 1/3] libkmod: add a library notice log level print
Date: Mon, 20 Sep 2021 22:53:53 -0700 [thread overview]
Message-ID: <CAKi4VAKa7LKXdRmA7epgbkUZw2wpUz19JYYdZ35mPCxSL_W_kw@mail.gmail.com> (raw)
In-Reply-To: <20210810051602.3067384-2-mcgrof@kernel.org>
On Mon, Aug 9, 2021 at 11:56 PM Luis Chamberlain <mcgrof@kernel.org> wrote:
>
> When you use pass the -v argument to modprobe we bump
> the log level from the default modprobe log level of
> LOG_WARNING (4) to LOG_NOTICE (5), however the library
> only has avaiable to print:
>
> #define DBG(ctx, arg...) kmod_log_cond(ctx, LOG_DEBUG, ## arg)
> #define INFO(ctx, arg...) kmod_log_cond(ctx, LOG_INFO, ## arg)
> #define ERR(ctx, arg...) kmod_log_cond(ctx, LOG_ERR, ## arg)
>
> LOG_INFO (6) however is too high of a level for it to be
> effective at printing anything when modprobe -v is passed.
> And so the only way in which modprobe -v can trigger the
> library to print a verbose message is to use ERR() but that
> always prints something and we don't want that in some
> situations.
>
> We need to add a new log level macro which uses LOG_NOTICE (5)
> for a "normal but significant condition" which users and developers
> can use to look underneath the hood to confirm if a situation is
> happening.
>
> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
> ---
> libkmod/libkmod-internal.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/libkmod/libkmod-internal.h b/libkmod/libkmod-internal.h
> index 398af9c..2e5e1bc 100644
> --- a/libkmod/libkmod-internal.h
> +++ b/libkmod/libkmod-internal.h
> @@ -25,10 +25,12 @@ static _always_inline_ _printf_format_(2, 3) void
> # else
> # define DBG(ctx, arg...) kmod_log_null(ctx, ## arg)
> # endif
> +# define NOTICE(ctx, arg...) kmod_log_cond(ctx, LOG_NOTICE, ## arg)
> # define INFO(ctx, arg...) kmod_log_cond(ctx, LOG_INFO, ## arg)
> # define ERR(ctx, arg...) kmod_log_cond(ctx, LOG_ERR, ## arg)
> #else
> # define DBG(ctx, arg...) kmod_log_null(ctx, ## arg)
> +# define NOTICE(ctx, arg...) kmod_log_cond(ctx, LOG_NOTICE, ## arg)
did you mean kmod_log_null()?
Lucas De Marchi
> # define INFO(ctx, arg...) kmod_log_null(ctx, ## arg)
> # define ERR(ctx, arg...) kmod_log_null(ctx, ## arg)
> #endif
> --
> 2.30.2
>
next prev parent reply other threads:[~2021-09-21 5:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-10 5:15 [PATCH v2 0/3] kmod: add patient module removal support Luis Chamberlain
2021-08-10 5:16 ` [PATCH v2 1/3] libkmod: add a library notice log level print Luis Chamberlain
2021-09-21 5:53 ` Lucas De Marchi [this message]
2021-09-21 18:40 ` Luis Chamberlain
2021-09-23 8:02 ` Lucas De Marchi
2021-08-10 5:16 ` [PATCH v2 2/3] libkmod/libkmod-module: add refcnt fd helper Luis Chamberlain
2021-08-10 5:16 ` [PATCH v2 3/3] libkmod-module: add support for a patient module removal option Luis Chamberlain
2021-09-23 8:51 ` Lucas De Marchi
2021-09-28 1:38 ` Luis Chamberlain
2021-09-29 18:48 ` Lucas De Marchi
2021-11-15 20:21 ` Luis Chamberlain
2021-12-08 12:53 ` Luis Chamberlain
2021-09-15 17:40 ` [PATCH v2 0/3] kmod: add patient module removal support Luis Chamberlain
2021-09-21 5:51 ` Lucas De Marchi
2022-02-17 8:13 ` Luis Chamberlain
2022-02-18 8:20 ` Lucas De Marchi
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