linux-kernel - Re: [PATCH] printk: Add loglevel for "do not print to consoles".

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Date:   Wed, 06 May 2020 08:26:10 -0700
From:   Joe Perches <joe@...ches.com>
To:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Petr Mladek <pmladek@...e.com>
Cc:     Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
        Dmitry Safonov <dima@...sta.com>,
        Michal Hocko <mhocko@...e.com>,
        Yafang Shao <laoar.shao@...il.com>
Subject: Re: [PATCH] printk: Add loglevel for "do not print to consoles".

On Wed, 2020-05-06 at 18:45 +0900, Tetsuo Handa wrote:
> On 2020/04/28 20:33, Tetsuo Handa wrote:
> > On 2020/04/27 15:21, Sergey Senozhatsky wrote:
> > > > KERN_NO_CONSOLES is for type of messages where "saved for later analysis" is
> > > > important but "printed for immediate notification" is not important.
> > > > In other words, KERN_NO_CONSOLES is NOT for dying messages where "printed for
> > > > immediate notification" is important.
> > > 
> > > per-console loglevel is a user configurable parameter.
> > > KERN_NO_CONSOLES is a hard-coded policy.
> > 
> > But given that whether to use KERN_NO_CONSOLES is configurable via e.g. sysctl,
> > KERN_NO_CONSOLES will become a user configurable parameter. What's still wrong?
> > 
> 
> Any problems remaining?

printk_get_level / printk_skip_level and the various
uses of %pV using printk_get_level