linux-kernel - Re: [PATCH] printk: Ratelimit messages printed by console drivers

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Message-ID: <20180413101233.0792ebf0@gandalf.local.home>
Date:   Fri, 13 Apr 2018 10:12:33 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        akpm@...ux-foundation.org, linux-mm@...ck.org,
        Peter Zijlstra <peterz@...radead.org>, Jan Kara <jack@...e.cz>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] printk: Ratelimit messages printed by console drivers

On Fri, 13 Apr 2018 14:47:04 +0200
Petr Mladek <pmladek@...e.com> wrote:


> The interval is set to one hour. It is rather arbitrary selected time.
> It is supposed to be a compromise between never print these messages,
> do not lockup the machine, do not fill the entire buffer too quickly,
> and get information if something changes over time.


I think an hour is incredibly long. We only allow 100 lines per hour for
printks happening inside another printk?

I think 5 minutes (at most) would probably be plenty. One minute may be
good enough.

-- Steve