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Date: Fri, 4 Apr 2014 15:48:53 -0700
Message-ID: <CA+55aFzM9Q9Lnxa+SjqfB6XzHJv-sHHqQBYzR6pCcMA6Jbxz5A@mail.gmail.com>
Subject: Re: [RFC PATCH] cmdline: Hide "debug" from /proc/cmdline
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>, Steven Rostedt <rostedt@goodmis.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@amacapital.net>, Joerg Roedel <joro@8bytes.org>,
        Jiri Kosina <jkosina@suse.cz>, Mateusz Guzik <mguzik@redhat.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        LKML <linux-kernel@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>,
        Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@kernel.org>,
        Mel Gorman <mgorman@suse.de>, Kay Sievers <kay@vrfy.org>
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Sender: linux-kernel-owner@vger.kernel.org

On Fri, Apr 4, 2014 at 3:45 PM, Alexei Starovoitov
<alexei.starovoitov@gmail.com> wrote:
>
> can there be two bulletproof buffers: one for in kernel printk
> and another ratelimited one for writes into /dev/kmsg.
> On the read from /dev/kmsg they're combined by time.

Or, you know, people could just stop spamming /dev/kmsg.

Let's not overdesign this. No sane use will be impacted by rate
limiting, and insane uses aren't something we should design for. Even
the systemd spam was a *bug*, for chrissake.

             Linus
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