Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161151AbaDBXX1 (ORCPT ); Wed, 2 Apr 2014 19:23:27 -0400 Received: from cantor2.suse.de ([195.135.220.15]:52457 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161055AbaDBXXX (ORCPT ); Wed, 2 Apr 2014 19:23:23 -0400 Date: Thu, 3 Apr 2014 01:23:15 +0200 (CEST) From: Jiri Kosina X-X-Sender: jikos@twin.jikos.cz To: Linus Torvalds cc: Mateusz Guzik , Greg Kroah-Hartman , Steven Rostedt , LKML , Andrew Morton , Thomas Gleixner , "H. Peter Anvin" , Borislav Petkov , Ingo Molnar , Mel Gorman , Kay Sievers Subject: Re: [RFC PATCH] cmdline: Hide "debug" from /proc/cmdline In-Reply-To: Message-ID: References: <20140402144219.4cafbe37@gandalf.local.home> <20140402221212.GD16570@mguzik.redhat.com> User-Agent: Alpine 2.00 (LRH 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2 Apr 2014, Linus Torvalds wrote: > Steven, Borislav, one thing that strikes me might be a good idea is to > limit the amount of non-kernel noise in dmesg. We already have the > concept of rate-limiting various spammy internal kernel messages for > when device drivers misbehave etc. Maybe we can just add rate-limiting > to the interfaces that add messages to the kernel buffers, and work > around this problem that way instead while waiting for Gregs fix to > percolate? Or are the systemd debug messages going to so many other > places too that that wouldn't really help? I think that it's in principle a good idea, however ... the in-kernel ratelimiting always happens per sourcecode location, but this will be rather hard to achieve with interface such as /dev/kmsg. If /dev/kmsg is going to be ratelimited as a whole, it might potentially create a severely unfair situation between individual userspace programs trying to do logging (although there is apparently only one userspace service doing any logging through this interface whatsoever, right?). -- Jiri Kosina SUSE Labs -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/