From owner-freebsd-stable@FreeBSD.ORG  Thu Feb 16 09:27:07 2012
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 18476106564A
	for <freebsd-stable@freebsd.org>; Thu, 16 Feb 2012 09:27:07 +0000 (UTC)
	(envelope-from pluknet@gmail.com)
Received: from mail-lpp01m010-f54.google.com (mail-lpp01m010-f54.google.com
	[209.85.215.54])
	by mx1.freebsd.org (Postfix) with ESMTP id 8E1E98FC0A
	for <freebsd-stable@freebsd.org>; Thu, 16 Feb 2012 09:27:05 +0000 (UTC)
Received: by lagz14 with SMTP id z14so3155578lag.13
	for <multiple recipients>; Thu, 16 Feb 2012 01:27:05 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=mime-version:in-reply-to:references:date:message-id:subject:from:to
	:cc:content-type;
	bh=zM1hhhHOo1kNMcgmxswbvFNut92rat2mWnjdBTkClWk=;
	b=WgLlEIfLCRd7r7JYn4bEqvY8voUf3Q94Y/gOgDax94hZmGSzYouF/pE3jXezoSC57G
	h5o9tq037clOsLRk4fhE3N/U3zLJr/eKsM8958ueCGhWejLlL4FBiyU5veVnsKJCe0Hv
	e5azzbVN49H0LGUokv9C4Upk+FT1Fi00QC6/0=
MIME-Version: 1.0
Received: by 10.152.110.102 with SMTP id hz6mr1316235lab.21.1329384425082;
	Thu, 16 Feb 2012 01:27:05 -0800 (PST)
Received: by 10.152.18.4 with HTTP; Thu, 16 Feb 2012 01:27:05 -0800 (PST)
In-Reply-To: <4F3CC54B.7080402@freebsd.org>
References: <4F3CC54B.7080402@freebsd.org>
Date: Thu, 16 Feb 2012 12:27:05 +0300
Message-ID: <CAE-mSO+CQqzEFUbuyfb5=oC0iwr0TNEDjbmKTXUYN7Fk+er8qA@mail.gmail.com>
From: Sergey Kandaurov <pluknet@gmail.com>
To: Julian Elischer <julian@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1
Cc: FreeBSD Stable <freebsd-stable@freebsd.org>
Subject: Re: something wrong with dmesg?
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 16 Feb 2012 09:27:07 -0000

On 16 February 2012 12:58, Julian Elischer <julian@freebsd.org> wrote:
> I just noticed that lately in 9.x and maybe 8-Stable, dmesg seems to return
> nothing if
> there is active logging going on. I saw someone else refer to this as well.
>
> Has this been reported?

Didn't we have this for years? I cannot recall there was a difference to the
current behavior since 8.x or 7.x (or even 6.x).
kern.msgbuf includes messages sent with syslog, and if they dominate
then you might get empty dmesg output. By default it skips non-kernel
(or rather those messages which doesn't use BSD syslog format)
messages, and you can include them using dmesg -a.

-- 
wbr,
pluknet