From owner-freebsd-hackers Sun Sep 15 6:36:33 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id EB34B37B400 for ; Sun, 15 Sep 2002 06:36:31 -0700 (PDT) Received: from sirppi.helsinki.fi (sirppi.helsinki.fi [128.214.205.27]) by mx1.FreeBSD.org (Postfix) with ESMTP id BE29043E4A for ; Sun, 15 Sep 2002 06:36:30 -0700 (PDT) (envelope-from akoskine@cc.helsinki.fi) Received: from localhost (akoskine@localhost) by sirppi.helsinki.fi (8.11.6/8.11.4) with ESMTP id g8FDaPD07661; Sun, 15 Sep 2002 16:36:25 +0300 (EET DST) X-Authentication-Warning: sirppi.helsinki.fi: akoskine owned process doing -bs Date: Sun, 15 Sep 2002 16:36:25 +0300 (EET DST) From: Aaro J Koskinen To: =?iso-8859-15?Q?Aur=E9lien?= Nephtali Cc: Sean Hamilton , Subject: Re: dmesg circular buffer In-Reply-To: <20020915093852.GA3645@nebula.wanadoo.fr> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sun, 15 Sep 2002, [iso-8859-15] Aurélien Nephtali wrote: > It seems that on some machines, while rebooting, the memory > where the kernel message buffer is stored, is not cleaned (on my laptop > it's the case). > > If your computer has this *bug*, doing 'dmesg' will display all > messages since you powered on you computer. [...] > PS: when i say 'memory problem', I don't really know if it's deliberate or not > but I think it's not :p It's not a bug. FreeBSD implements reboot by just reseting the CPU, not the whole system. BIOS should not clear or test the memory in this case. Sometimes it's desirable to leave memory as is. Unfortunately, not all BIOS manufacturers agree with this. A. -- Aaro Koskinen E-mail: aaro@iki.fi "I'm the ocean, I'm the giant undertow." http://www.iki.fi/aaro To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message