From owner-freebsd-current Sat Oct 12 16:36:43 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5699337B401; Sat, 12 Oct 2002 16:36:42 -0700 (PDT) Received: from mail47.fg.online.no (mail47-s.fg.online.no [148.122.161.47]) by mx1.FreeBSD.org (Postfix) with ESMTP id D137C43EB7; Sat, 12 Oct 2002 16:36:40 -0700 (PDT) (envelope-from frode@nordahl.net) Received: from samwise (ti200720a080-0707.bb.online.no [80.212.246.195]) by mail47.fg.online.no (8.9.3/8.9.3) with ESMTP id BAA28652; Sun, 13 Oct 2002 01:36:38 +0200 (MEST) Subject: Re: dmesg showing garbage From: Frode Nordahl To: Juli Mallett Cc: current@FreeBSD.ORG In-Reply-To: <20021012161159.A30348@FreeBSD.org> References: <1034464124.624.2.camel@samwise.xu.nordahl.net> <20021012161159.A30348@FreeBSD.org> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.8 Date: 13 Oct 2002 01:36:38 +0200 Message-Id: <1034465799.627.7.camel@samwise.xu.nordahl.net> Mime-Version: 1.0 Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sun, 2002-10-13 at 01:11, Juli Mallett wrote: > If you reboot and the memory is not cleared, the buffer (stored at a > fixed address) may still be intact, and the kernel buffering code will > be smart enough to span to the end of the buffer, and append (circularly) > there. This does not explain the garbled data in the "normal" dmesg output though. And it also happens after a power-down (shutdown -p). But, this is a laptop, with battery (and power cord plugged in). And it may keep memory alive for some obscure reason. Anyway, it could show that FreeBSD could do a better job initializing memory on bootup? > -- > Juli Mallett | FreeBSD: The Power To Serve > Will break world for fulltime employment. | finger jmallett@FreeBSD.org > http://people.FreeBSD.org/~jmallett/ | Support my FreeBSD hacking! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message