From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932599AbWAJU3e (ORCPT ); Tue, 10 Jan 2006 15:29:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932596AbWAJU3e (ORCPT ); Tue, 10 Jan 2006 15:29:34 -0500 Received: from filer.fsl.cs.sunysb.edu ([130.245.126.2]:46256 "EHLO filer.fsl.cs.sunysb.edu") by vger.kernel.org with ESMTP id S932599AbWAJU3c (ORCPT ); Tue, 10 Jan 2006 15:29:32 -0500 Date: Tue, 10 Jan 2006 15:29:20 -0500 From: Josef Sipek To: Jan Engelhardt Cc: Andi Kleen , Dave Jones , linux-kernel@vger.kernel.org Subject: Re: Console debugging wishlist was: Re: oops pauser. Message-ID: <20060110202920.GA5479@filer.fsl.cs.sunysb.edu> References: <20060105045212.GA15789@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 10, 2006 at 09:25:46PM +0100, Jan Engelhardt wrote: > >What would be also cool would be to fix the VGA console to have > >a larger scroll back buffer. The standard kernel boot output > >is far larger than the default scrollback, so if you get a hang > >late you have no way to look back to all the earlier > >messages. > > > >(it is hard to understand that with 128MB+ graphic cards and 512+MB > >computers the scroll back must be still so short...) > > I doubt this scrollback buffer is implemented as part of the video cards. > It is rather a kernel invention, and therefore uses standard RAM. But the > idea is good, preferably make it a CONFIG_ option. There is a config option that lets you specify the size of this buffer: CONFIG_LOG_BUF_SHIFT Jeff.