From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S272136AbTG2VV1 (ORCPT ); Tue, 29 Jul 2003 17:21:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S272069AbTG2VSt (ORCPT ); Tue, 29 Jul 2003 17:18:49 -0400 Received: from mail.hostrack.net ([67.120.136.74]:17931 "EHLO mail.hostrack.net") by vger.kernel.org with ESMTP id S272136AbTG2VQ1 (ORCPT ); Tue, 29 Jul 2003 17:16:27 -0400 Message-ID: <01e101c35616$859ddad0$0202a8c0@BOB> From: "Ryan Flowers" To: References: <200307292038.h6TKcqlu000338@81-2-122-30.bradfords.org.uk> <20030729134046.A8007@grieg.holmsjoen.com> Subject: Re: PATCH : LEDs - possibly the most pointless kernel subsystem ever Date: Tue, 29 Jul 2003 14:15:22 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > On Tue, Jul 29, 2003 at 09:38:52PM +0100, John Bradford wrote: > > Ah, I just thought, for debugging purposes we could have LEDs for: > > > > * BKL taken > > * Servicing interrupt > > * Kernel stack usage > 2K > > In the way olden days we used the console lights for a realtime > display of buffer use on a PDP-11. This type of realtime display > can be most useful, especially if it's easily configurable. > > -- > Randolph Bentson > bentson@holmsjoen.com > - These ideas based on my experience in a production server environment, in web hosting: Temperature (Red/Yellow/Green LED) CPU load (Red/Yellow/Green LED) Out of Memory (blinking red?) Don't imagine it would be hard to make a red LED status also set off an alarm via the PC speaker. Although really a proper system will alert you of these things anyway, but it would be nice to see it at a glance too. Ryan Flowers - Reno NV http://www.ryanflowers.com