From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S272075AbTG2Un2 (ORCPT ); Tue, 29 Jul 2003 16:43:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S272115AbTG2Un1 (ORCPT ); Tue, 29 Jul 2003 16:43:27 -0400 Received: from zeke.inet.com ([199.171.211.198]:37804 "EHLO zeke.inet.com") by vger.kernel.org with ESMTP id S272075AbTG2UnZ (ORCPT ); Tue, 29 Jul 2003 16:43:25 -0400 Message-ID: <3F26DC68.3010000@inet.com> Date: Tue, 29 Jul 2003 15:43:20 -0500 From: Eli Carter User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.2) Gecko/20030708 X-Accept-Language: en-us, en MIME-Version: 1.0 To: John Bradford CC: linux-kernel@vger.kernel.org, pgw99@doc.ic.ac.uk Subject: Re: PATCH : LEDs - possibly the most pointless kernel subsystem ever References: <200307292038.h6TKcqlu000338@81-2-122-30.bradfords.org.uk> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org John Bradford wrote: >>>This patch adds an abstraction layer for programmable LED devices, >>>hardware drivers for the Status LEDs found on some Intel PIIX4E based >>>server hardware (notably the ISP1100 1U rackmount server) and LEDs wired >>>to the parallel port data lines. >> >>I haven't had chance to test this yet, but I really like the idea - by >>an amasing co-incidence, I was actually thinking about the possibility >>of doing a parallel port connected front panel earlier today! >> >>Does anybody have any suggestions for recommended standard uses for >>parallel port connected LEDs? >> >>Disk spinning up/disk ready >>Root login active >> >>Any other suggestions? > > > Ah, I just thought, for debugging purposes we could have LEDs for: > > * BKL taken > * Servicing interrupt > * Kernel stack usage > 2K Maybe also: * 100% CPU usage * Toggle each jiffie (help detect interrupts disabled) * User control for things like cpu/harddrive temp... * and of course, Morse code ;) Have fun, Eli --------------------. "If it ain't broke now, Eli Carter \ it will be soon." -- crypto-gram eli.carter(a)inet.com `-------------------------------------------------