Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 19 Oct 2002 15:34:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 19 Oct 2002 15:34:30 -0400 Received: from tmr-02.dsl.thebiz.net ([216.238.38.204]:36359 "EHLO gatekeeper.tmr.com") by vger.kernel.org with ESMTP id ; Sat, 19 Oct 2002 15:34:30 -0400 Date: Sat, 19 Oct 2002 15:40:22 -0400 (EDT) From: Bill Davidsen To: Linux-Kernel Mailing List Subject: Any hope of fixing shutdown power off for SMP? Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1270 Lines: 28 I've beaten this dead horse before, but it still irks me that Linux can't power down an SMP system. People claim that it can't be done safely, but maybe somone can reverse engineer NT if we aren't up to the job. Every once in a while a power fail will leave the systems on UPS, and at some point it's needed to shut them down before the UPS is dead. You don't want that, since if the power comes up and then drops during boot it may hose filesystems. So I want the system really down while the UPS has a fair bit of power left. The only suggestion I got was to install NT, put a powerdown in the startup directory, use lilo -R to reboot in NT, then do a reboot. Wonderful. What I'm actually doing is rebooting a UP kernel and checking in rc.local for only one processor, in which case I power down. That works, but it's ugly! Is it really that hard to shutdown all CPUs but one, then power down? -- bill davidsen CTO, TMR Associates, Inc Doing interesting things with little computers since 1979. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/