Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264295AbUFCVGu (ORCPT ); Thu, 3 Jun 2004 17:06:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264299AbUFCVGu (ORCPT ); Thu, 3 Jun 2004 17:06:50 -0400 Received: from thunk.org ([140.239.227.29]:44781 "EHLO thunker.thunk.org") by vger.kernel.org with ESMTP id S264295AbUFCVGt (ORCPT ); Thu, 3 Jun 2004 17:06:49 -0400 Date: Thu, 3 Jun 2004 17:06:01 -0400 From: "Theodore Ts'o" To: Oliver Neukum Cc: Dmitry Torokhov , Andrew Morton , linux-kernel@vger.kernel.org, greg@kroah.com, vojtech@suse.cz Subject: Re: [RFC] Changing SysRq - show registers handling Message-ID: <20040603210601.GC6709@thunk.org> Mail-Followup-To: Theodore Ts'o , Oliver Neukum , Dmitry Torokhov , Andrew Morton , linux-kernel@vger.kernel.org, greg@kroah.com, vojtech@suse.cz References: <200406030134.04121.dtor_core@ameritech.net> <20040603001804.750b7fa5.akpm@osdl.org> <200406030227.22178.dtor_core@ameritech.net> <200406030944.01615.oliver@neukum.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200406030944.01615.oliver@neukum.org> User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 981 Lines: 21 On Thu, Jun 03, 2004 at 09:44:01AM +0200, Oliver Neukum wrote: > Am Donnerstag, 3. Juni 2004 09:27 schrieb Dmitry Torokhov: > > I don't like the requirement of SysRq request processing being in hard > > interrupt handler - that excludes uinput-generated events and precludes > > moving keyboard handling to a tasklet for example. > > SysRq should work even if bottom halfs don't. Indeed; one of the times when SysRq-p is used in the field is when the machine is completely wedged. Sometimes it's the only way to figure out where the machine is wedged. It would be unfortunate if the number of cases (when the kernel is four feet in the air and twitching) where SysRq worked decreases as a result of the proposed change. - Ted - 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/