From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760396AbXIMROF (ORCPT ); Thu, 13 Sep 2007 13:14:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752692AbXIMRNz (ORCPT ); Thu, 13 Sep 2007 13:13:55 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:47266 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752654AbXIMRNy (ORCPT ); Thu, 13 Sep 2007 13:13:54 -0400 Date: Thu, 13 Sep 2007 12:13:49 -0500 From: Robin Holt To: Chuck Ebbert Cc: Robin Holt , Mikael Pettersson , Jeff Garzik , linux-kernel@vger.kernel.org Subject: Re: Possible hang inside interrupt handler on sata_promise. Message-ID: <20070913171349.GD26213@lnx-holt.americas.sgi.com> References: <20070912131904.GW14474@lnx-holt.americas.sgi.com> <46E95E5D.2050305@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46E95E5D.2050305@redhat.com> User-Agent: Mutt/1.4.2.2i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Is there any way on typical motherboards to send an NMI? On Altix boxes, we can use the system controller to send an NMI. I have found some motherboards appear to have an NMI line. Is there anything like that on i386? Maybe I am missing the issue entirely. Does deadlock inside an IRQ handler seem plausible? On a side note, I have reproduced the hang with a different storage device (ide). At the time, I have deactivated the volume group, stopped the raid device and unloaded the sata_promise module. I also noticed that uhci_hcd and eth1 (3com 3c59x module) are sharing IRQ 5 so I had unloaded the uhci_hcd and usbcore before the last test. On Thu, Sep 13, 2007 at 11:59:25AM -0400, Chuck Ebbert wrote: > There is a list of kernel options you can try, including: > > noapic > nolapic > pci=nomsi,nommconf > pci=noacpi I will try these this evening. Thanks, Robin