From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758467AbXHHJdj (ORCPT ); Wed, 8 Aug 2007 05:33:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932349AbXHHJdY (ORCPT ); Wed, 8 Aug 2007 05:33:24 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:59657 "EHLO e1.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932363AbXHHJdX (ORCPT ); Wed, 8 Aug 2007 05:33:23 -0400 Date: Wed, 8 Aug 2007 15:03:36 +0530 From: Vivek Goyal To: Martin Wilck Cc: "Eric W. Biederman" , Haren Myneni , "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" Subject: Re: PATCH/RFC: [kdump] fix APIC shutdown sequence Message-ID: <20070808093336.GB13808@in.ibm.com> Reply-To: vgoyal@in.ibm.com References: <46B73955.2080007@fujitsu-siemens.com> <20070807142928.GA18839@in.ibm.com> <46B8AECA.7050908@fujitsu-siemens.com> <46B986D5.2010407@fujitsu-siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46B986D5.2010407@fujitsu-siemens.com> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 08, 2007 at 11:03:17AM +0200, Martin Wilck wrote: > Hello Eric, > > > How bad is it if you just run with irqpoll in the kdump kernel? > > If running with irqpoll is usable that is probably preferable > > to putting in a hardware work around we can survive without. > > Yes, I tried that. No effect. > Martin, at least irpoll should have worked. I am assuming your timer interrupts are coming in second kernel. In that case we are not dependent at all on actually receiving device interrupt. Polling should take care of it. What is that device which is not working? What is the success criterion? I mean, did you check that the irq handler of your driver is now invoked with irqpoll and now it can drive the device without worrying about LAPIC and IOAPIC settings? Thanks Vivek