Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932535AbWE3W5u (ORCPT ); Tue, 30 May 2006 18:57:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932536AbWE3W5u (ORCPT ); Tue, 30 May 2006 18:57:50 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:17836 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S932535AbWE3W5t (ORCPT ); Tue, 30 May 2006 18:57:49 -0400 Date: Wed, 31 May 2006 00:58:08 +0200 From: Ingo Molnar To: Andrew Morton Cc: Roland Dreier , linux-kernel@vger.kernel.org, Thomas Gleixner Subject: Re: 2.6.17-rc5-mm1 Message-ID: <20060530225808.GA5836@elte.hu> References: <20060530022925.8a67b613.akpm@osdl.org> <20060530154521.d737cc65.akpm@osdl.org> <20060530224955.GA5500@elte.hu> <20060530225254.GA5681@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060530225254.GA5681@elte.hu> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: -2.8 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.8 required=5.9 tests=ALL_TRUSTED,AWL autolearn=no SpamAssassin version=3.0.3 -2.8 ALL_TRUSTED Did not pass through any untrusted hosts 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1010 Lines: 27 * Ingo Molnar wrote: > > * Ingo Molnar wrote: > > > > do_IRQ() did a jump-to-zero. So there's no handler installed. > > > > yep. No desc->irq_handler. That should be 'impossible' on x86_64, > > because the irq_desc[] array is initialized with handle_bad_irq, and > > from that point on x86_64 only uses set_irq_chip_and_handler(), which > > at most can set it to another (non-NULL) handle_irq function. Weird. > > > > does MSI much with the irq_desc[] separately perhaps, clearing > > handle_irq in the process perhaps? > > aha - drivers/pci/msi.c sets msix_irq_type, which has no handle_irq > entry. This needs to be converted to irqchips. still ... that doesnt explain how the irq_desc[].irq_handler got NULL. Ingo - 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/