Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757020AbZFHQP6 (ORCPT ); Mon, 8 Jun 2009 12:15:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755772AbZFHQPt (ORCPT ); Mon, 8 Jun 2009 12:15:49 -0400 Received: from mail.vyatta.com ([76.74.103.46]:39802 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756820AbZFHQPr (ORCPT ); Mon, 8 Jun 2009 12:15:47 -0400 Date: Mon, 8 Jun 2009 09:15:44 -0700 From: Stephen Hemminger To: "Rafael J. Wysocki" , "Dan Williams" Cc: Linux Kernel Mailing List , Kernel Testers List Subject: Re: [Bug #13116] Can't boot with nosmp Message-ID: <20090608091544.53a94235@nehalam> In-Reply-To: References: Organization: Vyatta X-Mailer: Claws Mail 3.6.1 (GTK+ 2.16.1; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1266 Lines: 38 On Sun, 7 Jun 2009 11:52:49 +0200 (CEST) "Rafael J. Wysocki" wrote: > This message has been generated automatically as a part of a report > of recent regressions. > > The following bug entry is on the current list of known regressions > from 2.6.29. Please verify if it still should be listed and let me know > (either way). > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=13116 > Subject : Can't boot with nosmp > Submitter : Stephen Hemminger > Date : 2009-04-15 4:18 (54 days old) > References : http://marc.info/?l=linux-kernel&m=123976917817920&w=4 > Handled-By : Dan Williams > > I suspect this bit of code in dmaengine is the culprit: /* redistribute available channels */ n = 0; for_each_dma_cap_mask(cap, dma_cap_mask_all) for_each_online_cpu(cpu) { if (num_possible_cpus() > 1) chan = nth_chan(cap, n++); else chan = nth_chan(cap, -1); Why does num_possible_cpus() == 1 have to be a special case? -- -- 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/