Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762446AbXHXQrG (ORCPT ); Fri, 24 Aug 2007 12:47:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757620AbXHXQqv (ORCPT ); Fri, 24 Aug 2007 12:46:51 -0400 Received: from E23SMTP04.au.ibm.com ([202.81.18.173]:43870 "EHLO e23smtp04.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761698AbXHXQqt (ORCPT ); Fri, 24 Aug 2007 12:46:49 -0400 Message-ID: <46CF0B70.1050302@linux.vnet.ibm.com> Date: Fri, 24 Aug 2007 22:16:40 +0530 From: Kamalesh Babulal User-Agent: Thunderbird 1.5.0.12 (X11/20070604) MIME-Version: 1.0 To: Yasunori Goto CC: Andrew Morton , Mel Gorman , "Luck, Tony" , Jeremy Higdon , Andi Kleen , linux-kernel@vger.kernel.org, Balbir Singh , linux-ia64@vger.kernel.org, Christoph Lameter , linux-mm@kvack.org Subject: Re: [PATCH] Fix find_next_best_node (Re: [BUG] 2.6.23-rc3-mm1 Kernel panic - not syncing: DMA: Memory would be corrupted) References: <617E1C2C70743745A92448908E030B2A023EB020@scsmsx411.amr.corp.intel.com> <20070823142133.9359a1ce.akpm@linux-foundation.org> <20070824153945.3C75.Y-GOTO@jp.fujitsu.com> In-Reply-To: <20070824153945.3C75.Y-GOTO@jp.fujitsu.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1332 Lines: 43 Yasunori Goto wrote: > I found find_next_best_node() was wrong. > I confirmed boot up by the following patch. > Mel-san, Kamalesh-san, could you try this? > > Bye. > --- > > Fix decision of memoryless node in find_next_best_node(). > This can be cause of SW-IOMMU's allocation failure. > > This patch is for 2.6.23-rc3-mm1. > > Signed-off-by: Yasunori Goto > > --- > mm/page_alloc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > Index: current/mm/page_alloc.c > =================================================================== > --- current.orig/mm/page_alloc.c 2007-08-24 16:03:17.000000000 +0900 > +++ current/mm/page_alloc.c 2007-08-24 16:04:06.000000000 +0900 > @@ -2136,7 +2136,7 @@ static int find_next_best_node(int node, > * Note: N_HIGH_MEMORY state not guaranteed to be > * populated yet. > */ > - if (pgdat->node_present_pages) > + if (!pgdat->node_present_pages) > continue; > > /* Don't want a node to appear more than once */ > > This patch resolves the kernel panic problem. - Kamalesh Babulal. - 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/