Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932371AbVKGAAT (ORCPT ); Sun, 6 Nov 2005 19:00:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932375AbVKGAAT (ORCPT ); Sun, 6 Nov 2005 19:00:19 -0500 Received: from smtp.osdl.org ([65.172.181.4]:6834 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S932371AbVKGAAS (ORCPT ); Sun, 6 Nov 2005 19:00:18 -0500 Date: Sun, 6 Nov 2005 16:00:08 -0800 From: Andrew Morton To: Hugh Dickins Cc: torvalds@osdl.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mm: poison struct page for ptlock Message-Id: <20051106160008.28822bbd.akpm@osdl.org> In-Reply-To: References: <20051106112838.0d524f65.akpm@osdl.org> <20051106151326.63cf16bd.akpm@osdl.org> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 600 Lines: 15 Hugh Dickins wrote: > > Suppress split ptlock on arches which may use one page for multiple page > tables. Reconsider what better to do (particularly on ppc64) later on. But why is that a problem per-se? A few "pagetable pages" will share the same lock. Deadlocky when we take two pagetable locks? The code ran OK on ppc64, fwiw. - 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/