Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030795AbXAZGgV (ORCPT ); Fri, 26 Jan 2007 01:36:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030796AbXAZGgV (ORCPT ); Fri, 26 Jan 2007 01:36:21 -0500 Received: from omx1-ext.sgi.com ([192.48.179.11]:40527 "EHLO omx1.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1030795AbXAZGgU (ORCPT ); Fri, 26 Jan 2007 01:36:20 -0500 Date: Thu, 25 Jan 2007 22:36:17 -0800 (PST) From: Christoph Lameter To: Nick Piggin cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] Track mlock()ed pages In-Reply-To: <45B9A00C.4040701@yahoo.com.au> Message-ID: References: <45B9A00C.4040701@yahoo.com.au> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 806 Lines: 25 On Fri, 26 Jan 2007, Nick Piggin wrote: > Christoph Lameter wrote: > > Add NR_MLOCK > > > > Track mlocked pages via a ZVC > > I think it is not quite right. You are tracking the number of ptes > that point to mlocked pages, which can be >= the actual number of pages. Mlocked pages are not inherited. I would expect sharing to be very rare. > Also, page_add_anon_rmap still needs to be balanced with page_remove_rmap. Hmmm.... > I can't think of an easy way to do this without per-page state. ie. > another page flag. Thats what I am trying to avoid. - 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/