From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262274AbUCHAlA (ORCPT ); Sun, 7 Mar 2004 19:41:00 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262357AbUCHAlA (ORCPT ); Sun, 7 Mar 2004 19:41:00 -0500 Received: from fw.osdl.org ([65.172.181.6]:54186 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262274AbUCHAk7 (ORCPT ); Sun, 7 Mar 2004 19:40:59 -0500 Date: Sun, 7 Mar 2004 16:40:52 -0800 From: Andrew Morton To: Pavel Machek Cc: linux-kernel@vger.kernel.org Subject: Re: Some highmem pages still in use after shrink_all_memory()? Message-Id: <20040307164052.0c8a212b.akpm@osdl.org> In-Reply-To: <20040307144921.GA189@elf.ucw.cz> References: <20040307144921.GA189@elf.ucw.cz> X-Mailer: Sylpheed version 0.9.4 (GTK+ 1.2.10; i686-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 X-Mailing-List: linux-kernel@vger.kernel.org Pavel Machek wrote: > > Hi! > > For swsusp, I need to free as much memory as possible. Well, and it > would be great if no highmem pages remained, so that I would not have > to deal with that. Is that possible? No, it isn't. There are pagetable pages and mlocked user pages which we cannot do anything with. We could perhaps swap out the mlocked pages anyway if a suspend is in progress, but the highmem pagetable pages are not presently reclaimed by the VM.