Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 10 Dec 2001 13:10:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 10 Dec 2001 13:10:18 -0500 Received: from mpdr0.detroit.mi.ameritech.net ([206.141.239.206]:20914 "EHLO mailhost.det.ameritech.net") by vger.kernel.org with ESMTP id ; Mon, 10 Dec 2001 13:10:10 -0500 Date: Mon, 10 Dec 2001 13:08:17 -0500 (EST) From: volodya@mindspring.com Reply-To: volodya@mindspring.com To: Rik van Riel cc: Alan Cox , linux-kernel@vger.kernel.org Subject: Re: mm question In-Reply-To: Message-ID: 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 On Mon, 10 Dec 2001, Rik van Riel wrote: > On Mon, 10 Dec 2001 volodya@mindspring.com wrote: > > On Mon, 10 Dec 2001, Alan Cox wrote: > > > > > > I don't want to move them - I just want to collect all that are free and > > > > then try to free some more. > > > > > > How will you free them, you don't know who owns them. > > > > I think you misunderstood me - this allocation happens in response to > > the system call _not_ in an interrupt handler. So it is ok to wait - > > as long as needed. I was thinking of calling page swapper or something > > and perhaps going after I/O buffers first. > > Even if you have a handle on a physical page, you don't know > what processes are using the page, nor if there are additional > users besides the processes. > > This makes it rather hard to go around trying to free pages > within a certain physical range. Well, what does kernel do when it runs out of memory ? For example when I mmap a large file and start reading it back and force ? Vladimir Dergachev > > cheers, > > Rik > -- > DMCA, SSSCA, W3C? Who cares? http://thefreeworld.net/ > > http://www.surriel.com/ http://distro.conectiva.com/ > - 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/