Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264974AbUD3Aer (ORCPT ); Thu, 29 Apr 2004 20:34:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265034AbUD3Aer (ORCPT ); Thu, 29 Apr 2004 20:34:47 -0400 Received: from fw.osdl.org ([65.172.181.6]:14475 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S264974AbUD3Aeq (ORCPT ); Thu, 29 Apr 2004 20:34:46 -0400 Date: Thu, 29 Apr 2004 17:32:23 -0700 From: Andrew Morton To: Andy Isaacson Cc: pj@sgi.com, vonbrand@inf.utfsm.cl, nickpiggin@yahoo.com.au, jgarzik@pobox.com, brettspamacct@fastclick.com, linux-kernel@vger.kernel.org Subject: Re: ~500 megs cached yet 2.6.5 goes into swap hell Message-Id: <20040429173223.3ea4d0c5.akpm@osdl.org> In-Reply-To: <20040430000408.GA29096@hexapodia.org> References: <40904A84.2030307@yahoo.com.au> <200404292001.i3TK1BYe005147@eeyore.valparaiso.cl> <20040429133613.791f9f9b.pj@sgi.com> <20040429141947.1ff81104.akpm@osdl.org> <20040429143403.35a7a550.pj@sgi.com> <20040429145725.267ea7b8.akpm@osdl.org> <20040430000408.GA29096@hexapodia.org> X-Mailer: Sylpheed version 0.9.7 (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: 766 Lines: 16 Andy Isaacson wrote: > > But in a related case, I have a background daemon that does a lot of IO > (mostly sequential, one page at a time read/modify/write of a multi-GB > file) to a filesystem on a separate spindle from my main filesystems. > I'd like to use a similar mechanism to say "don't let this program eat > my pagecache" that will let the daemon crunch away without severely > impacting my desktop work. fadvise(POSIX_FADV_DONTNEED) is ideal for this. Run it once per megabyte or so. - 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/