From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933104AbXCCWTR (ORCPT ); Sat, 3 Mar 2007 17:19:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933134AbXCCWTQ (ORCPT ); Sat, 3 Mar 2007 17:19:16 -0500 Received: from mx1.redhat.com ([66.187.233.31]:58972 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933104AbXCCWTQ (ORCPT ); Sat, 3 Mar 2007 17:19:16 -0500 Message-ID: <45E9F454.2080600@redhat.com> Date: Sat, 03 Mar 2007 17:19:00 -0500 From: Rik van Riel Organization: Red Hat, Inc User-Agent: Thunderbird 1.5.0.7 (X11/20061008) MIME-Version: 1.0 To: Andrew Morton CC: bert hubert , linux-kernel@vger.kernel.org Subject: Re: userspace pagecache management tool References: <20070303122935.f1ab0067.akpm@linux-foundation.org> <45E9DD4A.2060806@redhat.com> <20070303131204.6706a95c.akpm@linux-foundation.org> <45E9E910.2070804@redhat.com> <20070303214108.GA28961@outpost.ds9a.nl> <20070303141448.1ed70e6d.akpm@linux-foundation.org> In-Reply-To: <20070303141448.1ed70e6d.akpm@linux-foundation.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andrew Morton wrote: > On Sat, 3 Mar 2007 22:41:09 +0100 bert hubert wrote: > >>> How can you make global policy decisions based on the intent >>> of one program? >> By not doing so. > > yup. > >> Andrew's program is fine in principle, except that the >> linux kernel treats the communication of a program's intent as a global >> instruction. > > argh. > > That felt good - let's do it again. > > argh. > > > It is *not* a global instruction. It uses setenv, so the user's policy > affects only the target process and its forked children. ... and all other processes accessing the same file(s)! Your library and the system calls may be limited to one process, but the consequences are global. -- Politics is the struggle between those who want to make their country the best in the world, and those who believe it already is. Each group calls the other unpatriotic.