From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030491AbXCCW24 (ORCPT ); Sat, 3 Mar 2007 17:28:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030499AbXCCW24 (ORCPT ); Sat, 3 Mar 2007 17:28:56 -0500 Received: from mx1.redhat.com ([66.187.233.31]:33355 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030491AbXCCW2z (ORCPT ); Sat, 3 Mar 2007 17:28:55 -0500 Message-ID: <45E9F693.3060200@redhat.com> Date: Sat, 03 Mar 2007 17:28:35 -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> <45E9F454.2080600@redhat.com> <20070303142609.d3bc9cc3.akpm@linux-foundation.org> In-Reply-To: <20070303142609.d3bc9cc3.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, 03 Mar 2007 17:19:00 -0500 Rik van Riel wrote: > >>> 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. > > Yes. So what? If the user wants to go and evict libc.so from pagecache > then he can do so - the kernel has provided syscalls with which this can be > done for at least seven years. Bad user, shouldn't do that. Are you saying the user should not use your script with their backup program? Then what's the point? -- 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.