Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262751AbVBYRqR (ORCPT ); Fri, 25 Feb 2005 12:46:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262763AbVBYRqR (ORCPT ); Fri, 25 Feb 2005 12:46:17 -0500 Received: from fire.osdl.org ([65.172.181.4]:2493 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S262751AbVBYRqO (ORCPT ); Fri, 25 Feb 2005 12:46:14 -0500 Date: Fri, 25 Feb 2005 09:45:25 -0800 From: Chris Wright To: Jay Lan Cc: Andrew Morton , Kaigai Kohei , lse-tech@lists.sourceforge.net, linux-kernel@vger.kernel.org, guillaume.thouvenin@bull.net, tim@physik3.uni-rostock.de, erikj@subway.americas.sgi.com, limin@dbear.engr.sgi.com, jbarnes@sgi.com Subject: Re: [Lse-tech] Re: A common layer for Accounting packages Message-ID: <20050225174525.GF28536@shell0.pdx.osdl.net> References: <42168D9E.1010900@sgi.com> <20050218171610.757ba9c9.akpm@osdl.org> <421993A2.4020308@ak.jp.nec.com> <421B955A.9060000@sgi.com> <421C2B99.2040600@ak.jp.nec.com> <421CEC38.7010008@sgi.com> <421EB299.4010906@ak.jp.nec.com> <20050224212839.7953167c.akpm@osdl.org> <421F6139.5020207@sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <421F6139.5020207@sgi.com> User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1123 Lines: 33 * Jay Lan (jlan@sgi.com) wrote: > Andrew Morton wrote: > >Kaigai Kohei wrote: > > > >>In my understanding, what Andrew Morton said is "If target functionality > >>can > >>implement in user space only, then we should not modify the kernel-tree". > > > > > >fork, exec and exit upcalls sound pretty good to me. As long as > > > >a) they use the same common machinery and > > > >b) they are next-to-zero cost if something is listening on the netlink > > socket but no accounting daemon is running. > > > >Question is: is this sufficient for CSA? > > Yes, fork, exec, and exit upcalls are sufficient for CSA. As soon as you want to throttle tasks at the Job level, this would be insufficient. But, IIRC, that's not one of PAGG/Job/CSA's requirements right? thanks, -chris -- Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net - 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/