Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751159AbWB0LS5 (ORCPT ); Mon, 27 Feb 2006 06:18:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751186AbWB0LS5 (ORCPT ); Mon, 27 Feb 2006 06:18:57 -0500 Received: from e4.ny.us.ibm.com ([32.97.182.144]:58266 "EHLO e4.ny.us.ibm.com") by vger.kernel.org with ESMTP id S1751159AbWB0LS5 (ORCPT ); Mon, 27 Feb 2006 06:18:57 -0500 Date: Mon, 27 Feb 2006 16:48:47 +0530 From: Balbir Singh To: Shailabh Nagar Cc: Arjan van de Ven , linux-kernel , lse-tech Subject: Re: [Lse-tech] Re: [Patch 4/7] Add sysctl for delay accounting Message-ID: <20060227111847.GC22492@in.ibm.com> Reply-To: balbir@in.ibm.com References: <1141026996.5785.38.camel@elinux04.optonline.net> <1141028322.5785.60.camel@elinux04.optonline.net> <1141028784.2992.58.camel@laptopd505.fenrus.org> <4402BA93.5010302@watson.ibm.com> <1141029743.2992.71.camel@laptopd505.fenrus.org> <4402BF80.70005@watson.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4402BF80.70005@watson.ibm.com> User-Agent: Mutt/1.5.10i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 630 Lines: 16 > But if task enumeration is going to get more difficult, we'll need to > keep the on-demand allocation (on > next use) as a backup for tasks that weren't caught during the sysctl > change. > One possible issue with on-demand allocation is that under heavy load allocation causes IO to happen and when we try to timestamp that IO, we do not have a delays structure to do so. Balbir - 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/