Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932133AbWC1Ugh (ORCPT ); Tue, 28 Mar 2006 15:36:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932168AbWC1Ugh (ORCPT ); Tue, 28 Mar 2006 15:36:37 -0500 Received: from mx1.redhat.com ([66.187.233.31]:47832 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S932133AbWC1Ugg (ORCPT ); Tue, 28 Mar 2006 15:36:36 -0500 To: prasanna@in.ibm.com Cc: Arjan van de Ven , Andrew Morton , Andi Kleen , davem@davemloft.net, suparna@in.ibm.com, richardj_moore@uk.ibm.com, linux-kernel@vger.kernel.org, Christoph Hellwig , "Theodore Ts'o" , Nick Piggin Subject: Re: RFC - Approaches to user-space probes References: <20060327065447.GA25745@in.ibm.com> <1143445068.2886.20.camel@laptopd505.fenrus.org> <20060327100019.GA30427@in.ibm.com> <1143489794.2886.43.camel@laptopd505.fenrus.org> <20060328145441.GA25465@in.ibm.com> From: fche@redhat.com (Frank Ch. Eigler) Date: 28 Mar 2006 15:35:43 -0500 In-Reply-To: <20060328145441.GA25465@in.ibm.com> Message-ID: User-Agent: Gnus/5.0808 (Gnus v5.8.8) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 789 Lines: 15 Prasanna S Panchamukhi writes: > [...] > If the executable is mmaped shared, then those mappings will get written > back to the disk. > Writting to the disk is not the requirement for user-space probes, it is > just the side effect [...] It's pretty clear that writing the dirtied pages to disk is an *undesirable* side-effect, and should be eliminated. (Among many other scenarios, imagine a kernel shutting down without all the probes being cleanly removed. Then the executables are irretrievably corrupted.) - FChE - 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/