From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755334AbYDHUXo (ORCPT ); Tue, 8 Apr 2008 16:23:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752907AbYDHUXg (ORCPT ); Tue, 8 Apr 2008 16:23:36 -0400 Received: from relay2.sgi.com ([192.48.171.30]:33474 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753067AbYDHUXf (ORCPT ); Tue, 8 Apr 2008 16:23:35 -0400 Date: Tue, 8 Apr 2008 13:23:33 -0700 (PDT) From: Christoph Lameter X-X-Sender: clameter@schroedinger.engr.sgi.com To: Andrea Arcangeli cc: Robin Holt , "Paul E. McKenney" , kvm-devel@lists.sourceforge.net, Peter Zijlstra , general@lists.openfabrics.org, steiner@sgi.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [patch 02/10] emm: notifier logic In-Reply-To: <20080407071330.GH9309@duo.random> Message-ID: References: <20080404223048.374852899@sgi.com> <20080404223131.469710551@sgi.com> <20080405005759.GH14784@duo.random> <20080407060602.GE9309@duo.random> <20080407071330.GH9309@duo.random> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It may also be useful to allow invalidate_start() to fail in some contexts (try_to_unmap f.e., maybe if a certain flag is passed). This may allow the device to get out of tight situations (pending I/O f.e. or time out if there is no response for network communications). But then that complicates the API.