From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750935AbWDTRkk (ORCPT ); Thu, 20 Apr 2006 13:40:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751039AbWDTRkk (ORCPT ); Thu, 20 Apr 2006 13:40:40 -0400 Received: from tetsuo.zabbo.net ([207.173.201.20]:19633 "EHLO tetsuo.zabbo.net") by vger.kernel.org with ESMTP id S1750876AbWDTRkj (ORCPT ); Thu, 20 Apr 2006 13:40:39 -0400 Message-ID: <4447C791.2070901@oracle.com> Date: Thu, 20 Apr 2006 10:40:33 -0700 From: Zach Brown User-Agent: Thunderbird 1.5 (X11/20060313) MIME-Version: 1.0 To: David Howells CC: torvalds@osdl.org, akpm@osdl.org, steved@redhat.com, sct@redhat.com, aviro@redhat.com, linux-fsdevel@vger.kernel.org, linux-cachefs@redhat.com, nfsv4@linux-nfs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 2/7] FS-Cache: Add notification of page becoming writable to VMA ops References: <20060420165927.9968.33912.stgit@warthog.cambridge.redhat.com> <20060420165930.9968.60742.stgit@warthog.cambridge.redhat.com> In-Reply-To: <20060420165930.9968.60742.stgit@warthog.cambridge.redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org David Howells wrote: > The attached patch adds a new VMA operation to notify a filesystem or other > driver about the MMU generating a fault because userspace attempted to write > to a page mapped through a read-only PTE. This will almost certainly help OCFS2 get shared writable mmap() right, too, though it probably won't be the whole story. - z