Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262916AbVD2Tx5 (ORCPT ); Fri, 29 Apr 2005 15:53:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262917AbVD2Tx5 (ORCPT ); Fri, 29 Apr 2005 15:53:57 -0400 Received: from pat.uio.no ([129.240.130.16]:16083 "EHLO pat.uio.no") by vger.kernel.org with ESMTP id S262916AbVD2Txz (ORCPT ); Fri, 29 Apr 2005 15:53:55 -0400 Subject: Re: which ioctls matter across filesystems From: Trond Myklebust To: Steve French Cc: linux-kernel@vger.kernel.org In-Reply-To: <42728964.8000501@austin.rr.com> References: <42728964.8000501@austin.rr.com> Content-Type: text/plain Date: Fri, 29 Apr 2005 15:53:45 -0400 Message-Id: <1114804426.12692.49.camel@lade.trondhjem.org> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 Content-Transfer-Encoding: 7bit X-UiO-Spam-info: not spam, SpamAssassin (score=-3.82, required 12, autolearn=disabled, AWL 1.18, UIO_MAIL_IS_INTERNAL -5.00) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1540 Lines: 33 fr den 29.04.2005 Klokka 14:22 (-0500) skreiv Steve French: > The new inotify mechanism being prototyped in -mm currently is the other > one which needs work to determine how to map it across the network. > Since it was added for support of Samba, the corresponding client part > (for cifs) may turn out to map to the network protocol quite well > already, and given NFSv4 having various similarities to CIFS, it would > be interesting if the semantics of inotify would map to NFSv4 write > protocol. We are discussing the equivalent of dnotify as a potential candidate for the first minor version of NFSv4, but not inotify. The purpose of our dnotify implementation is address the needs of things like file browsers that don't really care about synchronous notification of changes, but that do currently cause a lot of unnecessary traffic on the wire due to constantly polling stat() and doing readdir() updates. The jury is still out as to whether or not the callbacks actually do reduce on-the-wire traffic, though, so we may drop it. What kind of real-world applications exist out there that need inotify functionality, and what sort of requirements do they have (in particular w.r.t. the notification mechanism)? Cheers, Trond -- Trond Myklebust - 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/