Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759590Ab0GVSH4 (ORCPT ); Thu, 22 Jul 2010 14:07:56 -0400 Received: from fn.samba.org ([216.83.154.106]:34053 "EHLO lists.samba.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752421Ab0GVSHw (ORCPT ); Thu, 22 Jul 2010 14:07:52 -0400 Date: Thu, 22 Jul 2010 11:07:51 -0700 From: Jeremy Allison To: Volker Lendecke Cc: Jeremy Allison , Trond Myklebust , Linus Torvalds , David Howells , Jan Engelhardt , linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org Subject: Re: [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available [ver #6] Message-ID: <20100722180751.GC32008@samba1> Reply-To: Jeremy Allison References: <30448.1279800887@redhat.com> <20100722162712.GB10352@jeremy-laptop> <1279817930.3621.14.camel@heimdal.trondhjem.org> <20100722180204.GA32008@samba1> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1270 Lines: 30 On Thu, Jul 22, 2010 at 08:04:41PM +0200, Volker Lendecke wrote: > On Thu, Jul 22, 2010 at 11:02:04AM -0700, Jeremy Allison wrote: > > On Thu, Jul 22, 2010 at 12:58:50PM -0400, Trond Myklebust wrote: > > > > > > That would make it impossible to export the filesystem with NFSv2 and > > > v3. They do rely on ctime checking for certain operations (e.g. deciding > > > when to invalidate access and acl caches). NFSv4 needs this too if the > > > filesystem has no dedicated change attribute. > > > > > > Still, I suppose the market for exporting the same filesystem with both > > > NFS and Samba is limited... > > > > Ask NetApp about that :-). They have built a rather large > > business on just that fact :-). > > Jeremy, how many hours have you spent getting "posix > locking" to the point where it is now? :-) > > Volker > > P.S: For those not aware, "posix locking = yes" is > cross-protocol byte range locking done by smbd to co-operate > with local processes and NFS. The time is counted in years, not hours :-). -- 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/