From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261336AbUBUIE2 (ORCPT ); Sat, 21 Feb 2004 03:04:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261524AbUBUIE2 (ORCPT ); Sat, 21 Feb 2004 03:04:28 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:57773 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S261336AbUBUIE1 (ORCPT ); Sat, 21 Feb 2004 03:04:27 -0500 Date: Sat, 21 Feb 2004 08:04:26 +0000 From: viro@parcelfarce.linux.theplanet.co.uk To: Ingo Molnar Cc: Linus Torvalds , Tridge , Jamie Lokier , "H. Peter Anvin" , Kernel Mailing List Subject: Re: explicit dcache <-> user-space cache coherency, sys_mark_dir_clean(), O_CLEAN Message-ID: <20040221080426.GO31035@parcelfarce.linux.theplanet.co.uk> References: <20040219163838.GC2308@mail.shareable.org> <20040219182948.GA3414@mail.shareable.org> <20040220120417.GA4010@elte.hu> <20040220170438.GA19722@elte.hu> <20040220184822.GA23460@elte.hu> <20040221075853.GA828@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040221075853.GA828@elte.hu> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Feb 21, 2004 at 08:58:53AM +0100, Ingo Molnar wrote: > filesystems that dont have 64-bit, monotonic timestamps will return > -ENOSYS. This should include even XFS at the moment, because the > timestamp is not guaranteed to be monotonic. > any other problems with this concept? If we are demanding specific filesystems, we could simply say "use JFS in case-insensitive mode" and be done with that. Which deals with all problems, since fs code will guarantee uniqueness, etc.