Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753204AbYJFATS (ORCPT ); Sun, 5 Oct 2008 20:19:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751810AbYJFATE (ORCPT ); Sun, 5 Oct 2008 20:19:04 -0400 Received: from mail.lang.hm ([64.81.33.126]:59593 "EHLO bifrost.lang.hm" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751601AbYJFATD (ORCPT ); Sun, 5 Oct 2008 20:19:03 -0400 Date: Sun, 5 Oct 2008 17:19:28 -0700 (PDT) From: david@lang.hm X-X-Sender: dlang@asgard.lang.hm To: Mikulas Patocka cc: Nick Piggin , Andrew Morton , linux-kernel@vger.kernel.org, agk@redhat.com, mbroz@redhat.com, chris@arachsys.com Subject: Re: application syncing options (was Re: [PATCH] Memory management livelock) In-Reply-To: Message-ID: References: <20080911101616.GA24064@agk.fab.redhat.com> <20080923154905.50d4b0fa.akpm@linux-foundation.org> <200810031232.23836.nickpiggin@yahoo.com.au> <200810031254.29121.nickpiggin@yahoo.com.au> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 959 Lines: 23 On Sun, 5 Oct 2008, Mikulas Patocka wrote: > On Fri, 3 Oct 2008, david@lang.hm wrote: > >> I've also seen discussions of how the >> kernel filesystem code can do ordered writes without having to wait for them >> with the use of barriers, is this capability exported to userspace? if so, >> could you point me at documentation for it? > > It isn't. And it is good that it isn't --- the more complicated API, the > more maintenance work. I can understand that most software would not want to deal with complications like this, but for things thta have requirements similar to journaling filesystems (databases for example) it would seem that there would be advantages to exposing this capabilities. David Lang -- 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/