Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 27 Sep 2002 13:37:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 27 Sep 2002 13:37:16 -0400 Received: from tapu.f00f.org ([66.60.186.129]:61830 "EHLO tapu.f00f.org") by vger.kernel.org with ESMTP id ; Fri, 27 Sep 2002 13:37:16 -0400 Date: Fri, 27 Sep 2002 10:42:35 -0700 From: Chris Wedgwood To: Ingo Molnar Cc: Linus Torvalds , Andrew Morton , Rusty Russell , linux-kernel@vger.kernel.org Subject: Re: [patch] 'virtual => physical page mapping cache', vcache-2.5.38-B8 Message-ID: <20020927174235.GB17458@tapu.f00f.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4i X-No-Archive: Yes Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 696 Lines: 17 On Fri, Sep 27, 2002 at 07:44:08PM +0200, Ingo Molnar wrote: > and i'm not quite sure how other users of get_user_pages() > (direct-IO) handle these kinds of COW races. O_DIRECT is allow to break if someone does something silly :) I think XFS tried hard to make sure things are consistent, but e2fs (at least at one point) allowed you to read data from a file O_DIRECT which was very different to what someone else read via the page-cache. --cw - 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/