Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 5 Nov 2001 14:00:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 5 Nov 2001 14:00:21 -0500 Received: from mnh-1-11.mv.com ([207.22.10.43]:60166 "EHLO ccure.karaya.com") by vger.kernel.org with ESMTP id ; Mon, 5 Nov 2001 14:00:09 -0500 Message-Id: <200111052018.PAA03082@ccure.karaya.com> X-Mailer: exmh version 2.0.2 To: Andrea Arcangeli Cc: Ryan Cumming , linux-kernel@vger.kernel.org Subject: Re: Special Kernel Modification In-Reply-To: Your message of "Mon, 05 Nov 2001 17:53:37 +0100." <20011105175337.D18319@athlon.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 05 Nov 2001 15:18:42 -0500 From: Jeff Dike Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org andrea@suse.de said: > O_DIRECT is synchronous but only in terms of data, if you want the > metadata to be synchronous as well you need to open with > O_SYNC|O_DIRECT, and even in such case all the metadata reads will > came from cache. That's OK. The goal is to cram as many UMLs onto a host as possible by eliminating caching as much as possible. If the metadata/data ratio is small, then the metadata caching probably won't be noticable. Jeff - 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/