From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 27 Aug 2002 07:37:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 27 Aug 2002 07:37:06 -0400 Received: from zeus.kernel.org ([204.152.189.113]:60563 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id ; Tue, 27 Aug 2002 07:37:06 -0400 Date: Tue, 27 Aug 2002 13:28:05 +0200 Message-Id: <200208271128.g7RBS5430654@oboe.it.uc3m.es> From: "Peter T. Breuer" To: linux-kernel@vger.kernel.org Subject: Re: block device/VM question Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org PTB wrote: > Is there any way of turning off VMS caching for a block device? Well, I've been reading the 2.5.31 code, and it looks like if the block device node is opened O_DIRECT and it has an i_mapping->a_ops->direct_IO method, then file systems will use it for read/write and won't go thorgh VMS. I'll investigate. Does anyone have a pointer for where to go in the 2.4 code? Peter