Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754253Ab0L3OrH (ORCPT ); Thu, 30 Dec 2010 09:47:07 -0500 Received: from keetweej.vanheusden.com ([83.163.219.98]:59422 "EHLO keetweej.vanheusden.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752574Ab0L3OrF (ORCPT ); Thu, 30 Dec 2010 09:47:05 -0500 X-Greylist: delayed 572 seconds by postgrey-1.27 at vger.kernel.org; Thu, 30 Dec 2010 09:47:05 EST Date: Thu, 30 Dec 2010 15:37:31 +0100 From: folkert To: linux-kernel@vger.kernel.org Subject: block device without page cache buffering Message-ID: <20101230143731.GO9658@belle.intranet.vanheusden.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Organization: www.unixexpert.nl X-Chameleon-Return-To: folkert@vanheusden.com X-Xfmail-Return-To: folkert@vanheusden.com X-Phonenumber: +31-6-41278122 X-URL: http://www.vanheusden.com/ X-PGP-KeyID: 1F28D8AE X-GPG-fingerprint: AC89 09CE 41F2 00B4 FCF2 B174 3019 0E8C 1F28 D8AE X-Key: http://pgp.surfnet.nl:11371/pks/lookup?op=get&search=0x1F28D8AE Read-Receipt-To: Reply-By: Wed Dec 22 20:04:01 CET 2010 X-Message-Flag: PGP key-id: 0x1f28d8ae - consider encrypting your e-mail to me with PGP! User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 836 Lines: 21 Hi, What should a block device driver need to do to get all read/write requests without any buffering from the page cache? I think the iscsi initiation does this. This is needed to get an existing pseudo block device to function as a shared storage so that a cluster filesystem (gpfs/ocfs) can be put on it (nbd). Folkert van Heusden -- Nagios user? Check out CoffeeSaint - the versatile Nagios status viewer! http://www.vanheusden.com/java/CoffeeSaint/ ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com -- 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/