Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932479AbVKIKMw (ORCPT ); Wed, 9 Nov 2005 05:12:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932498AbVKIKMw (ORCPT ); Wed, 9 Nov 2005 05:12:52 -0500 Received: from gate.in-addr.de ([212.8.193.158]:9454 "EHLO mx.in-addr.de") by vger.kernel.org with ESMTP id S932479AbVKIKMw (ORCPT ); Wed, 9 Nov 2005 05:12:52 -0500 Date: Wed, 9 Nov 2005 11:12:21 +0100 From: Lars Marowsky-Bree To: Jens Axboe , Jeff Garzik Cc: Neil Brown , Linux Kernel Subject: Re: userspace block driver? Message-ID: <20051109101221.GM15967@marowsky-bree.de> References: <4371A4ED.9020800@pobox.com> <17265.42782.188870.907784@cse.unsw.edu.au> <4371A944.6070302@pobox.com> <20051109075455.GN3699@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20051109075455.GN3699@suse.de> X-Ctuhulu: HASTUR User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 989 Lines: 30 On 2005-11-09T08:54:56, Jens Axboe wrote: > > >>Has anybody put any thought towards how a userspace block driver ^^^^^^^^^ > > >>would work? > > I was going to say drbd, but then you did say more lightweight :-) ^^^^ drbd is implemented all in-kernel, too. The deadlock scenarios with running block IO through user-space are still somewhat unsolved, though. Not that block over network IO (in particular TCP) is much better even when implemented in-kernel... Sincerely, Lars Marowsky-Br?e -- High Availability & Clustering SUSE Labs, Research and Development SUSE LINUX Products GmbH - A Novell Business -- Charles Darwin "Ignorance more frequently begets confidence than does knowledge" - 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/