Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758150AbZIQQLN (ORCPT ); Thu, 17 Sep 2009 12:11:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755916AbZIQQLM (ORCPT ); Thu, 17 Sep 2009 12:11:12 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:43437 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754042AbZIQQLM (ORCPT ); Thu, 17 Sep 2009 12:11:12 -0400 Date: Thu, 17 Sep 2009 12:11:09 -0400 From: Christoph Hellwig To: James Bottomley Cc: Lars Ellenberg , Christoph Hellwig , linux-kernel@vger.kernel.org, drbd-dev@lists.linbit.com, Andrew Morton , Bart Van Assche , Dave Jones , Greg KH , Jens Axboe , KOSAKI Motohiro , Kyle Moffett , Lars Marowsky-Bree , Linus Torvalds , Neil Brown , "Nicholas A. Bellinger" , Nikanth Karthikesan , Philipp Reisner , Sam Ravnborg Subject: Re: [GIT PULL] DRBD for 2.6.32 Message-ID: <20090917161108.GA3361@infradead.org> References: <200909151645.14256.philipp.reisner@linbit.com> <20090915231931.GB7636@infradead.org> <20090917081251.GC8045@barkeeper1-xen.linbit> <1253203365.7845.14.camel@mulgrave.site> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1253203365.7845.14.camel@mulgrave.site> User-Agent: Mutt/1.5.19 (2009-01-05) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1448 Lines: 28 On Thu, Sep 17, 2009 at 10:02:45AM -0600, James Bottomley wrote: > So I think Christoph's NAK is rooted in the fact that we have a > proliferation of in-kernel RAID implementations and he's trying to > reunify them all again. > > As part of the review, reusing the kernel RAID (and actually logging) > logic did come up and you added it to your todo list. Perhaps expanding > on the status of that would help, since what's being looked for is that > you're not adding more work to the RAID reunification effort and that > you do have a plan and preferably a time frame for coming into sync with > it. Yes. RDBD has spend tons of time out of tree, and if they want to put it in now I think requiring them to do their homework is a good idea. Note that the in-kernel raid implementation is just a rather small part of this, what's much more important is the user interface. A big part of raid unification is that we can support on proper interface to deal with raid vs volume management, and DRBD adds another totally incompatible one to that. We'd be much better off adding the drbd in the write protocol (at least the most recent version) to DM instead of adding another big chunk of framework. -- 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/