Return-Path: linux-nfs-owner@vger.kernel.org Received: from bombadil.infradead.org ([198.137.202.9]:48587 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753626Ab3JCOV2 (ORCPT ); Thu, 3 Oct 2013 10:21:28 -0400 Date: Thu, 3 Oct 2013 07:21:27 -0700 From: Christoph Hellwig To: Benny Halevy Cc: Ric Wheeler , Christoph Hellwig , "J. Bruce Fields" , linux-nfs@vger.kernel.org, Steven Whitehouse , Bob Peterson , Abhijith Das , Andrew Price , Paul Evans Subject: Re: [PATCH RFC v0 05/49] pnfsd: introduce pnfsd header files Message-ID: <20131003142127.GA16716@infradead.org> References: <20131001203047.GH16245@pad.fieldses.org> <524C0556.9070705@primarydata.com> <20131002160759.GB27988@infradead.org> <524D0873.40602@primarydata.com> <20131003095511.GA30147@infradead.org> <524D6312.7020709@primarydata.com> <524D6D38.1040506@redhat.com> <20131003131750.GA23408@infradead.org> <524D6EB9.3040309@redhat.com> <524D7CF3.6020306@primarydata.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <524D7CF3.6020306@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Thu, Oct 03, 2013 at 05:19:31PM +0300, Benny Halevy wrote: > The question is what is the minimum value for submitting upstream... > > The thing pnfs over dlm/gfs2 is missing mostly is supporting read/write layout. > One could use them load balancing, e.g. by either redirecting to a node > holding an exclusive lock on the file, if there is one, or dlm_ino_hash in its absence. One could do a lot of things, especially given infinite time. But what does the current code buy us? We need data on that to justify merging such a large chunk of code.