From: Christoph Hellwig Subject: Re: [NFS] [PATCH,RESEND] make knfsd interact cleanly with HSMs Date: Mon, 8 May 2006 18:55:15 +0100 Message-ID: <20060508175515.GA9662@infradead.org> References: <20060505115254.GA13916@sgi.com> <20060508064255.GA8614@infradead.org> <17503.10386.171006.392544@cse.unsw.edu.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Christoph Hellwig , Greg Banks , Linux NFS Mailing List , Linux Filesystem Mailing List Return-path: To: Neil Brown In-Reply-To: <17503.10386.171006.392544@cse.unsw.edu.au> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Mon, May 08, 2006 at 09:16:34PM +1000, Neil Brown wrote: > On Monday May 8, hch@infradead.org wrote: > > NACK. As long as we have no HSM support in the tree there's no reason to > > add this. From the kernel's point it's just untested and unused code that > > can break. > > > Greg: you seemed to suggest that there was already code in XFS that > could make use of this. If that is so: could you point us to it > please. It's used by SGI's out of tree dmapi implementation. Because dmapi is such an utterly braindead standard I don't expect anyone to submit a kernel-based implementation for inclusion, although support for a big enough subset of that standard could be archived by proper kernel <-> userspace cooperation.