Return-Path: Received: from bombadil.infradead.org ([198.137.202.9]:49181 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964923AbcDLOPf (ORCPT ); Tue, 12 Apr 2016 10:15:35 -0400 Date: Tue, 12 Apr 2016 07:15:33 -0700 From: Christoph Hellwig To: Chuck Lever Cc: Steve Wise , linux-rdma@vger.kernel.org, Linux NFS Mailing List Subject: Re: [PATCH v1 05/18] xprtrdma: Avoid using Write list for small NFS READ requests Message-ID: <20160412141533.GA16218@infradead.org> References: <20160411200323.20531.8893.stgit@manet.1015granger.net> <20160411201050.20531.53651.stgit@manet.1015granger.net> <033901d19431$b3725d20$1a571760$@opengridcomputing.com> <65CBC59F-3005-44FE-8C70-9DDBC8507C9E@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <65CBC59F-3005-44FE-8C70-9DDBC8507C9E@oracle.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Mon, Apr 11, 2016 at 04:38:44PM -0400, Chuck Lever wrote: > No, pre-4.2 Linux servers have a bug that can be fixed by > applying the above commit, which shouldn't be difficult to > backport. > > Clients have always been allowed to send NFS READ this way. But the clients might be out in a the wild. I think we'll need at least a mount option to work around them.