Return-Path: Received: from bombadil.infradead.org ([198.137.202.9]:36653 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751888AbbEYPOa (ORCPT ); Mon, 25 May 2015 11:14:30 -0400 Date: Mon, 25 May 2015 08:14:29 -0700 From: Christoph Hellwig To: Benjamin ESTRABAUD Cc: Christoph Hellwig , "linux-nfs@vger.kernel.org" , "bc@mpstor.com" Subject: Re: Issue running buffered writes to a pNFS (NFS 4.1 backed by SAN) filesystem. Message-ID: <20150525151429.GB18386@infradead.org> References: <41EB9782-8445-4FBB-A825-A484EFF7169C@mpstor.com> <20150517163841.GA19109@infradead.org> <555CB69B.7030108@mpstor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <555CB69B.7030108@mpstor.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Wed, May 20, 2015 at 05:30:19PM +0100, Benjamin ESTRABAUD wrote: > I'm going to try this now (move client and maybe even server to Linux 4.0, > now that 4.0 has a more "current" stable release). Only the client is interesting in this case. > By the way, what is the minimum Linux Kernel version required to connect to > a NFS v4.1 server using pNFS? We only managed to get this working with > kernel 4.0 (on the client) and it appears that this is the lowest kernel > release that supports pNFS block clients (working with Linux pNFS recent > block server). Could you please confirm this? The big changes to make the block client useful went into 3.18. Almost nothing has changed in the client since.