From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751837AbeFDERy (ORCPT ); Mon, 4 Jun 2018 00:17:54 -0400 Received: from mail-lf0-f68.google.com ([209.85.215.68]:42018 "EHLO mail-lf0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750779AbeFDERw (ORCPT ); Mon, 4 Jun 2018 00:17:52 -0400 X-Google-Smtp-Source: ADUXVKIFTgGd4D0UEwOryO85mnBB68mL6kEXIEBFkmQIVMPXUGSxLG6FEgCTqVBdEsuvmmlxtZm99A== Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: [lustre-devel] [PATCH] staging: lustre: delete the filesystem from the tree. From: Alexey Lyashkov In-Reply-To: Date: Mon, 4 Jun 2018 07:17:48 +0300 Cc: NeilBrown , Andreas Dilger , "devel@driverdev.osuosl.org" , Oleg Drokin , Greg Kroah-Hartman , Linux Kernel Mailing List , Christoph Hellwig , "selinux@tycho.nsa.gov" , fsdevel , lustre-devel Message-Id: <271C72E6-27C0-425F-B43F-16A37C638DCB@gmail.com> References: <20180601091133.GA27521@kroah.com> <20180601114151.GA25225@infradead.org> <29ACF5A8-7608-46BB-8191-E3FEB77D0F24@cray.com> <87h8mmrt6b.fsf@notabene.neil.brown.name> <58123CDD-8424-4E1D-A11F-0F899970A49B@intel.com> <87h8mjp5o0.fsf@notabene.neil.brown.name> To: Andreas Dilger X-Mailer: Apple Mail (2.3273) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id w544Hwin012572 > 4 июня 2018 г., в 7:15, Andreas Dilger написал(а): > > On Jun 3, 2018, at 9:59 PM, Alexey Lyashkov wrote: >> >>> On Sun, Jun 03 2018, Dilger, Andreas wrote: >>> >>>> LNet is originally based on a high-performance networking stack called >>>> Portals (v3, http://www.cs.sandia.gov/Portals/), with additions for LNet >>>> routing to allow cross-network bridging. >>>> >>>> A critical part of LNet is that it is for RDMA and not packet-based >>>> messages. Everything in Lustre is structured around RDMA. Of course, >>>> RDMA is not possible with TCP >> >> To be clear. Soft IB (aka Soft RoCE) driver is part of OFED stack from 4.8 >> (or 4.9). So RDMA API now is possible with TCP networks. > > Well, strictly speaking RoCE still isn't possible with TCP networks. RoCE v1 > is an Ethernet layer protocol (not IP based), while RoCE v2 is UDP/IP based. > > Andreas, I talk about RXE driver in OFED stack. It have works over TCP networks. It likely to be RoCE v2 compatible as UDP tunnel use and exist for while. Alex