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From: Jinpu Wang <jinpu.wang@cloud.ionos.com>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jack Wang <jinpuwang@gmail.com>,
	linux-block@vger.kernel.org, linux-rdma@vger.kernel.org,
	Jens Axboe <axboe@kernel.dk>,
	Christoph Hellwig <hch@infradead.org>,
	Sagi Grimberg <sagi@grimberg.me>,
	Bart Van Assche <bvanassche@acm.org>,
	Leon Romanovsky <leon@kernel.org>,
	Doug Ledford <dledford@redhat.com>,
	Danil Kipnis <danil.kipnis@cloud.ionos.com>,
	rpenyaev@suse.de
Subject: Re: [PATCH v5 00/25] RTRS (former IBTRS) rdma transport library and the corresponding RNBD (former IBNBD) rdma network block device
Date: Fri, 3 Jan 2020 13:39:29 +0100
Message-ID: <CAMGffE=h24jmi0RnYks_rur71qrXCxJnPB5+cCACR50hKF6QRA@mail.gmail.com> (raw)
In-Reply-To: <20200102181859.GC9282@ziepe.ca>

On Thu, Jan 2, 2020 at 7:19 PM Jason Gunthorpe <jgg@ziepe.ca> wrote:
>
> On Fri, Dec 20, 2019 at 04:50:44PM +0100, Jack Wang wrote:
> > Hi all,
> >
> > here is V5 of the RTRS (former IBTRS) rdma transport library and the
> > corresponding RNBD (former IBNBD) rdma network block device.
> >
> > Main changes are the following:
> > 1. Fix the security problem pointed out by Jason
> > 2. Implement code-style/readability/API/etc suggestions by Bart van Assche
> > 3. Rename IBTRS and IBNBD to RTRS and RNBD accordingly
> > 4. Fileio mode support in rnbd-srv has been removed.
> >
> > The main functional change is a fix for the security problem pointed out by
> > Jason and discussed both on the mailing list and during the last LPC RDMA MC 2019.
> > On the server side we now invalidate in RTRS each rdma buffer before we hand it
> > over to RNBD server and in turn to the block layer. A new rkey is generated and
> > registered for the buffer after it returns back from the block layer and RNBD
> > server. The new rkey is sent back to the client along with the IO result.
> > The procedure is the default behaviour of the driver. This invalidation and
> > registration on each IO causes performance drop of up to 20%. A user of the
> > driver may choose to load the modules with this mechanism switched
> > off
>
> So, how does this compare now to nvme over fabrics?
>
> I recall there were questiosn why we needed yet another RDMA block
> transport?
>
> Jason
Performance results for the v5.5-rc1 kernel are here:
  link: https://github.com/ionos-enterprise/ibnbd/tree/develop/performance/v5-v5.5-rc1

Some workloads RNBD are faster, some workloads NVMeoF are faster.

  reply index

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-20 15:50 Jack Wang
2019-12-20 15:50 ` [PATCH v5 01/25] sysfs: export sysfs_remove_file_self() Jack Wang
2019-12-20 16:26   ` Jinpu Wang
2019-12-20 15:50 ` [PATCH v5 02/25] rtrs: public interface header to establish RDMA connections Jack Wang
2019-12-21 10:15   ` Leon Romanovsky
2019-12-21 14:27     ` Danil Kipnis
2019-12-22  7:36       ` Leon Romanovsky
2019-12-23  7:38         ` Jinpu Wang
2019-12-23  8:04           ` Leon Romanovsky
2019-12-23 10:31             ` Jinpu Wang
2019-12-20 15:50 ` [PATCH v5 03/25] rtrs: private headers with rtrs protocol structs and helpers Jack Wang
2019-12-20 15:50 ` [PATCH v5 04/25] rtrs: core: lib functions shared between client and server modules Jack Wang
2019-12-20 15:50 ` [PATCH v5 05/25] rtrs: client: private header with client structs and functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 06/25] rtrs: client: main functionality Jack Wang
2019-12-20 15:50 ` [PATCH v5 07/25] rtrs: client: statistics functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 08/25] rtrs: client: sysfs interface functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 09/25] rtrs: server: private header with server structs and functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 10/25] rtrs: server: main functionality Jack Wang
2019-12-20 15:50 ` [PATCH v5 11/25] rtrs: server: statistics functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 12/25] rtrs: server: sysfs interface functions Jack Wang
2019-12-20 15:50 ` [PATCH v5 13/25] rtrs: include client and server modules into kernel compilation Jack Wang
2019-12-20 15:50 ` [PATCH v5 14/25] rtrs: a bit of documentation Jack Wang
2019-12-20 15:50 ` [PATCH v5 15/25] rnbd: private headers with rnbd protocol structs and helpers Jack Wang
2019-12-20 15:51 ` [PATCH v5 16/25] rnbd: client: private header with client structs and functions Jack Wang
2019-12-20 15:51 ` [PATCH v5 17/25] rnbd: client: main functionality Jack Wang
2019-12-20 15:51 ` [PATCH v5 18/25] rnbd: client: sysfs interface functions Jack Wang
2019-12-20 15:51 ` [PATCH v5 19/25] rnbd: server: private header with server structs and functions Jack Wang
2019-12-20 15:51 ` [PATCH v5 20/25] rnbd: server: main functionality Jack Wang
2019-12-20 15:51 ` [PATCH v5 21/25] rnbd: server: functionality for IO submission to file or block dev Jack Wang
2019-12-20 15:51 ` [PATCH v5 22/25] rnbd: server: sysfs interface functions Jack Wang
2019-12-23  8:14   ` Leon Romanovsky
2019-12-23  8:33     ` Jinpu Wang
2019-12-20 15:51 ` [PATCH v5 23/25] rnbd: include client and server modules into kernel compilation Jack Wang
2019-12-20 15:51 ` [PATCH v5 24/25] rnbd: a bit of documentation Jack Wang
2019-12-20 15:51 ` [PATCH v5 25/25] MAINTAINERS: Add maintainers for RNBD/RTRS modules Jack Wang
2019-12-22  9:55   ` Gal Pressman
2019-12-23  7:20     ` Jinpu Wang
2019-12-21 10:17 ` [PATCH v5 00/25] RTRS (former IBTRS) rdma transport library and the corresponding RNBD (former IBNBD) rdma network block device Leon Romanovsky
2020-01-02 18:18 ` Jason Gunthorpe
2020-01-03 12:39   ` Jinpu Wang [this message]
2020-01-03 16:28     ` Bart Van Assche
2020-01-06 17:07       ` Jinpu Wang
2020-01-07 10:56         ` Jinpu Wang
2020-01-16 16:41           ` Bart Van Assche
2020-01-16 16:46             ` Jinpu Wang

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