Linux-RDMA Archive on lore.kernel.org
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From: Jason Gunthorpe <jgg@nvidia.com>
To: David Laight <David.Laight@ACULAB.COM>
Cc: 'Tom Talpey' <tom@talpey.com>,
	Haakon Bugge <haakon.bugge@oracle.com>,
	Chuck Lever III <chuck.lever@oracle.com>,
	Christoph Hellwig <hch@lst.de>, Leon Romanovsky <leon@kernel.org>,
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	Leon Romanovsky <leonro@nvidia.com>,
	Adit Ranadive <aditr@vmware.com>,
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Subject: Re: [PATCH rdma-next 00/10] Enable relaxed ordering for ULPs
Date: Wed, 14 Apr 2021 11:49:07 -0300
Message-ID: <20210414144907.GD1370958@nvidia.com> (raw)
In-Reply-To: <c2318ee1464a4d1c8439699cb0652d12@AcuMS.aculab.com>

On Wed, Apr 14, 2021 at 02:41:52PM +0000, David Laight wrote:

> So whatever driver initialises the target needs to configure whatever
> target-specific register enables the RO transfers themselves.

RDMA in general, and mlx5 in particular, is a layered design:

mlx5_core <- owns the PCI function, should turn on RO at the PCI
             function level
 mlx5_en  <- Commands the chip to use RO for queues used in ethernet
ib_core
  ib_uverbs
    mlx5_ib <- Commands the chip to use RO for some queues used in
               userspace
  ib_srp* <- A ULP driver built on RDMA - this patch commands the chip
             to use RO on SRP queues
  nvme-rdma <- Ditto
  ib_iser <- Ditto
  rds <- Ditto

So this series is about expanding the set of queues running on mlx5
that have RO turned when the PCI function is already running with RO
enabled.

We want as many queues as possible RO enabled because it brings big
performance wins

Jason

  reply index

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-05  5:23 Leon Romanovsky
2021-04-05  5:23 ` [PATCH rdma-next 01/10] RDMA: Add access flags to ib_alloc_mr() and ib_mr_pool_init() Leon Romanovsky
2021-04-05 13:46   ` Christoph Hellwig
2021-04-06  5:24     ` Leon Romanovsky
2021-04-05 15:27   ` Bart Van Assche
2021-04-06  5:23     ` Leon Romanovsky
2021-04-06  5:27       ` Christoph Hellwig
2021-04-06  5:58         ` Leon Romanovsky
2021-04-06 12:13           ` Jason Gunthorpe
2021-04-06 12:30             ` Christoph Hellwig
2021-04-06 14:04               ` Jason Gunthorpe
2021-04-06 14:15                 ` Christoph Hellwig
2021-04-06 14:40                   ` Jason Gunthorpe
2021-04-06 14:54                     ` Christoph Hellwig
2021-04-06 15:03                       ` Christoph Hellwig
2021-04-07 18:28                       ` Jason Gunthorpe
2021-04-05  5:23 ` [PATCH rdma-next 02/10] RDMA/core: Enable Relaxed Ordering in __ib_alloc_pd() Leon Romanovsky
2021-04-05 18:01   ` Tom Talpey
2021-04-05 20:40     ` Adit Ranadive
2021-04-06  6:28     ` Leon Romanovsky
2021-04-05  5:23 ` [PATCH rdma-next 03/10] RDMA/iser: Enable Relaxed Ordering Leon Romanovsky
2021-04-05  5:23 ` [PATCH rdma-next 04/10] RDMA/rtrs: " Leon Romanovsky
2021-04-05  5:23 ` [PATCH rdma-next 05/10] RDMA/srp: " Leon Romanovsky
2021-04-05  5:24 ` [PATCH rdma-next 06/10] nvme-rdma: " Leon Romanovsky
2021-04-05  5:24 ` [PATCH rdma-next 07/10] cifs: smbd: " Leon Romanovsky
2021-04-05  5:24 ` [PATCH rdma-next 08/10] net/rds: " Leon Romanovsky
2021-04-05  5:24 ` [PATCH rdma-next 09/10] net/smc: " Leon Romanovsky
2021-04-05  5:24 ` [PATCH rdma-next 10/10] xprtrdma: " Leon Romanovsky
2021-04-05 13:41 ` [PATCH rdma-next 00/10] Enable relaxed ordering for ULPs Christoph Hellwig
2021-04-05 14:08   ` Leon Romanovsky
2021-04-05 16:11     ` Santosh Shilimkar
2021-04-05 17:54     ` Tom Talpey
2021-04-05 20:07   ` Jason Gunthorpe
2021-04-05 23:42     ` Chuck Lever III
2021-04-05 23:50       ` Keith Busch
2021-04-06  5:12       ` Leon Romanovsky
2021-04-06 11:49       ` Jason Gunthorpe
2021-04-09 14:26         ` Tom Talpey
2021-04-09 14:45           ` Chuck Lever III
2021-04-09 15:32             ` Tom Talpey
2021-04-09 16:27               ` Haakon Bugge
2021-04-09 17:49                 ` Tom Talpey
2021-04-10 13:30                   ` David Laight
2021-04-12 18:32                     ` Haakon Bugge
2021-04-12 20:20                       ` Tom Talpey
2021-04-12 22:48                         ` Jason Gunthorpe
2021-04-14 14:16                           ` Tom Talpey
2021-04-14 14:41                             ` David Laight
2021-04-14 14:49                               ` Jason Gunthorpe [this message]
2021-04-14 14:44                             ` Jason Gunthorpe
2021-04-09 16:40           ` Jason Gunthorpe
2021-04-09 17:44             ` Tom Talpey
2021-04-06  2:37 ` Honggang LI
2021-04-06  5:09   ` Leon Romanovsky
2021-04-06 11:53     ` Jason Gunthorpe
2021-04-11 10:09       ` Max Gurtovoy

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