From: Christoph Hellwig <hch@infradead.org>
To: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net,
linux-kernel@vger.kernel.org
Subject: Re: [net-next][PATCH v2 11/13] RDS: IB: add Fastreg MR (FRMR) detection support
Date: Sun, 28 Feb 2016 01:08:58 -0800 [thread overview]
Message-ID: <20160228090858.GB6671@infradead.org> (raw)
In-Reply-To: <1456625990-4739-12-git-send-email-santosh.shilimkar@oracle.com>
On Sat, Feb 27, 2016 at 06:19:48PM -0800, Santosh Shilimkar wrote:
> Discovere Fast Memmory Registration support using IB device
> IB_DEVICE_MEM_MGT_EXTENSIONS. Certain HCA might support just FRMR
> or FMR or both FMR and FRWR. In case both mr type are supported,
> default FMR is used.
>
> Default MR is still kept as FMR against what everyone else
> is following. Default will be changed to FRMR once the
> RDS performance with FRMR is comparable with FMR. The
> work is in progress for the same.
>
> Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
> ---
> v2: Dropped the module parameter as suggested by David Miller
This means we only use the safer method if the HCA doesn't support
the other one. All other RDMA ULP that support both methods have
a module_param so the veto from Dave is a bit unfortunate. Anyway,
let's get the code in for now and figure out what to use later.
Just curious: where / how do you see worse peformance using FRs?
next prev parent reply other threads:[~2016-02-28 9:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-28 2:19 [net-next][PATCH v2 00/13] RDS: Major clean-up with couple of new features for 4.6 Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 01/13] RDS: Drop stale iWARP RDMA transport Santosh Shilimkar
2016-02-28 9:05 ` Christoph Hellwig
2016-02-28 10:11 ` santosh.shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 02/13] RDS: Add support for SO_TIMESTAMP for incoming messages Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 03/13] MAINTAINERS: update RDS entry Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 04/13] RDS: IB: Remove the RDS_IB_SEND_OP dependency Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 05/13] RDS: IB: Re-organise ibmr code Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 06/13] RDS: IB: create struct rds_ib_fmr Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 07/13] RDS: IB: move FMR code to its own file Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 08/13] RDS: IB: add connection info to ibmr Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 09/13] RDS: IB: handle the RDMA CM time wait event Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 10/13] RDS: IB: add mr reused stats Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 11/13] RDS: IB: add Fastreg MR (FRMR) detection support Santosh Shilimkar
2016-02-28 9:08 ` Christoph Hellwig [this message]
2016-02-28 10:26 ` santosh.shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 12/13] RDS: IB: allocate extra space on queues for FRMR support Santosh Shilimkar
2016-02-28 2:19 ` [net-next][PATCH v2 13/13] RDS: IB: Support Fastreg MR (FRMR) memory registration mode Santosh Shilimkar
2016-03-01 22:33 ` [net-next][PATCH v2 00/13] RDS: Major clean-up with couple of new features for 4.6 David Miller
2016-03-01 23:09 ` santosh shilimkar
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