From: Jason Gunthorpe <jgg@ziepe.ca>
To: longli@microsoft.com
Cc: "K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Leon Romanovsky <leon@kernel.org>,
linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org
Subject: Re: [PATCH 05/12] net: mana: Set the DMA device max page size
Date: Tue, 17 May 2022 11:59:49 -0300 [thread overview]
Message-ID: <20220517145949.GH63055@ziepe.ca> (raw)
In-Reply-To: <1652778276-2986-6-git-send-email-longli@linuxonhyperv.com>
On Tue, May 17, 2022 at 02:04:29AM -0700, longli@linuxonhyperv.com wrote:
> From: Long Li <longli@microsoft.com>
>
> The system chooses default 64K page size if the device does not specify
> the max page size the device can handle for DMA. This do not work well
> when device is registering large chunk of memory in that a large page size
> is more efficient.
>
> Set it to the maximum hardware supported page size.
For RDMA devices this should be set to the largest segment size an
ib_sge can take in when posting work. It should not be the page size
of MR. 2M is a weird number for that, are you sure it is right?
Jason
next prev parent reply other threads:[~2022-05-17 14:59 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-17 9:04 [PATCH 00/12] Introduce Microsoft Azure Network Adapter (MANA) RDMA driver longli
2022-05-17 9:04 ` [PATCH 01/12] net: mana: Add support for auxiliary device longli
2022-05-19 18:58 ` kernel test robot
2022-05-17 9:04 ` [PATCH 02/12] net: mana: Record the physical address for doorbell page region longli
2022-05-17 9:04 ` [PATCH 03/12] net: mana: Handle vport sharing between devices longli
2022-05-17 15:19 ` Stephen Hemminger
2022-05-17 23:39 ` Long Li
2022-05-17 9:04 ` [PATCH 04/12] net: mana: Add functions for allocating doorbell page from GDMA longli
2022-05-17 9:04 ` [PATCH 05/12] net: mana: Set the DMA device max page size longli
2022-05-17 14:59 ` Jason Gunthorpe [this message]
2022-05-17 19:32 ` Long Li
2022-05-17 19:35 ` Jason Gunthorpe
2022-05-17 20:04 ` Long Li
2022-05-18 0:03 ` Jason Gunthorpe
2022-05-18 5:59 ` [EXTERNAL] " Ajay Sharma
2022-05-18 16:05 ` Jason Gunthorpe
2022-05-18 21:05 ` Ajay Sharma
2022-05-18 23:11 ` Jason Gunthorpe
2022-05-19 0:37 ` Long Li
2022-05-17 9:04 ` [PATCH 06/12] net: mana: Define data structures for protection domain and memory registration longli
2022-05-17 9:04 ` [PATCH 07/12] net: mana: Export Work Queue functions for use by RDMA driver longli
2022-05-17 9:04 ` [PATCH 08/12] net: mana: Record port number in netdev longli
2022-05-17 9:04 ` [PATCH 09/12] net: mana: Move header files to a common location longli
2022-05-17 15:03 ` Jason Gunthorpe
2022-05-17 19:34 ` Long Li
2022-05-17 9:04 ` [PATCH 10/12] net: mana: Define max values for SGL entries longli
2022-05-17 9:04 ` [PATCH 11/12] net: mana: Define and process GDMA response code GDMA_STATUS_MORE_ENTRIES longli
2022-05-17 9:04 ` [PATCH 12/12] RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter longli
2022-05-17 15:24 ` Jason Gunthorpe
2022-05-19 5:57 ` Long Li
2022-05-19 12:49 ` Jason Gunthorpe
2022-05-19 17:50 ` Long Li
2022-05-17 23:40 ` kernel test robot
2022-05-18 1:14 ` kernel test robot
2022-05-19 21:42 ` kernel test robot
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