From: Sagi Grimberg <sagig-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
To: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v1 06/12] xprtrdma: Always provide a write list when sending NFS READ
Date: Sun, 12 Jul 2015 17:42:11 +0300 [thread overview]
Message-ID: <55A27CC3.9080601@dev.mellanox.co.il> (raw)
In-Reply-To: <20150709204237.26247.297.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
On 7/9/2015 11:42 PM, Chuck Lever wrote:
> The client has been setting up a reply chunk for NFS READs that are
> smaller than the inline threshold. This is not efficient: both the
> server and client CPUs have to copy the reply's data payload into
> and out of the memory region that is then transferred via RDMA.
>
> Using the write list, the data payload is moved by the device and no
> extra data copying is necessary.
>
> Signed-off-by: Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Reviewed-By: Sagi Grimberg <sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
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next prev parent reply other threads:[~2015-07-12 14:42 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-09 20:41 [PATCH v1 00/12] NFS/RDMA client side for Linux 4.3 Chuck Lever
[not found] ` <20150709203242.26247.4848.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-09 20:41 ` [PATCH v1 01/12] xprtrdma: Make xprt_setup_rdma() agnostic to family of server address Chuck Lever
2015-07-09 20:41 ` [PATCH v1 02/12] xprtrdma: Raise maximum payload size to one megabyte Chuck Lever
[not found] ` <20150709204159.26247.44592.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-10 10:25 ` Devesh Sharma
2015-07-10 19:21 ` Anna Schumaker
[not found] ` <55A01B56.2020107-ZwjVKphTwtPQT0dZR+AlfA@public.gmane.org>
2015-07-10 19:33 ` Chuck Lever
[not found] ` <F9717330-F362-477B-915D-D6AAE7B5DDDB-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-10 19:41 ` Anna Schumaker
2015-07-12 14:31 ` Sagi Grimberg
2015-07-09 20:42 ` [PATCH v1 03/12] xprtrdma: Increase default credit limit Chuck Lever
[not found] ` <20150709204208.26247.52073.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-10 10:45 ` Devesh Sharma
[not found] ` <CANjDDBiMDM5VP5ev3LFfapX-5amqukH=dJdaEZVcZc9SSP2CCg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-07-10 14:33 ` Chuck Lever
[not found] ` <B6E6A65D-DE61-4A95-91D7-1E8A5132F7EE-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-10 14:47 ` Devesh Sharma
2015-07-12 14:31 ` Sagi Grimberg
2015-07-09 20:42 ` [PATCH v1 04/12] xprtrdma: Remove last ib_reg_phys_mr() call site Chuck Lever
[not found] ` <20150709204218.26247.67243.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-10 10:52 ` Devesh Sharma
2015-07-11 10:34 ` Christoph Hellwig
[not found] ` <20150711103428.GD14741-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2015-07-11 18:50 ` Chuck Lever
[not found] ` <682604AF-955A-44F8-86F9-EB7D403CABFF-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-07-12 7:58 ` Christoph Hellwig
2015-07-12 14:31 ` Sagi Grimberg
2015-07-09 20:42 ` [PATCH v1 05/12] xprtrdma: Account for RPC/RDMA header size when deciding to inline Chuck Lever
[not found] ` <20150709204227.26247.51111.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-10 10:55 ` Devesh Sharma
2015-07-10 20:08 ` Anna Schumaker
[not found] ` <55A02650.1050809-ZwjVKphTwtPQT0dZR+AlfA@public.gmane.org>
2015-07-10 20:28 ` Chuck Lever
2015-07-12 14:37 ` Sagi Grimberg
[not found] ` <55A27B9D.5010002-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-12 17:52 ` Chuck Lever
2015-07-09 20:42 ` [PATCH v1 06/12] xprtrdma: Always provide a write list when sending NFS READ Chuck Lever
[not found] ` <20150709204237.26247.297.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-10 11:08 ` Devesh Sharma
2015-07-12 14:42 ` Sagi Grimberg [this message]
2015-07-09 20:42 ` [PATCH v1 07/12] xprtrdma: Don't provide a reply chunk when expecting a short reply Chuck Lever
[not found] ` <20150709204246.26247.10367.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-12 14:58 ` Sagi Grimberg
[not found] ` <55A2809C.7020106-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-12 18:38 ` Chuck Lever
[not found] ` <2EB8EA33-9345-4D18-8BE1-39C4EB2658E2-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-14 9:54 ` Sagi Grimberg
2015-07-09 20:42 ` [PATCH v1 08/12] xprtrdma: Fix XDR tail buffer marshalling Chuck Lever
2015-07-09 20:43 ` [PATCH v1 09/12] xprtrdma: Prepare rpcrdma_ep_post() for RDMA_NOMSG calls Chuck Lever
[not found] ` <20150709204305.26247.39173.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-10 11:29 ` Devesh Sharma
[not found] ` <CANjDDBh38PrxGgWGuKYCYcbjqY9ELrpkGqaRZ_ueKfD7FEQP8g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-07-10 12:58 ` Tom Talpey
[not found] ` <559FC17A.7060502-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2015-07-10 14:11 ` Devesh Sharma
[not found] ` <CANjDDBipaXMO7Z5wirG127E9kQ0aHdWJ1s6ZM21th5RWLNh-4Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-07-10 14:53 ` Chuck Lever
[not found] ` <F5F5CAC4-866E-4BCA-8094-908CE9ED3B4B-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-10 22:44 ` Jason Gunthorpe
2015-07-10 20:43 ` Anna Schumaker
[not found] ` <55A02E73.7000902-ZwjVKphTwtPQT0dZR+AlfA@public.gmane.org>
2015-07-10 20:52 ` Chuck Lever
2015-07-09 20:43 ` [PATCH v1 10/12] xprtrdma: Fix large NFS SYMLINK calls Chuck Lever
[not found] ` <20150709204315.26247.47851.stgit-FYjufvaPoItvLzlybtyyYzGyq/o6K9yX@public.gmane.org>
2015-07-14 16:01 ` Anna Schumaker
[not found] ` <55A53259.8090606-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-07-14 19:09 ` Chuck Lever
2015-07-09 20:43 ` [PATCH v1 11/12] xprtrdma: Clean up xprt_rdma_print_stats() Chuck Lever
2015-07-09 20:43 ` [PATCH v1 12/12] xprtrdma: Count RDMA_NOMSG type calls Chuck Lever
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