From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Parav Pandit <parav-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Cc: Bart Van Assche
<Bart.VanAssche-XdAiOPVOjttBDgjK7y7TUQ@public.gmane.org>,
"leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org"
<dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Idan Burstein <idanb-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH rdma-next 0/3] Support out of order data placement
Date: Mon, 12 Jun 2017 10:29:17 -0600 [thread overview]
Message-ID: <20170612162917.GA11993@obsidianresearch.com> (raw)
In-Reply-To: <VI1PR0502MB3008478FC7C70D1F398FE2B2D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
On Mon, Jun 12, 2017 at 04:19:37PM +0000, Parav Pandit wrote:
> So, - to your question - shouldn't that be a flag to disable
> out-of-order writes? By default, its disabled at RDMA level.
Bart's point is that it is not disabled, by default, it is platform
specific by default.
Your patch makes makes it more likely a ULP will see out of order
writes, but it is already the case that any ULP that relies on this is
platform specific and/or broken.
I think the answer to Bart's question is that some MPI ULPs are
'broken' and only work on x86 - setting this bit by default would
cause them to stop working. It is unfortunate this is the rare case.
I would suggest at least using the inverted sense like Bart describes
in the kernel - every kernel ULP is safe.
Jason
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next prev parent reply other threads:[~2017-06-12 16:29 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-12 6:49 [PATCH rdma-next 0/3] Support out of order data placement Leon Romanovsky
[not found] ` <20170612064918.12510-1-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-06-12 6:49 ` [PATCH rdma-next 1/3] IB/core: Expose out of order data placement capability Leon Romanovsky
2017-06-12 6:49 ` [PATCH rdma-next 2/3] IB/uverbs: Enable user space programs to use out of order placement Leon Romanovsky
2017-06-12 6:49 ` [PATCH rdma-next 3/3] IB/mlx5: Support out of order data placement Leon Romanovsky
2017-06-12 15:28 ` [PATCH rdma-next 0/3] " Bart Van Assche
[not found] ` <1497281280.2770.1.camel-Sjgp3cTcYWE@public.gmane.org>
2017-06-12 16:19 ` Parav Pandit
[not found] ` <VI1PR0502MB3008478FC7C70D1F398FE2B2D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 16:29 ` Bart Van Assche
[not found] ` <1497284956.2770.8.camel-Sjgp3cTcYWE@public.gmane.org>
2017-06-12 16:51 ` Parav Pandit
2017-06-12 16:29 ` Jason Gunthorpe [this message]
[not found] ` <20170612162917.GA11993-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 16:42 ` Parav Pandit
[not found] ` <VI1PR0502MB3008EA451DA9ECEBECE27362D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 16:43 ` Jason Gunthorpe
[not found] ` <20170612164343.GA12435-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 16:53 ` Parav Pandit
[not found] ` <VI1PR0502MB300831A1560531E67B29589DD1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 16:55 ` Jason Gunthorpe
[not found] ` <20170612165536.GB12435-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 17:11 ` Parav Pandit
[not found] ` <VI1PR0502MB30089EDC828A142338B1EE06D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 17:14 ` Jason Gunthorpe
[not found] ` <20170612171436.GA12739-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 17:28 ` Parav Pandit
[not found] ` <VI1PR0502MB3008304F8465C19ACCFF3D68D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 17:32 ` Jason Gunthorpe
[not found] ` <20170612173221.GA13302-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 17:46 ` Parav Pandit
[not found] ` <VI1PR0502MB30081FD74492E97043F45BD8D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 17:51 ` Jason Gunthorpe
2017-06-12 21:09 ` Tom Talpey
[not found] ` <6747e257-67b0-a364-be21-04f73ef82ffe-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-06-12 21:32 ` Parav Pandit
[not found] ` <VI1PR0502MB30080B672B80836FF0A328DCD1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 21:41 ` Jason Gunthorpe
[not found] ` <20170612214135.GB30578-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 21:59 ` Parav Pandit
[not found] ` <VI1PR0502MB30087762738A4E02A1DA24D0D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 22:07 ` Jason Gunthorpe
[not found] ` <20170612220730.GA32510-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 22:16 ` Parav Pandit
[not found] ` <VI1PR0502MB30088258D7BADC83B0609F38D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 22:21 ` Jason Gunthorpe
2017-06-12 22:19 ` Tom Talpey
[not found] ` <475e1873-e842-ecb9-d260-34777da57e51-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-06-12 22:54 ` Parav Pandit
[not found] ` <VI1PR0502MB3008B7FE60CAB3BD49907A1BD1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 23:44 ` Tom Talpey
[not found] ` <d3a436a0-9ace-b11a-2e4c-387fc575877e-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-06-12 23:59 ` Parav Pandit
[not found] ` <VI1PR0502MB3008E04612EED6BC83F37115D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-13 0:11 ` Tom Talpey
[not found] ` <fbdcf05b-ccd8-bd9c-c9c8-86f373303250-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-06-13 0:36 ` Parav Pandit
[not found] ` <VI1PR0502MB30089271EB542493AA58060CD1C20-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-13 1:30 ` Tom Talpey
[not found] ` <fb11f261-b80b-f71a-8076-204706267798-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-06-13 19:17 ` Jason Gunthorpe
2017-06-23 16:03 ` Parav Pandit
2017-07-19 5:33 ` Parav Pandit
[not found] ` <VI1PR0502MB3008D488FEE8A7104A7B0A7CD1A60-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-07-19 17:12 ` Jason Gunthorpe
[not found] ` <20170719171211.GB25714-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-07-20 15:06 ` Parav Pandit
2017-07-22 2:29 ` Tom Talpey
[not found] ` <142c2fed-baa5-1295-1458-be765c94b957-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-07-22 4:50 ` Parav Pandit
[not found] ` <VI1PR0502MB300886ED1B5B1363B55F53F0D1A50-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-07-22 5:03 ` Tom Talpey
[not found] ` <e5cee768-586c-516a-6056-ea4a44f89134-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-07-22 5:32 ` Parav Pandit
[not found] ` <VI1PR0502MB30089915EB792CD20CA9D179D1A50-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-07-22 14:51 ` Tom Talpey
[not found] ` <4444a96a-c1e6-ad33-204a-680982e19bfe-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
2017-07-22 15:11 ` Parav Pandit
2017-07-22 16:09 ` Jason Gunthorpe
[not found] ` <20170722160939.GA30007-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-07-22 17:32 ` Parav Pandit
[not found] ` <VI1PR0502MB3008E483BB36F944C2E212ACD1A50-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-07-22 21:27 ` Jason Gunthorpe
[not found] ` <20170722212706.GA14714-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-08-01 18:14 ` Parav Pandit
[not found] ` <VI1PR0502MB300871C35E1CC06EB378D6C8D1B30-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-08-01 19:00 ` Jason Gunthorpe
[not found] ` <20170801190052.GA31205-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-08-01 22:06 ` Parav Pandit
[not found] ` <VI1PR0502MB3008D65E9568764C4A781230D1B30-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-08-01 23:37 ` Jason Gunthorpe
[not found] ` <20170801233754.GB10239-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-08-02 0:30 ` Parav Pandit
[not found] ` <VI1PR0502MB300860BDA4E6BD0B10F5DB1ED1B00-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-08-02 2:48 ` Jason Gunthorpe
2017-06-27 9:47 ` Sagi Grimberg
2017-06-12 17:18 ` Steve Wise
2017-06-12 17:37 ` Parav Pandit
[not found] ` <VI1PR0502MB3008CE85A4F274886B74DF2BD1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 19:06 ` Dennis Dalessandro
[not found] ` <3fa7a4b5-5c19-8c6a-d78b-93219a9be888-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-06-12 19:19 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373AB142A9B-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2017-06-12 20:14 ` Parav Pandit
[not found] ` <VI1PR0502MB300885A1DD676E1649CDB268D1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 20:35 ` Dennis Dalessandro
[not found] ` <b5279c09-027f-e374-ffde-7f236c52322c-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-06-12 20:46 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373AB142BEC-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2017-06-12 20:57 ` Steve Wise
2017-06-12 21:02 ` Jason Gunthorpe
[not found] ` <20170612210259.GA25652-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 21:18 ` Steve Wise
2017-06-12 21:22 ` Jason Gunthorpe
2017-06-12 21:53 ` Parav Pandit
[not found] ` <VI1PR0502MB30082486BC3B1669FE48764ED1CD0-o1MPJYiShExKsLr+rGaxW8DSnupUy6xnnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2017-06-12 21:57 ` Jason Gunthorpe
[not found] ` <20170612215741.GA31693-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-06-12 22:00 ` Parav Pandit
2017-06-13 5:29 ` Leon Romanovsky
2017-06-12 20:41 ` Hefty, Sean
[not found] ` <1828884A29C6694DAF28B7E6B8A82373AB142BC8-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2017-06-12 21:25 ` Parav Pandit
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