From: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
To: "Hefty, Sean" <sean.hefty@intel.com>,
"Marciniszyn, Mike" <mike.marciniszyn@intel.com>
Cc: Steve Wise <swise@opengridcomputing.com>,
"'Christoph Hellwig'" <hch@infradead.org>,
"'Sagi Grimberg'" <sagig@dev.mellanox.co.il>,
"'Steve Wise'" <swise@ogc.us>, "'Tom Talpey'" <tom@talpey.com>,
"'Doug Ledford'" <dledford@redhat.com>,
"sagig@mellanox.com" <sagig@mellanox.com>,
"ogerlitz@mellanox.com" <ogerlitz@mellanox.com>,
"roid@mellanox.com" <roid@mellanox.com>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"eli@mellanox.com" <eli@mellanox.com>,
"target-devel@vger.kernel.org" <target-devel@vger.kernel.org>,
"linux-nfs@vger.kernel.org" <linux-nfs@vger.kernel.org>,
"trond.myklebust@primarydata.com"
<trond.myklebust@primarydata.com>,
"bfields@fieldses.org" <bfields@fieldses.org>,
"'Oren Duer'" <oren@mellanox.com>
Subject: Re: [PATCH V3 1/5] RDMA/core: Transport-independent access flags
Date: Thu, 23 Jul 2015 17:53:10 -0600 [thread overview]
Message-ID: <20150723235310.GA20537@obsidianresearch.com> (raw)
In-Reply-To: <1828884A29C6694DAF28B7E6B8A82373A901DB80@ORSMSX109.amr.corp.intel.com>
On Thu, Jul 23, 2015 at 11:30:08PM +0000, Hefty, Sean wrote:
> I don't see where usnic, ipath, qib, or opa technically need an lkey
> at all.
The lkey is possibly useful if someone wants to do single op transfers
larger than the S/G limit of the SQE. I haven't noticed any ULPs doing
that..
qib family may not technically need a lkey, but those drivers are the
only modern drivers not to support IB_DEVICE_LOCAL_DMA_LKEY.
Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: "Hefty,
Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"Marciniszyn,
Mike" <mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Steve Wise
<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
'Christoph Hellwig' <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
'Sagi Grimberg'
<sagig-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>,
'Steve Wise' <swise-/Yg/VP3ZvrM@public.gmane.org>,
'Tom Talpey' <tom-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>,
'Doug Ledford' <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org"
<sagig-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
"ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org"
<ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
"roid-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org"
<roid-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"eli-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org"
<eli-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
"target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<target-devel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-nfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"trond.myklebust-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org"
<trond.myklebust-7I+n7zu2hftEKMMhf/gKZA@public.gmane.org>,
"bfields-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org"
<bfields-uC3wQj2KruNg9hUCZPvPmw@public.gmane.org>,
'Oren Duer' <oren-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Subject: Re: [PATCH V3 1/5] RDMA/core: Transport-independent access flags
Date: Thu, 23 Jul 2015 17:53:10 -0600 [thread overview]
Message-ID: <20150723235310.GA20537@obsidianresearch.com> (raw)
In-Reply-To: <1828884A29C6694DAF28B7E6B8A82373A901DB80-P5GAC/sN6hkd3b2yrw5b5LfspsVTdybXVpNB7YpNyf8@public.gmane.org>
On Thu, Jul 23, 2015 at 11:30:08PM +0000, Hefty, Sean wrote:
> I don't see where usnic, ipath, qib, or opa technically need an lkey
> at all.
The lkey is possibly useful if someone wants to do single op transfers
larger than the S/G limit of the SQE. I haven't noticed any ULPs doing
that..
qib family may not technically need a lkey, but those drivers are the
only modern drivers not to support IB_DEVICE_LOCAL_DMA_LKEY.
Jason
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next prev parent reply other threads:[~2015-07-23 23:53 UTC|newest]
Thread overview: 223+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-05 23:21 [PATCH V3 0/5] Transport-independent MRs Steve Wise
2015-07-05 23:22 ` [PATCH V3 1/5] RDMA/core: Transport-independent access flags Steve Wise
2015-07-06 5:25 ` Christoph Hellwig
2015-07-06 14:23 ` Steve Wise
2015-07-06 14:23 ` Steve Wise
2015-07-07 8:58 ` 'Christoph Hellwig'
2015-07-06 7:09 ` Haggai Eran
2015-07-06 7:09 ` Haggai Eran
2015-07-06 14:29 ` Steve Wise
2015-07-06 14:29 ` Steve Wise
2015-07-07 14:17 ` Steve Wise
2015-07-07 14:17 ` Steve Wise
2015-07-07 14:34 ` Haggai Eran
2015-07-07 14:34 ` Haggai Eran
2015-07-07 14:46 ` Steve Wise
2015-07-07 14:46 ` Steve Wise
2015-07-07 15:07 ` Haggai Eran
2015-07-07 15:07 ` Haggai Eran
2015-07-06 7:53 ` Sagi Grimberg
2015-07-06 7:53 ` Sagi Grimberg
2015-07-06 14:37 ` Steve Wise
2015-07-06 14:37 ` Steve Wise
2015-07-06 16:17 ` Sagi Grimberg
2015-07-06 16:17 ` Sagi Grimberg
2015-07-06 16:55 ` Steve Wise
2015-07-06 16:55 ` Steve Wise
2015-07-07 9:00 ` Christoph Hellwig
2015-07-07 9:14 ` Sagi Grimberg
2015-07-07 9:14 ` Sagi Grimberg
2015-07-07 14:05 ` Steve Wise
2015-07-07 14:05 ` Steve Wise
2015-07-07 16:17 ` Jason Gunthorpe
2015-07-07 16:17 ` Jason Gunthorpe
2015-07-07 16:27 ` Sagi Grimberg
2015-07-07 16:27 ` Sagi Grimberg
2015-07-07 21:36 ` Jason Gunthorpe
2015-07-07 21:36 ` Jason Gunthorpe
2015-07-08 7:29 ` Sagi Grimberg
2015-07-08 8:13 ` 'Christoph Hellwig'
2015-07-08 8:13 ` 'Christoph Hellwig'
2015-07-08 10:05 ` Sagi Grimberg
2015-07-08 10:05 ` Sagi Grimberg
2015-07-08 10:20 ` 'Christoph Hellwig'
2015-07-08 10:20 ` 'Christoph Hellwig'
2015-07-08 11:08 ` Sagi Grimberg
2015-07-08 11:08 ` Sagi Grimberg
2015-07-08 17:14 ` Hefty, Sean
2015-07-08 17:14 ` Hefty, Sean
2015-07-09 8:46 ` Sagi Grimberg
2015-07-09 13:52 ` Chuck Lever
2015-07-10 19:34 ` Christoph Hellwig
2015-07-12 7:49 ` Sagi Grimberg
2015-07-13 16:50 ` Jason Gunthorpe
2015-07-14 8:06 ` Sagi Grimberg
2015-07-14 12:24 ` Tom Talpey
2015-07-14 12:24 ` Tom Talpey
2015-07-14 13:21 ` Sagi Grimberg
2015-07-14 13:21 ` Sagi Grimberg
2015-07-23 0:43 ` Hefty, Sean
2015-07-23 0:43 ` Hefty, Sean
2015-07-08 19:08 ` Jason Gunthorpe
2015-07-08 20:32 ` 'Christoph Hellwig'
2015-07-08 20:32 ` 'Christoph Hellwig'
2015-07-08 20:37 ` 'Christoph Hellwig'
2015-07-08 20:37 ` 'Christoph Hellwig'
2015-07-09 0:03 ` Jason Gunthorpe
2015-07-09 8:00 ` 'Christoph Hellwig'
2015-07-09 8:00 ` 'Christoph Hellwig'
2015-07-09 8:58 ` Sagi Grimberg
2015-07-09 8:58 ` Sagi Grimberg
2015-07-09 22:18 ` Doug Ledford
2015-07-09 22:18 ` Doug Ledford
2015-07-09 22:53 ` Jason Gunthorpe
2015-07-09 22:53 ` Jason Gunthorpe
2015-07-10 13:22 ` Tom Talpey
2015-07-10 16:11 ` Jason Gunthorpe
2015-07-10 16:11 ` Jason Gunthorpe
2015-07-10 17:56 ` Doug Ledford
2015-07-10 18:34 ` Chuck Lever
2015-07-10 18:42 ` Tom Talpey
2015-07-10 19:54 ` Jason Gunthorpe
2015-07-10 19:54 ` Jason Gunthorpe
2015-07-10 20:48 ` Jason Gunthorpe
2015-07-10 22:33 ` Doug Ledford
2015-07-10 22:33 ` Doug Ledford
2015-07-11 10:17 ` 'Christoph Hellwig'
2015-07-11 10:17 ` 'Christoph Hellwig'
2015-07-13 16:57 ` Jason Gunthorpe
2015-07-13 16:57 ` Jason Gunthorpe
2015-07-14 7:25 ` 'Christoph Hellwig'
2015-07-14 9:05 ` Sagi Grimberg
2015-07-14 15:35 ` 'Christoph Hellwig'
2015-07-14 17:26 ` Jason Gunthorpe
2015-07-15 7:10 ` Sagi Grimberg
2015-07-15 7:10 ` Sagi Grimberg
2015-07-10 22:30 ` Doug Ledford
2015-07-10 22:30 ` Doug Ledford
2015-07-10 20:57 ` Jason Gunthorpe
2015-07-10 22:27 ` Doug Ledford
2015-07-10 22:27 ` Doug Ledford
[not found] ` <20150710233417.GA8919@obsidianresearch.com>
2015-07-11 3:10 ` Doug Ledford
2015-07-11 3:10 ` Doug Ledford
2015-07-13 17:18 ` Jason Gunthorpe
2015-07-13 17:18 ` Jason Gunthorpe
2015-07-13 22:23 ` Tom Talpey
2015-07-11 16:37 ` Steve Wise
2015-07-12 10:46 ` Sagi Grimberg
2015-07-12 10:46 ` Sagi Grimberg
2015-07-14 19:25 ` Steve Wise
2015-07-14 19:25 ` Steve Wise
2015-07-14 19:29 ` Jason Gunthorpe
2015-07-14 19:32 ` Steve Wise
2015-07-14 19:32 ` Steve Wise
2015-07-14 19:37 ` Jason Gunthorpe
2015-07-14 19:55 ` 'Christoph Hellwig'
2015-07-14 19:55 ` 'Christoph Hellwig'
2015-07-14 20:10 ` Steve Wise
2015-07-14 20:10 ` Steve Wise
2015-07-14 20:29 ` Jason Gunthorpe
2015-07-14 20:29 ` Jason Gunthorpe
2015-07-14 20:40 ` Steve Wise
2015-07-14 20:40 ` Steve Wise
2015-07-14 20:44 ` Jason Gunthorpe
2015-07-14 20:44 ` Jason Gunthorpe
2015-07-14 20:54 ` Steve Wise
2015-07-14 20:54 ` Steve Wise
2015-07-14 20:59 ` Jason Gunthorpe
2015-07-14 20:59 ` Jason Gunthorpe
2015-07-14 20:50 ` Tom Talpey
2015-07-14 20:50 ` Tom Talpey
2015-07-15 6:50 ` 'Christoph Hellwig'
2015-07-15 19:12 ` Jason Gunthorpe
2015-07-15 19:12 ` Jason Gunthorpe
2015-07-16 6:41 ` Jason Gunthorpe
2015-07-16 6:41 ` Jason Gunthorpe
2015-07-16 8:04 ` 'Christoph Hellwig'
2015-07-16 8:04 ` 'Christoph Hellwig'
2015-07-16 16:13 ` Jason Gunthorpe
2015-07-16 16:13 ` Jason Gunthorpe
2015-07-15 8:47 ` Sagi Grimberg
2015-07-15 8:47 ` Sagi Grimberg
2015-07-15 12:19 ` 'Christoph Hellwig'
2015-07-15 12:19 ` 'Christoph Hellwig'
2015-07-15 19:17 ` Jason Gunthorpe
2015-07-15 19:17 ` Jason Gunthorpe
2015-07-14 20:46 ` Tom Talpey
2015-07-14 19:45 ` 'Christoph Hellwig'
2015-07-14 19:57 ` Jason Gunthorpe
2015-07-14 19:57 ` Jason Gunthorpe
2015-07-14 19:58 ` Steve Wise
2015-07-14 19:58 ` Steve Wise
2015-07-14 20:41 ` Jason Gunthorpe
2015-07-14 20:41 ` Jason Gunthorpe
2015-07-14 20:51 ` Steve Wise
2015-07-14 20:51 ` Steve Wise
2015-07-14 21:01 ` Steve Wise
2015-07-14 21:01 ` Steve Wise
2015-07-14 21:14 ` Jason Gunthorpe
2015-07-14 21:14 ` Jason Gunthorpe
2015-07-23 18:53 ` Hefty, Sean
2015-07-23 18:53 ` Hefty, Sean
2015-07-23 19:03 ` Steve Wise
2015-07-23 19:03 ` Steve Wise
2015-07-23 23:30 ` Hefty, Sean
2015-07-23 23:30 ` Hefty, Sean
2015-07-23 23:53 ` Jason Gunthorpe [this message]
2015-07-23 23:53 ` Jason Gunthorpe
2015-07-24 0:18 ` Hefty, Sean
2015-07-24 0:18 ` Hefty, Sean
2015-07-24 4:46 ` Jason Gunthorpe
2015-07-09 8:47 ` Sagi Grimberg
2015-07-09 8:47 ` Sagi Grimberg
2015-07-08 21:38 ` Tom Talpey
2015-07-08 23:36 ` Jason Gunthorpe
2015-07-09 11:02 ` Sagi Grimberg
2015-07-09 17:01 ` Jason Gunthorpe
2015-07-09 17:01 ` Jason Gunthorpe
2015-07-09 20:00 ` Tom Talpey
2015-07-09 21:16 ` Jason Gunthorpe
[not found] ` <20150709170142.GA21921-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-10 8:55 ` kernel memory registration (was: RDMA/core: Transport-independent access flags) Sagi Grimberg
[not found] ` <559F8881.7070308-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-10 16:35 ` Jason Gunthorpe
2015-07-11 10:31 ` 'Christoph Hellwig'
[not found] ` <20150711103153.GC14741-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2015-07-13 16:46 ` Jason Gunthorpe
[not found] ` <20150713164652.GC23832-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-14 8:24 ` kernel memory registration Sagi Grimberg
[not found] ` <55A4C73A.7080001-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-14 17:24 ` Jason Gunthorpe
2015-07-11 10:25 ` [PATCH V3 1/5] RDMA/core: Transport-independent access flags 'Christoph Hellwig'
2015-07-13 16:35 ` Jason Gunthorpe
2015-07-13 19:36 ` Tom Talpey
2015-07-13 20:15 ` Jason Gunthorpe
2015-07-14 9:10 ` Sagi Grimberg
2015-07-14 9:10 ` Sagi Grimberg
2015-07-14 15:36 ` 'Christoph Hellwig'
2015-07-14 15:36 ` 'Christoph Hellwig'
2015-07-14 15:47 ` Tom Talpey
2015-07-14 15:47 ` Tom Talpey
2015-07-14 16:22 ` Jason Gunthorpe
2015-07-14 16:22 ` Jason Gunthorpe
2015-07-14 7:37 ` 'Christoph Hellwig'
2015-07-14 9:22 ` Sagi Grimberg
2015-07-14 12:12 ` Tom Talpey
2015-07-14 12:12 ` Tom Talpey
2015-07-14 13:23 ` Sagi Grimberg
2015-07-14 14:45 ` Steve Wise
2015-07-14 14:45 ` Steve Wise
2015-07-14 15:40 ` 'Christoph Hellwig'
2015-07-14 15:40 ` 'Christoph Hellwig'
2015-07-08 8:11 ` 'Christoph Hellwig'
2015-07-06 7:58 ` Sagi Grimberg
2015-07-06 7:58 ` Sagi Grimberg
2015-07-06 14:39 ` Steve Wise
2015-07-06 14:39 ` Steve Wise
2015-07-05 23:22 ` [PATCH V3 2/5] RDMA/iser: Use transport independent MR allocation Steve Wise
2015-07-05 23:22 ` [PATCH V3 3/5] RDMA/isert: " Steve Wise
2015-07-05 23:22 ` Steve Wise
2015-07-05 23:22 ` [PATCH V3 4/5] svcrdma: " Steve Wise
2015-07-05 23:22 ` Steve Wise
2015-07-05 23:22 ` [PATCH V3 5/5] xprtrdma: " Steve Wise
2015-07-05 23:22 ` Steve Wise
2015-07-06 5:25 ` [PATCH V3 0/5] Transport-independent MRs Christoph Hellwig
2015-07-06 5:25 ` Christoph Hellwig
2015-07-06 14:24 ` Steve Wise
2015-07-06 14:24 ` Steve Wise
2015-07-07 9:01 ` 'Christoph Hellwig'
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