From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Sagi Grimberg <sagig-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
Cc: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
"linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Steve Wise
<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Oren Duer <oren-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
Chuck Lever <chuck.lever-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
Bart Van Assche <bvanassche-HInyCGIudOg@public.gmane.org>,
Liran Liss <liranl-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>,
"Hefty,
Sean" <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Tom Talpey <tom-CLs1Zie5N5HQT0dZR+AlfA@public.gmane.org>
Subject: Re: Kernel fast memory registration API proposal [RFC]
Date: Mon, 20 Jul 2015 10:23:40 -0600 [thread overview]
Message-ID: <20150720162340.GB18336@obsidianresearch.com> (raw)
In-Reply-To: <55AB36A4.1070102-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
On Sun, Jul 19, 2015 at 08:33:24AM +0300, Sagi Grimberg wrote:
> I was thinking that the user won't explicitly say which key it registers
> and it will be decided from the registration itself.
> Meaning, the registration code will do:
Please don't..
> if (access | (IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_WRITE)
> register rkey...
> else
> register lkey...
>
> Will that work with iWARP? or will this break because
> iWARP needs REMOTE_WRITE for lkeys?
Right, it will break.
Access flags are only weakly related to lkey/rkey.
It needs to be explicit. We have spots in the API that take lkeys and
other spots the take rkeys - the caller must always know the intended
use of the key it is requesting, there is no reason not to describe
that explicitly.
Jason
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next prev parent reply other threads:[~2015-07-20 16:23 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-10 9:09 Kernel fast memory registration API proposal [RFC] Sagi Grimberg
[not found] ` <559F8BD1.9080308-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-11 10:39 ` Christoph Hellwig
[not found] ` <20150711103920.GE14741-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2015-07-12 7:57 ` Sagi Grimberg
[not found] ` <55A21DF6.6090909-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-12 18:15 ` Chuck Lever
[not found] ` <96901C8F-D916-4ECF-8DA4-C5C67FB8539E-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-13 6:47 ` Christoph Hellwig
[not found] ` <20150713064701.GB31842-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2015-07-13 14:16 ` Chuck Lever
[not found] ` <1D9C0527-E277-4C3F-A80D-C4FBAA3D82E9-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-14 8:50 ` Sagi Grimberg
[not found] ` <55A4CD5B.9030000-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-14 18:58 ` Chuck Lever
2015-07-13 16:30 ` Jason Gunthorpe
[not found] ` <20150713163015.GA23832-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-14 8:39 ` Sagi Grimberg
[not found] ` <55A4CABC.5050807-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-14 14:42 ` Steve Wise
2015-07-14 15:33 ` Christoph Hellwig
[not found] ` <20150714153347.GA11026-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2015-07-14 15:53 ` Jason Gunthorpe
[not found] ` <20150714155340.GA7399-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-14 16:46 ` Sagi Grimberg
[not found] ` <55A53CFA.7070509-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-14 17:08 ` Jason Gunthorpe
[not found] ` <20150714170808.GA19814-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-14 18:07 ` Steve Wise
2015-07-15 3:05 ` Doug Ledford
[not found] ` <55A5CDE2.4060904-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-07-15 8:52 ` Sagi Grimberg
2015-07-14 16:12 ` Sagi Grimberg
[not found] ` <55A534D1.6030008-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-14 16:16 ` Steve Wise
2015-07-14 17:29 ` Tom Talpey
2015-07-14 16:35 ` Jason Gunthorpe
[not found] ` <20150714163506.GC7399-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-14 16:55 ` Sagi Grimberg
[not found] ` <55A53F0B.5050009-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-14 17:09 ` Jason Gunthorpe
[not found] ` <20150714170859.GB19814-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-15 8:01 ` Sagi Grimberg
[not found] ` <55A6136A.8010204-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-15 14:32 ` Chuck Lever
[not found] ` <A9EF2F26-E737-4E80-B2E3-F8D6406F9893-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-15 14:39 ` Chuck Lever
2015-07-15 17:19 ` Jason Gunthorpe
[not found] ` <20150715171926.GB23588-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-15 18:39 ` Steve Wise
2015-07-15 21:25 ` Chuck Lever
[not found] ` <F2C64EE9-38A5-4DEE-B60E-AD8430FE1049-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-15 22:49 ` Jason Gunthorpe
[not found] ` <20150715224928.GA941-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-16 14:45 ` Chuck Lever
[not found] ` <F0518DEF-D43C-4CB6-89ED-CA3E94A4DD72-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-16 14:56 ` Steve Wise
2015-07-16 17:40 ` Jason Gunthorpe
[not found] ` <20150716174046.GB3680-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-16 20:07 ` Chuck Lever
[not found] ` <F8484ABB-BED9-463F-8AEA-EB898EBDD93C-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-16 20:49 ` Jason Gunthorpe
[not found] ` <20150716204932.GA10638-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-17 15:03 ` Chuck Lever
[not found] ` <62F9F5B8-0A18-4DF8-B47E-7408BFFE9904-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-17 17:21 ` Jason Gunthorpe
[not found] ` <20150717172141.GA15808-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-17 19:26 ` Chuck Lever
[not found] ` <9A70883F-9963-42D0-9F5C-EF49F822A037-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2015-07-17 20:36 ` Jason Gunthorpe
2015-07-16 6:52 ` Sagi Grimberg
[not found] ` <55A754BC.6010706-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-16 8:07 ` Christoph Hellwig
[not found] ` <20150716080702.GD9093-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2015-07-16 8:29 ` Sagi Grimberg
[not found] ` <55A76B84.30504-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-16 14:25 ` Steve Wise
2015-07-16 14:40 ` Sagi Grimberg
2015-07-15 18:31 ` Jason Gunthorpe
[not found] ` <20150715183129.GC23588-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-15 18:50 ` Steve Wise
2015-07-15 19:09 ` Jason Gunthorpe
[not found] ` <20150715190947.GE23588-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-15 19:26 ` Steve Wise
2015-07-16 8:02 ` Christoph Hellwig
2015-07-15 7:32 ` Christoph Hellwig
[not found] ` <20150715073233.GA11535-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2015-07-15 8:33 ` Sagi Grimberg
[not found] ` <55A61AE3.8020609-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-15 9:07 ` Christoph Hellwig
2015-07-15 19:15 ` Jason Gunthorpe
2015-07-15 17:07 ` Jason Gunthorpe
[not found] ` <20150715170750.GA23588-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-16 12:21 ` Sagi Grimberg
[not found] ` <55A7A1B0.5000808-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-16 18:08 ` Jason Gunthorpe
[not found] ` <20150716180806.GC3680-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-19 5:33 ` Sagi Grimberg
[not found] ` <55AB36A4.1070102-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-20 16:23 ` Jason Gunthorpe [this message]
[not found] ` <20150720162340.GB18336-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-20 16:29 ` Sagi Grimberg
2015-07-19 5:45 ` Sagi Grimberg
[not found] ` <55AB3976.7060202-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-20 16:18 ` Jason Gunthorpe
[not found] ` <20150720161821.GA18336-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-20 16:27 ` Sagi Grimberg
[not found] ` <55AD2188.50708-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-20 17:00 ` Jason Gunthorpe
[not found] ` <20150720170033.GA20350-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-20 17:07 ` Sagi Grimberg
[not found] ` <55AD2AB4.8010209-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-20 19:50 ` Jason Gunthorpe
[not found] ` <20150720195027.GA24162-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2015-07-21 11:40 ` Sagi Grimberg
[not found] ` <55AE2FA2.3000601-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2015-07-21 16:00 ` Jason Gunthorpe
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