From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: Or Gerlitz <or.gerlitz-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Tatyana Nikolova
<Tatyana.E.Nikolova-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Steve Wise
<swise-7bPotxP6k4+P2YhJcF5u+vpXobYPEAuW@public.gmane.org>,
Roland Dreier <roland-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
"Lacombe,
John S" <john.s.lacombe-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 0/3] RDMA/core: iWARP Port Mapper Overview
Date: Mon, 9 Jun 2014 10:51:05 -0600 [thread overview]
Message-ID: <20140609165105.GB1816@obsidianresearch.com> (raw)
In-Reply-To: <CAJZOPZ+E0sX6-_tT2DrbLvRvrHWvEcO5KtMGwZqhuoQeTqrrMg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Sun, Jun 08, 2014 at 10:34:30PM +0300, Or Gerlitz wrote:
> What it does is the following:
>
> 1. kernel rdma driver tells a user space daemon they want to reserve
> (claim) the combination of IP address X and TCP port Y for the sake of
> RDMA connections
>
> 2. user space daemon opens a socket and binds to X:Y
>
> Specifically, down the road, more use cases, not only the current
> iWARP case may pop up.
This really seems horrible, using user space to circumvent the kernel
stack because kernel maintainers don't want this kind of integration
is not going to make people very happy.
IIRC the patch set that tried to do this directly in the kernel was
NAK'd, adding a userspace round trip doesn't really change anything.
The message from netdev has, IMHO, always been pretty clear - offload
can live in it's own little side world but cannot appear to the user
to be integrated to the main stack (because it isn't).
Jason
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next prev parent reply other threads:[~2014-06-09 16:51 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-26 22:07 [PATCH 0/3] RDMA/core: iWARP Port Mapper Overview Tatyana Nikolova
2014-05-02 15:35 ` Steve Wise
2014-05-20 1:10 ` Roland Dreier
[not found] ` <CAL1RGDWNr53rXY_o2X7R76aVHtAH_EnK6DZk19N5fGoW1pOAdQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-05-20 13:45 ` Steve Wise
2014-05-20 17:46 ` Nikolova, Tatyana E
2014-06-03 20:20 ` Or Gerlitz
2014-05-20 7:47 ` Or Gerlitz
[not found] ` <001a01cf7431$f6d41f30$e47c5d90$@opengridcomputing.com>
2014-05-20 13:59 ` Or Gerlitz
2014-06-08 19:34 ` Or Gerlitz
[not found] ` <CAJZOPZ+E0sX6-_tT2DrbLvRvrHWvEcO5KtMGwZqhuoQeTqrrMg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-06-09 14:46 ` Steve Wise
2014-06-09 16:51 ` Jason Gunthorpe [this message]
[not found] ` <20140609165105.GB1816-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2014-06-09 18:10 ` Christoph Lameter
[not found] ` <alpine.DEB.2.10.1406091307230.9663-gkYfJU5Cukgdnm+yROfE0A@public.gmane.org>
2014-06-09 18:13 ` Steve Wise
2014-06-09 18:28 ` Christoph Lameter
[not found] ` <alpine.DEB.2.10.1406091326430.9663-gkYfJU5Cukgdnm+yROfE0A@public.gmane.org>
2014-06-09 18:32 ` Steve Wise
2014-06-09 18:12 ` Steve Wise
2014-06-09 18:42 ` Jason Gunthorpe
[not found] ` <2ABFA3E36CBB794685BFBA191CC1964952C605CB@FMSMSX105.amr.corp.intel.com>
[not found] ` <2ABFA3E36CBB794685BFBA191CC1964952C605CB-AtyAts71sc9qS6EAlXoojrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-06-10 0:08 ` FW: " PJ Waskiewicz
[not found] ` <CAEmgqz2HtEJ1ho0rS4xR7ud6YgFfeAvR8uD8MgPjVhw=E9PFEg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-06-10 6:10 ` Or Gerlitz
[not found] ` <5396A145.90504-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2014-06-10 7:03 ` PJ Waskiewicz
2014-06-10 16:52 ` Jason Gunthorpe
[not found] ` <20140610165246.GA12951-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2014-06-10 19:30 ` PJ Waskiewicz
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