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From: Doug Ledford <dledford@redhat.com>
To: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: "ira.weiny" <ira.weiny@intel.com>,
	Leon Romanovsky <leon@kernel.org>,
	Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Vishwanathapura,
	Niranjana" <niranjana.vishwanathapura@intel.com>,
	linux-rdma@vger.kernel.org, netdev@vger.kernel.org,
	dennis.dalessandro@intel.com
Subject: Re: [RFC v2 00/10] HFI Virtual Network Interface Controller (VNIC)
Date: Thu, 15 Dec 2016 13:19:18 -0500	[thread overview]
Message-ID: <4e22bf29-2260-0768-ab17-9a8df6306f37@redhat.com> (raw)
In-Reply-To: <20161215170713.GD3264@obsidianresearch.com>


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On 12/15/2016 12:07 PM, Jason Gunthorpe wrote:
> On Thu, Dec 15, 2016 at 11:28:06AM -0500, Doug Ledford wrote:
> 
>> 1) Since your intent is to make this work with multiple versions of the
>> hfi drivers, I disagree with Jason that just because there is only one
>> driver today that we should keep it simple.  Design it right from the
>> beginning of multi driver is your intent is, IMO, a better way to go.
>> You'll work out the bugs in the initial implementation and when it comes
>> time to add the second driver, things will go much more smoothly.
> 
> If that is your position then this should be a straight up IB ULP that
> works with any IB hardware.

Yes, see my comments in point #3 of my previous email...

> There is nothing HFI specific about it except for the
> micro-optimization of pushing packets via SDMA instead of post_send,
> and that same micro optimization probably applies to ipoib.
> 
> In other words, lets see the first version as a straight ULP with no
> special HFI hooks, then we can discuss how best to micro optimize it
> for HFI SDMA.
> 
> Jason
> 


-- 
Doug Ledford <dledford@redhat.com>
    GPG Key ID: 0E572FDD


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  reply	other threads:[~2016-12-15 18:19 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-15  7:59 [RFC v2 00/10] HFI Virtual Network Interface Controller (VNIC) Vishwanathapura, Niranjana
2016-12-15  7:59 ` [RFC v2 01/10] IB/hfi-vnic: Virtual Network Interface Controller (VNIC) documentation Vishwanathapura, Niranjana
     [not found] ` <1481788782-89964-1-git-send-email-niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-12-15  7:59   ` [RFC v2 02/10] IB/hfi-vnic: Virtual Network Interface Controller (VNIC) interface Vishwanathapura, Niranjana
     [not found]     ` <1481788782-89964-3-git-send-email-niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-12-15  8:53       ` Vishwanathapura, Niranjana
     [not found]         ` <20161215085349.GA90068-wPcXA7LoDC+1XWohqUldA0EOCMrvLtNR@public.gmane.org>
2016-12-15  8:56           ` Christoph Hellwig
2016-12-15 17:36         ` Stephen Hemminger
2016-12-15  7:59   ` [RFC v2 03/10] IB/hfi-vnic: Virtual Network Interface Controller (VNIC) netdev Vishwanathapura, Niranjana
     [not found]     ` <1481788782-89964-4-git-send-email-niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2016-12-15 17:01       ` Jason Gunthorpe
2016-12-15 17:21         ` Hefty, Sean
2016-12-15 17:24           ` Jason Gunthorpe
2016-12-15 17:26             ` Christoph Hellwig
     [not found]         ` <20161215170109.GC3264-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-12-16  2:59           ` Vishwanathapura, Niranjana
2016-12-16  4:24             ` Jason Gunthorpe
     [not found]               ` <20161216042420.GB3797-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-12-19  6:43                 ` Vishwanathapura, Niranjana
2016-12-15  7:59   ` [RFC v2 04/10] IB/hfi-vnic: VNIC Ethernet Management (EM) structure definitions Vishwanathapura, Niranjana
2016-12-15  7:59   ` [RFC v2 06/10] IB/hfi-vnic: VNIC MAC table support Vishwanathapura, Niranjana
2016-12-15  7:59   ` [RFC v2 07/10] IB/hfi-vnic: VNIC Ethernet Management Agent (VEMA) interface Vishwanathapura, Niranjana
2016-12-15  9:12   ` [RFC v2 00/10] HFI Virtual Network Interface Controller (VNIC) Leon Romanovsky
     [not found]     ` <20161215091226.GC811-U/DQcQFIOTAAJjI8aNfphQ@public.gmane.org>
2016-12-15 14:52       ` ira.weiny
     [not found]         ` <20161215145212.GA29116-W4f6Xiosr+yv7QzWx2u06xL4W9x8LtSr@public.gmane.org>
2016-12-15 16:28           ` Doug Ledford
     [not found]             ` <380b05bf-a18e-1f20-7e8e-10b61f77dec7-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-15 17:07               ` Jason Gunthorpe
2016-12-15 18:19                 ` Doug Ledford [this message]
     [not found]                   ` <4e22bf29-2260-0768-ab17-9a8df6306f37-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-12-15 18:48                     ` Jason Gunthorpe
     [not found]                       ` <20161215184837.GA16552-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-12-16  1:24                         ` ira.weiny
     [not found]                           ` <20161216012404.GD3785-W4f6Xiosr+yv7QzWx2u06xL4W9x8LtSr@public.gmane.org>
2016-12-16  2:30                             ` Vishwanathapura, Niranjana
2016-12-16  4:17                             ` Jason Gunthorpe
2017-01-17 19:27                               ` Vishwanathapura, Niranjana
     [not found]                                 ` <20170117192720.GA2833-wPcXA7LoDC+1XWohqUldA0EOCMrvLtNR@public.gmane.org>
2017-01-18  5:43                                   ` Leon Romanovsky
2017-01-18 16:46                                     ` Jason Gunthorpe
     [not found]                 ` <20161215170713.GD3264-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-12-16  2:47                   ` Vishwanathapura, Niranjana
2017-01-09  7:51             ` Leon Romanovsky
     [not found]               ` <20170109075104.GV15685-U/DQcQFIOTAAJjI8aNfphQ@public.gmane.org>
2017-01-10  3:39                 ` Vishwanathapura, Niranjana
     [not found]                   ` <20170110033954.GA53664-wPcXA7LoDC+1XWohqUldA0EOCMrvLtNR@public.gmane.org>
2017-01-10  8:14                     ` Leon Romanovsky
     [not found]                       ` <20170110081402.GH7218-U/DQcQFIOTAAJjI8aNfphQ@public.gmane.org>
2017-01-11  9:05                         ` Vishwanathapura, Niranjana
2017-01-11  9:16                           ` Leon Romanovsky
2016-12-15  7:59 ` [RFC v2 05/10] IB/hfi-vnic: VNIC statistics support Vishwanathapura, Niranjana
2016-12-15  7:59 ` [RFC v2 08/10] IB/hfi-vnic: VNIC Ethernet Management Agent (VEMA) function Vishwanathapura, Niranjana
2016-12-15  7:59 ` [RFC v2 09/10] IB/hfi1: Virtual Network Interface Controller (VNIC) support Vishwanathapura, Niranjana
2016-12-15  7:59 ` [RFC v2 10/10] IB/hfi1: VNIC SDMA support Vishwanathapura, Niranjana
2016-12-15 16:56 ` [RFC v2 00/10] HFI Virtual Network Interface Controller (VNIC) Jason Gunthorpe
     [not found]   ` <20161215165611.GB3264-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2016-12-16  4:14     ` Vishwanathapura, Niranjana

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