netdev - Re: [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS

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Date:	Wed, 15 Aug 2007 22:26:55 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Steve Wise <swise@...ngridcomputing.com>
CC:	David Miller <davem@...emloft.net>, mshefty@...ips.intel.com,
	rdreier@...co.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, general@...ts.openfabrics.org
Subject: Re: [ofa-general] Re: [PATCH RFC] RDMA/CMA: Allocate PS_TCP ports
 from the host TCP port space.

Steve Wise wrote:
> 
> 
> David Miller wrote:
>> From: Sean Hefty <mshefty@...ips.intel.com>
>> Date: Thu, 09 Aug 2007 14:40:16 -0700
>>
>>> Steve Wise wrote:
>>>> Any more comments?
>>> Does anyone have ideas on how to reserve the port space without using 
>>> a struct socket?
>>
>> How about we just remove the RDMA stack altogether?  I am not at all
>> kidding.  If you guys can't stay in your sand box and need to cause
>> problems for the normal network stack, it's unacceptable.  We were
>> told all along the if RDMA went into the tree none of this kind of
>> stuff would be an issue.
> 
> I think removing the RDMA stack is the wrong thing to do, and you 
> shouldn't just threaten to yank entire subsystems because you don't like 
> the technology.  Lets keep this constructive, can we?  RDMA should get 
> the respect of any other technology in Linux.  Maybe its a niche in your 
> opinion, but come on, there's more RDMA users than say, the sparc64 
> port.  Eh?

It's not about being a niche.  It's about creating a maintainable 
software net stack that has predictable behavior.

Needing to reach out of the RDMA sandbox and reserve net stack resources 
away from itself travels a path we've consistently avoided.


>> I will NACK any patch that opens up sockets to eat up ports or
>> anything stupid like that.
> 
> Got it.

Ditto for me as well.

	Jeff


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