[swg] RE: [openib-general] socket based connectionmodel for IB proposal -round 4

[Kanevsky, Arkady]

Sean,
SWG discussed today the extending private data format proposal to
SIDR_REQ.
The group does not see the need for it since ULP is no RDMA aware.
That is ULP does not use RDMA operations.
Do you have some specific ULP in mind for this functionality?
For UDP a different IP address can be used for each message. There is no
persistent connection.

Arkady


Arkady Kanevsky                       email: arkady at netapp.com
Network Appliance Inc.               phone: 781-768-5395
275 Totten Pond Rd.                  Fax: 781-895-1195
Waltham, MA 02451-2010          central phone: 781-768-5300
 

> -----Original Message-----
> From: Sean Hefty [mailto:mshefty at ichips.intel.com] 
> Sent: Wednesday, November 23, 2005 3:41 PM
> To: Ted H. Kim
> Cc: Kanevsky, Arkady; swg at infinibandta.org; openib-general at openib.org
> Subject: Re: [swg] RE: [openib-general] socket based 
> connectionmodel for IB proposal -round 4
> 
> Ted H. Kim wrote:
> > I know we originally set out to compress everything down to the 
> > minimum to preserve as much ULP specific private data as 
> possible. But 
> > it seems to me in the current proposal we have reserved space now 
> > which could be used to re-expand the version to major 4-bits and 
> > minor-4 bits without harming anything else.
> 
> I don't see any benefit to having 2 4-bit version numbers 
> over a single 8-bit number.  A single 4-bit version number 
> should suffice.  If all version numbers are ever consumed, 
> then version 15 can define an extended version field.  IMO, 
> multiple version fields simply complicate the implementation.
> 
> I would rather see the reserved space used to define the size 
> of carried user-private data.
> 
> - Sean
>