[openib-general] RE: [PATCH][iWARP] Another CM Verbs Approach

[Tom Tucker]

> -----Original Message-----
> From: Roland Dreier [mailto:rolandd at cisco.com] 
> Sent: Friday, August 26, 2005 1:03 PM
> To: Tom Tucker
> Cc: Roland Dreier; Sean Hefty; openib-general at openib.org
> Subject: Re: [PATCH][iWARP] Another CM Verbs Approach
> 
>     Roland> I'd like to understand that last bit above about devices
>     Roland> that establish connections internally.  Does that mean
>     Roland> that there are RNICs that cannot support the iWARP verbs'
>     Roland> notion of migrating a connection?
> 
>     Tom> Yes, that's what it means and the reason is that Linux does
>     Tom> not (yet) provide a means to do so.
> 
> Now I'm confused.  Is the problem that the Linux network stack does
> not have an interface for transferring TCP state, or is it that some
> RNIC hardware does not support taking control of an existing TCP
> connection?  The first problem we can fix, but the second one 
> we can't.

Sorry for the confusion. Our current product does not currently 
support migrating connections. Our next device does. 

> 
>  - R.
>