[ofa-general] Re: [PATCH 2/2] IB/IPoIB: Separate IB events to groups and handle each according to level of severity

[Hal Rosenstock]

On Thu, 2008-05-22 at 19:06 +0300, Olga Shern (Voltaire) wrote:
> I didn't explain it well, I will try again :)
>  
> On SM change event we will not destroy ah but will flush paths,
> therefore unicast traffic will continue without packets lost.
> When there will be arp probe (issued by the kernel) it will look for a
> path and because we have deleted it  will issue path query to SM and
> after reply from sm it will create a new ah that will replace the old
> ah.

So the new path parameters do become available after a while (once the
SA PR query is responded to). In the interim, IPoIB continues to send
using the potentially old AH in the hope that nothing changes. If so,
this sounds OK to me.

> Before this patch all packets were dropped till there is a new ah,
> this patch creating new ah at the background
 
> I hope  it is clear now.

If what I wrote above is a restatement, then it's clearer to me now.
Thanks.

-- Hal

> Olga