[openib-general] Re: IPoIB and lid change

[Michael S. Tsirkin]

Quoting r. Roland Dreier <rdreier at cisco.com>:
> Subject: Re: IPoIB and lid change
> 
>     Michael> One simple way to address this would be to have a list of
>     Michael> all address handles per net device and kill them on an SM
>     Michael> change event.
> 
> Seems reasonable.  It seems a little painful to implement at a first
> glance but I might be looking at it wrong.

Here's my plan (might not have the time to look at it before Sunday
which is why I'm not just doing it and sending a patch):

- start with ipoib_all_neigh_issues_2.patch
- make the neigh list per-device
- now in the destructor we'll walk
  the list of devices rather than the global neigh list
- walk all neighbours and kill lids on client reregistration event

We now get the destructor issue fixed in a slightly less ugly way,
code will be ready for when destructor moves into the params
structure, and the LID change will get fixed for simplest/common case.

Does this look like a good plan?

-- 
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies