[ofa-general] [PATCH] for-2.6.23 ib/umad: add partition support

[Sean Hefty]

Roland Dreier wrote:
>  > -#define IB_USER_MAD_ABI_VERSION	5
>  > +#define IB_USER_MAD_ABI_VERSION	6
> 
> Bummer -- we've been able to keep the ABI stable for almost 2 years
> now.  I wonder if there's something clever we can do to avoid breaking
> existing apps?

Did you have something in mind?  (new ioctl?  re-using existing fields?)

Not all fields are used for both reads and writes.  E.g. status is 
unused on a write, and retries is unused on a read.  Storing the 
pkey_index on a read seems doable.  I think if we do anything on a 
write, we need to make an assumption that the data is currently set to 0 
by the app.

- Sean