[openib-general] [PATCH] Allow setting of NodeDescription

[Hal Rosenstock]

On Wed, 2005-09-14 at 21:56, Roland Dreier wrote:
>     Roland>  - Allows userspace to set node_desc by writing into sysfs file, eg.
>     Roland>      echo -n `hostname` >> /sys/class/infiniband/mthca0/node_desc
> 
>     Hal> Shouldn't there be a non volatile way to do this ?
> 
> I'm not sure what "non volatile" means in this context.  For Mellanox
> HCAs, one can already set a permanent NodeDescription in the flash
> when burning firmware.  Also, the echo command above was just an
> example; a hotplug script could also do
> 
>     cat /my/permanent/node_desc > /sys/class/infiniband/mthca0/node_desc
> 
> or anything more elaborate it wants.

The issue I see with changing this "on the fly" is that the SM has no
way of knowing it changed (other than polling this which is less than
optimal).

-- Hal