On Thu, Feb 25, 2010 at 1:39 AM, Dries Kimpe <[email protected]> wrote: > > Hi, > > for various reasons I'm trying to force a specific setting for > the link speed and link width of an IB link. > > I know opensm has an option to force link speed to a certain value. I > modified OpenSM (3.3.5) and added a similar option for link width > (link_width_enabled field of port info struct). > > Reading the IB spec, link_width_enabled is marked as read-write, just as > the link speed field. > > However, it doesn't seem to work. I verified that link_width_enabled is > correctly set.
The link won't renegotiate automatically. The link needs to be reset after updating the speed/width enabled values. Was that done ? > My questions: > > - Is support for changing link width dependent on driver version > or specific IB hardware? > > - Is there another way to get what I want (control over link width+speed)? The latest ibportstate can do this. -- Hal > Thanks, > Dries > > PS. Please cc me. I'm not on the list. > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
