On Friday 24 April 2009 02:48, Jason Gunthorpe wrote: > AFAIK, Ubuntu does not do any work on their IB drivers, so the driver > is stock 2.6.27. > > In principle OFED is supposed to start with an upstream kernel and > backport those drivers to various distributions. OFED 1.3 was using > 2.6.24, OFED 1.4 is apparently using 2.6.27. > > So it should be similar to OFED 1.4 > > Though bear in mind OFED still patches things with stuff that is not > yet accepted upstream so there will be some differences. > > It should be compatible with the OFED 1.4 userspace. > Beware -- you should not use OFED userspace with a non-ofed kernel for ConnectX HCAs. The OFED 1.4 ConnectX driver includes the XRC (Extended RC) patches -- which grab 23 (the MSB) of the QP number to indicate an XRC SRQ in CQEs. Non-OFED kernels do not reserve bit 23 for this usage, so you will experience incompatibility problems.
In general, you should not use OFED userspace libraries with non-OFED kernel distributions. - Jack _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
