On Sun, Apr 26, 2009 at 02:31:18PM +0300, Jack Morgenstein wrote: > 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.
That is hugely unfriendly and not really 'the linux way'.. Jason _______________________________________________ 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
