On Fri, Mar 27, 2015 at 6:16 PM, ira.weiny <ira.weiny@xxxxxxxxx> wrote: > On Fri, Mar 27, 2015 at 10:13:19AM -0600, Jason Gunthorpe wrote: >> On Fri, Mar 27, 2015 at 04:47:36PM +0100, Michael Wang wrote: >> > >> > Introduce helper has_iwarp() to help us check if an IB device >> > support IWARP protocol. >> >> Should probably be !has_rdma_read_sges() >> >> True if the device can handle more than one SGE entry on a RDMA READ >> work request. > > Isn't this value already provided by the query_device verb? > > The verbs spec states the Query HCA contains the: > > "Maximum number of scatter/gather entries per Work Request supported by the > HCA." I'm not sure but may be query_device() is just too expensive for this path? I need some investigation here too. Regards, Michael Wang > > -- Ira > >> >> Jason -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
