On 03/31/2015 12:35 AM, Jason Gunthorpe wrote: > On Mon, Mar 30, 2015 at 05:10:12PM +0200, Michael Wang wrote: >> I found that actually we don't have to touch this one which >> only used by HW driver currently. > I'm having a hard time understanding this, the code in question was in > > net/sunrpc/xprtrdma/svc_rdma_recvfrom.c > > Which is the NFS ULP, not a device driver. I'm not familiar with this part too :-P but yes, it looks like an ulp to support NFS. Actually I'm thinking about Doug's idea to use rdma_transport_is_XX() instead of the current basic helper, thus may be use rdma_transport_is_iwarp() in here could be better, since it's actually a feature of iwarp tech that RDMA Read only support one scatter-gather entry. But I need more investigation on that idea, there are some part especially inside device driver I'm not very clear, things could be more easier if the semantic there is compatible with Doug's proposal ;-) Regards, Michael Wang > > Regards, > Jason -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
