On Wed, Nov 01, 2017 at 12:07:07PM +0000, Amrani, Ram wrote: > Hi All, > I've installed rdma-core-15 on kernel 4.3 and ran into issues. > > It seems this kernel doesn't include the following patch: > https://github.com/torvalds/linux/commit/aa744cc01fe0f21dfbe2744d3fd5f2fb3244c9b3 > > So IB_QP_SMAC is present in kernel 4.3 but not in rdma-core-15. > This caused a failure here: > > int ibv_cmd_modify_qp(struct ibv_qp *qp, struct ibv_qp_attr *attr, > int attr_mask, > struct ibv_modify_qp *cmd, size_t cmd_size) > { > /* > * Masks over IBV_QP_DEST_QPN are only supported by > * ibv_cmd_modify_qp_ex. > */ > if (attr_mask & ~((IBV_QP_DEST_QPN << 1) - 1)) > return EOPNOTSUPP; WTF is this? Based on the comment it should be: if (attr_mask & ~((1ULL << (IBV_QP_DEST_QPN + 1)) - 1)) To match the comment. And other places have the same mistake. This was broken recently by 3ca7a1031486b588a7fbe0d262f8f89738215b58 Bodong?? > Do we expect these versions to operate? > If not, from what version do we support backward compatibility? > Are there any other backward compatibility issues you are aware of? rdma-core should work with all kernel versions, anything else is a bad bug. 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
